Are there big block device regressions or changes in rawhide kernel?

Richard W.M. Jones rjones at redhat.com
Mon Feb 8 10:54:03 UTC 2010


I'm seeing very strange problems in Rawhide at the moment where a
guest kernel (running under qemu) gets stacks of block device errors.
These occur under both IDE and virtio.  The block device is backed
with a plain file on the host, so obviously no real error should be
occurring.

It's confusing that it happens with both IDE (ie. libata) and virtio.

Here is the kernel output on boot.  The guest has 4 block devices
attached, and as I said above they are just plain empty files on the
host side.

Seems to be a very recent change (< 5 days ago).  Any ideas?

Rich.

--- with IDE ---

[   13.663451] Freeing unused kernel memory: 1520k freed
[   13.686557] Freeing unused kernel memory: 1816k freed
Starting /init script ...
[   14.143952] awk used greatest stack depth: 4472 bytes left
Starting udev: udevd[88]: SYSFS{}= will be removed in a future udev version, please use ATTR{}= to match the event device, or ATTRS{}= to match a parent device, in /lib/udev/rules.d/88-clock.rules:1

udevd[88]: SYSFS{}= will be removed in a future udev version, please use ATTR{}= to match the event device, or ATTRS{}= to match a parent device, in /lib/udev/rules.d/88-clock.rules:2

[   18.444139] udev: starting version 151
[   24.993952] piix4_smbus 0000:00:01.3: SMBus Host Controller at 0xb100, revision 0
[   25.215316] virtio-pci 0000:00:02.0: found PCI INT A -> IRQ 10
[   28.851576] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   28.852086] ata1.00: BMDMA stat 0x5
[   28.853135] ata1.00: failed command: READ DMA
[   28.853688] ata1.00: cmd c8/00:30:00:00:00/00:00:00:00:00/e0 tag 0 dma 24576 in
[   28.853711]          res 41/04:30:00:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   28.854088] ata1.00: status: { DRDY ERR }
[   28.854409] ata1.00: error: { ABRT }
[   29.192484] ata1.00: configured for MWDMA2
[   29.315598] ata1.01: configured for MWDMA2
[   29.316707] ata1: EH complete
[   29.462271] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   29.462952] ata1.00: BMDMA stat 0x5
[   29.462952] ata1.00: failed command: READ DMA
[   29.462952] ata1.00: cmd c8/00:30:00:00:00/00:00:00:00:00/e0 tag 0 dma 24576 in
[   29.462952]          res 41/04:30:00:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   29.463177] ata1.00: status: { DRDY ERR }
[   29.463530] ata1.00: error: { ABRT }
[   29.700249] ata1.00: configured for MWDMA2
[   29.873805] ata1.01: configured for MWDMA2
[   29.876122] ata1: EH complete
[   30.139876] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   30.141205] ata1.00: BMDMA stat 0x5
[   30.141612] ata1.00: failed command: READ DMA
[   30.142140] ata1.00: cmd c8/00:30:00:00:00/00:00:00:00:00/e0 tag 0 dma 24576 in
[   30.142159]          res 41/04:30:00:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   30.144052] ata1.00: status: { DRDY ERR }
[   30.144422] ata1.00: error: { ABRT }
[   30.622719] ata1.00: configured for MWDMA2
[   30.719775] ata1.01: configured for MWDMA2
[   30.721445] ata1: EH complete
[   30.966741] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   30.967187] ata1.00: BMDMA stat 0x5
[   30.968070] ata1.00: failed command: READ DMA
[   30.968471] ata1.00: cmd c8/00:30:00:00:00/00:00:00:00:00/e0 tag 0 dma 24576 in
[   30.968494]          res 41/04:30:00:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   30.969047] ata1.00: status: { DRDY ERR }
[   30.969333] ata1.00: error: { ABRT }
[   31.386791] ata1.00: configured for MWDMA2
[   31.521175] ata1.01: configured for MWDMA2
[   31.523074] ata1: EH complete
[   31.777230] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   31.778066] ata1.00: BMDMA stat 0x5
[   31.778400] ata1.00: failed command: READ DMA
[   31.779092] ata1.00: cmd c8/00:30:00:00:00/00:00:00:00:00/e0 tag 0 dma 24576 in
[   31.779112]          res 41/04:30:00:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   31.780068] ata1.00: status: { DRDY ERR }
[   31.780406] ata1.00: error: { ABRT }
[   32.173834] ata1.00: configured for MWDMA2
[   32.365776] ata1.01: configured for MWDMA2
[   32.367460] ata1: EH complete
[   32.583889] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   32.583952] ata1.00: BMDMA stat 0x5
[   32.584166] ata1.00: failed command: READ DMA
[   32.584599] ata1.00: cmd c8/00:30:00:00:00/00:00:00:00:00/e0 tag 0 dma 24576 in
[   32.584622]          res 41/04:30:00:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   32.585059] ata1.00: status: { DRDY ERR }
[   32.585403] ata1.00: error: { ABRT }
[   32.655952] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   32.656317] ata2.00: BMDMA stat 0x5
[   32.656650] ata2.00: failed command: READ DMA
[   32.656952] ata2.00: cmd c8/00:78:00:00:00/00:00:00:00:00/e0 tag 0 dma 61440 in
[   32.656952]          res 41/04:78:00:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   32.657167] ata2.00: status: { DRDY ERR }
[   32.657520] ata2.00: error: { ABRT }
[   32.660952] ata2.00: configured for MWDMA2
[   32.711866] ata2.01: configured for MWDMA2
[   32.712952] ata2: EH complete
[   32.852387] ata1.00: configured for MWDMA2
[   32.907256] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   32.908055] ata2.00: BMDMA stat 0x5
[   32.908376] ata2.00: failed command: READ DMA
[   32.909083] ata2.00: cmd c8/00:78:00:00:00/00:00:00:00:00/e0 tag 0 dma 61440 in
[   32.909103]          res 41/04:78:00:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   32.910054] ata2.00: status: { DRDY ERR }
[   32.911070] ata2.00: error: { ABRT }
[   33.026735] ata1.01: configured for MWDMA2
[   33.028705] sd 0:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[   33.029552] sd 0:0:0:0: [sda] Sense Key : Aborted Command [current] [descriptor]
[   33.030640] Descriptor sense data with sense descriptors (in hex):
[   33.031109]         72 0b 00 00 00 00 00 0c 00 0a 80 00 00 00 00 00 
[   33.032759]         00 00 00 00 
[   33.033339] sd 0:0:0:0: [sda] Add. Sense: No additional sense information
[   33.034165] sd 0:0:0:0: [sda] CDB: Read(10): 28 00 00 00 00 00 00 00 30 00
[   33.035774] end_request: I/O error, dev sda, sector 0
[   33.036200] Buffer I/O error on device sda, logical block 0
[   33.037448] Buffer I/O error on device sda, logical block 1
[   33.038125] Buffer I/O error on device sda, logical block 2
[   33.039064] Buffer I/O error on device sda, logical block 3
[   33.039585] Buffer I/O error on device sda, logical block 4
[   33.040095] Buffer I/O error on device sda, logical block 5
[   33.042302] ata1: EH complete
[   33.356623] ata2.00: configured for MWDMA2
[   33.541787] ata2.01: configured for MWDMA2
[   33.544076] ata2: EH complete
[   33.742772] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   33.743074] ata2.00: BMDMA stat 0x5
[   33.744077] ata2.00: failed command: READ DMA
[   33.744484] ata2.00: cmd c8/00:78:00:00:00/00:00:00:00:00/e0 tag 0 dma 61440 in
[   33.744508]          res 41/04:78:00:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   33.745064] ata2.00: status: { DRDY ERR }
[   33.745434] ata2.00: error: { ABRT }
[   33.949287] ata1.00: limiting speed to MWDMA1:PIO2
[   33.950152] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
[   33.950697] ata1.00: BMDMA stat 0x5
[   33.951062] ata1.00: failed command: READ DMA
[   33.951465] ata1.00: cmd c8/00:10:30:00:00/00:00:00:00:00/e0 tag 0 dma 8192 in
[   33.951487]          res 41/04:10:30:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   33.953052] ata1.00: status: { DRDY ERR }
[   33.953406] ata1.00: error: { ABRT }
[   33.954291] ata1: soft resetting link
[   34.111951] ata2.00: configured for MWDMA2
[   34.184846] ata2.01: configured for MWDMA2
[   34.185606] ata2: EH complete
[   34.318736] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   34.318952] ata2.00: BMDMA stat 0x5
[   34.318952] ata2.00: failed command: READ DMA
[   34.319260] ata2.00: cmd c8/00:78:00:00:00/00:00:00:00:00/e0 tag 0 dma 61440 in
[   34.319280]          res 41/04:78:00:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   34.319952] ata2.00: status: { DRDY ERR }
[   34.320094] ata2.00: error: { ABRT }
[   34.626175] ata1.00: configured for MWDMA1
[   34.634739] ata2.00: configured for MWDMA2
[   34.726709] ata1.01: configured for MWDMA2
[   34.728577] ata1: EH complete
[   34.769865] ata2.01: configured for MWDMA2
[   34.771504] ata2: EH complete
[   34.937508] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   34.938123] ata1.00: BMDMA stat 0x5
[   34.939197] ata1.00: failed command: READ DMA
[   34.939687] ata1.00: cmd c8/00:10:30:00:00/00:00:00:00:00/e0 tag 0 dma 8192 in
[   34.939716]          res 41/04:10:30:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   34.940056] ata1.00: status: { DRDY ERR }
[   34.940381] ata1.00: error: { ABRT }
[   35.046651] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   35.047080] ata2.00: BMDMA stat 0x5
[   35.048077] ata2.00: failed command: READ DMA
[   35.048503] ata2.00: cmd c8/00:78:00:00:00/00:00:00:00:00/e0 tag 0 dma 61440 in
[   35.048526]          res 41/04:78:00:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   35.050066] ata2.00: status: { DRDY ERR }
[   35.050425] ata2.00: error: { ABRT }
[   35.212147] ata1.00: configured for MWDMA1
[   35.361207] ata1.01: configured for MWDMA2
[   35.362738] ata1: EH complete
[   35.457848] ata2.00: configured for MWDMA2
[   35.557884] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   35.559096] ata1.00: BMDMA stat 0x5
[   35.559442] ata1.00: failed command: READ DMA
[   35.560093] ata1.00: cmd c8/00:10:30:00:00/00:00:00:00:00/e0 tag 0 dma 8192 in
[   35.560113]          res 41/04:10:30:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   35.561067] ata1.00: status: { DRDY ERR }
[   35.561416] ata1.00: error: { ABRT }
[   35.597496] ata2.01: configured for MWDMA2
[   35.599474] ata2: EH complete
[   35.834516] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   35.835134] ata2.00: BMDMA stat 0x5
[   35.836206] ata2.00: failed command: READ DMA
[   35.837116] ata2.00: cmd c8/00:78:00:00:00/00:00:00:00:00/e0 tag 0 dma 61440 in
[   35.837148]          res 41/04:78:00:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   35.838052] ata2.00: status: { DRDY ERR }
[   35.838394] ata2.00: error: { ABRT }
[   35.951594] ata1.00: configured for MWDMA1
[   36.101569] ata1.01: configured for MWDMA2
[   36.103339] ata1: EH complete
[   36.193952] ata2.00: configured for MWDMA2
[   36.275877] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   36.275952] ata1.00: BMDMA stat 0x5
[   36.276093] ata1.00: failed command: READ DMA
[   36.276379] ata1.00: cmd c8/00:10:30:00:00/00:00:00:00:00/e0 tag 0 dma 8192 in
[   36.276398]          res 41/04:10:30:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   36.276952] ata1.00: status: { DRDY ERR }
[   36.276952] ata1.00: error: { ABRT }
[   36.308952] ata2.01: configured for MWDMA2
[   36.309413] sd 1:0:0:0: [sdc] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[   36.309899] sd 1:0:0:0: [sdc] Sense Key : Aborted Command [current] [descriptor]
[   36.310122] Descriptor sense data with sense descriptors (in hex):
[   36.310472]         72 0b 00 00 00 00 00 0c 00 0a 80 00 00 00 00 00 
[   36.310952]         00 00 00 00 
[   36.310952] sd 1:0:0:0: [sdc] Add. Sense: No additional sense information
[   36.311110] sd 1:0:0:0: [sdc] CDB: Read(10): 28 00 00 00 00 00 00 00 78 00
[   36.311926] end_request: I/O error, dev sdc, sector 0
[   36.311952] Buffer I/O error on device sdc, logical block 0
[   36.312193] Buffer I/O error on device sdc, logical block 1
[   36.312578] Buffer I/O error on device sdc, logical block 2
[   36.312922] Buffer I/O error on device sdc, logical block 3
[   36.313708] ata2: EH complete
[   36.463952] ata1.00: configured for MWDMA1
[   36.481952] ata1.01: configured for MWDMA2
[   36.482520] ata1: EH complete
[   36.560355] ata2.00: limiting speed to MWDMA1:PIO2
[   36.560881] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
[   36.561053] ata2.00: BMDMA stat 0x5
[   36.561331] ata2.00: failed command: READ DMA
[   36.562091] ata2.00: cmd c8/00:88:78:00:00/00:00:00:00:00/e0 tag 0 dma 69632 in
[   36.562111]          res 41/04:88:78:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   36.563047] ata2.00: status: { DRDY ERR }
[   36.563319] ata2.00: error: { ABRT }
[   36.564423] ata2: soft resetting link
[   36.580781] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   36.581081] ata1.00: BMDMA stat 0x5
[   36.582498] ata1.00: failed command: READ DMA
[   36.583121] ata1.00: cmd c8/00:10:30:00:00/00:00:00:00:00/e0 tag 0 dma 8192 in
[   36.583141]          res 41/04:10:30:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   36.584047] ata1.00: status: { DRDY ERR }
[   36.585079] ata1.00: error: { ABRT }
[   36.846507] ata1.00: configured for MWDMA1
[   36.890496] ata2.00: configured for MWDMA1
[   36.996690] ata1.01: configured for MWDMA2
[   36.998488] ata1: EH complete
[   37.025752] ata2.01: configured for MWDMA2
[   37.027692] ata2: EH complete
[   37.139534] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   37.140140] ata1.00: BMDMA stat 0x5
[   37.140573] ata1.00: failed command: READ DMA
[   37.141197] ata1.00: cmd c8/00:10:30:00:00/00:00:00:00:00/e0 tag 0 dma 8192 in
[   37.141217]          res 41/04:10:30:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   37.142059] ata1.00: status: { DRDY ERR }
[   37.142408] ata1.00: error: { ABRT }
[   37.163580] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   37.164060] ata2.00: BMDMA stat 0x5
[   37.165079] ata2.00: failed command: READ DMA
[   37.165509] ata2.00: cmd c8/00:88:78:00:00/00:00:00:00:00/e0 tag 0 dma 69632 in
[   37.165532]          res 41/04:88:78:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   37.167224] ata2.00: status: { DRDY ERR }
[   37.167570] ata2.00: error: { ABRT }
[   37.363775] ata1.00: configured for MWDMA1
[   37.449642] ata2.00: configured for MWDMA1
[   37.485902] ata1.01: configured for MWDMA2
[   37.488065] sd 0:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[   37.488717] sd 0:0:0:0: [sda] Sense Key : Aborted Command [current] [descriptor]
[   37.489481] Descriptor sense data with sense descriptors (in hex):
[   37.490081]         72 0b 00 00 00 00 00 0c 00 0a 80 00 00 00 00 00 
[   37.491735]         00 00 00 30 
[   37.492317] sd 0:0:0:0: [sda] Add. Sense: No additional sense information
[   37.493132] sd 0:0:0:0: [sda] CDB: Read(10): 28 00 00 00 00 30 00 00 10 00
[   37.494482] end_request: I/O error, dev sda, sector 48
[   37.496387] ata1: EH complete
[   37.530651] ata2.01: configured for MWDMA2
[   37.531391] ata2: EH complete
[   37.619880] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   37.619952] ata2.00: BMDMA stat 0x5
[   37.620216] ata2.00: failed command: READ DMA
[   37.620643] ata2.00: cmd c8/00:88:78:00:00/00:00:00:00:00/e0 tag 0 dma 69632 in
[   37.620666]          res 41/04:88:78:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   37.621062] ata2.00: status: { DRDY ERR }
[   37.621411] ata2.00: error: { ABRT }
[   37.762952] ata2.00: configured for MWDMA1
[   37.830949] ata2.01: configured for MWDMA2
[   37.832081] ata2: EH complete
[   37.887348] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   37.888057] ata1.01: BMDMA stat 0x5
[   37.888273] ata1.01: failed command: READ DMA
[   37.888551] ata1.01: cmd c8/00:00:00:00:00/00:00:00:00:00/f0 tag 0 dma 131072 in
[   37.888570]          res 41/04:00:00:00:00/00:00:00:00:00/f0 Emask 0x1 (device error)
[   37.889047] ata1.01: status: { DRDY ERR }
[   37.889273] ata1.01: error: { ABRT }
[   37.919878] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   37.920083] ata2.00: BMDMA stat 0x5
[   37.921400] ata2.00: failed command: READ DMA
[   37.922197] ata2.00: cmd c8/00:88:78:00:00/00:00:00:00:00/e0 tag 0 dma 69632 in
[   37.922216]          res 41/04:88:78:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   37.923065] ata2.00: status: { DRDY ERR }
[   37.923321] ata2.00: error: { ABRT }
[   38.102407] ata1.00: configured for MWDMA1
[   38.154628] ata2.00: configured for MWDMA1
[   38.179319] ata1.01: configured for MWDMA2
[   38.181490] ata1: EH complete
[   38.238393] ata2.01: configured for MWDMA2
[   38.240114] ata2: EH complete
[   38.308639] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   38.309131] ata1.01: BMDMA stat 0x5
[   38.310158] ata1.01: failed command: READ DMA
[   38.310508] ata1.01: cmd c8/00:00:00:00:00/00:00:00:00:00/f0 tag 0 dma 131072 in
[   38.310531]          res 41/04:00:00:00:00/00:00:00:00:00/f0 Emask 0x1 (device error)
[   38.311089] ata1.01: status: { DRDY ERR }
[   38.312074] ata1.01: error: { ABRT }
[   38.359952] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   38.361225] ata2.00: BMDMA stat 0x5
[   38.361495] ata2.00: failed command: READ DMA
[   38.362097] ata2.00: cmd c8/00:88:78:00:00/00:00:00:00:00/e0 tag 0 dma 69632 in
[   38.362116]          res 41/04:88:78:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   38.363057] ata2.00: status: { DRDY ERR }
[   38.363334] ata2.00: error: { ABRT }
[   38.543791] ata1.00: configured for MWDMA1
[   38.582304] ata2.00: configured for MWDMA1
[   38.623515] ata1.01: configured for MWDMA2
[   38.625493] ata1: EH complete
[   38.675225] ata2.01: configured for MWDMA2
[   38.676732] ata2: EH complete
[   38.776609] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   38.777234] ata2.00: BMDMA stat 0x5
[   38.778166] ata2.00: failed command: READ DMA
[   38.778463] ata2.00: cmd c8/00:88:78:00:00/00:00:00:00:00/e0 tag 0 dma 69632 in
[   38.778483]          res 41/04:88:78:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   38.779071] ata2.00: status: { DRDY ERR }
[   38.780046] ata2.00: error: { ABRT }
[   38.837557] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   38.838135] ata1.00: BMDMA stat 0x5
[   38.838451] ata1.00: failed command: READ DMA
[   38.839254] ata1.00: cmd c8/00:c0:40:00:00/00:00:00:00:00/e0 tag 0 dma 98304 in
[   38.839273]          res 41/04:c0:40:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   38.840050] ata1.00: status: { DRDY ERR }
[   38.841062] ata1.00: error: { ABRT }
[   38.975813] ata2.00: configured for MWDMA1
[   39.002731] ata1.00: configured for MWDMA1
[   39.055202] ata2.01: configured for MWDMA2
[   39.057093] sd 1:0:0:0: [sdc] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[   39.057579] sd 1:0:0:0: [sdc] Sense Key : Aborted Command [current] [descriptor]
[   39.058364] Descriptor sense data with sense descriptors (in hex):
[   39.058705]         72 0b 00 00 00 00 00 0c 00 0a 80 00 00 00 00 00 
[   39.059803]         00 00 00 78 
[   39.060240] sd 1:0:0:0: [sdc] Add. Sense: No additional sense information
[   39.060701] sd 1:0:0:0: [sdc] CDB: Read(10): 28 00 00 00 00 78 00 00 88 00
[   39.061591] end_request: I/O error, dev sdc, sector 120
[   39.062110] quiet_error: 13 callbacks suppressed
[   39.062386] Buffer I/O error on device sdc, logical block 15
[   39.063217] Buffer I/O error on device sdc, logical block 16
[   39.063604] Buffer I/O error on device sdc, logical block 17
[   39.064092] Buffer I/O error on device sdc, logical block 18
[   39.064433] Buffer I/O error on device sdc, logical block 19
[   39.064796] Buffer I/O error on device sdc, logical block 20
[   39.064952] Buffer I/O error on device sdc, logical block 21
[   39.064952] Buffer I/O error on device sdc, logical block 22
[   39.065097] Buffer I/O error on device sdc, logical block 23
[   39.065513] Buffer I/O error on device sdc, logical block 24
[   39.066362] ata2: EH complete
[   39.097339] ata1.01: configured for MWDMA2
[   39.098447] ata1: EH complete
[   39.174902] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   39.175648] ata1.00: BMDMA stat 0x5
[   39.175952] ata1.00: failed command: READ DMA
[   39.175952] ata1.00: cmd c8/00:c0:40:00:00/00:00:00:00:00/e0 tag 0 dma 98304 in
[   39.175952]          res 41/04:c0:40:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   39.176110] ata1.00: status: { DRDY ERR }
[   39.176449] ata1.00: error: { ABRT }
[   39.287580] ata1.00: configured for MWDMA1
[   39.371632] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   39.372202] ata2.00: BMDMA stat 0x5
[   39.373161] ata2.00: failed command: READ DMA
[   39.374117] ata2.00: cmd c8/00:20:00:4f:00/00:00:00:00:00/e0 tag 0 dma 16384 in
[   39.374137]          res 41/04:20:00:4f:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   39.375048] ata2.00: status: { DRDY ERR }
[   39.376067] ata2.00: error: { ABRT }
[   39.387154] ata1.01: configured for MWDMA2
[   39.389116] ata1: EH complete
[   39.491490] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   39.492061] ata1.00: BMDMA stat 0x5
[   39.492393] ata1.00: failed command: READ DMA
[   39.493083] ata1.00: cmd c8/00:c0:40:00:00/00:00:00:00:00/e0 tag 0 dma 98304 in
[   39.493103]          res 41/04:c0:40:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   39.494047] ata1.00: status: { DRDY ERR }
[   39.495244] ata1.00: error: { ABRT }
[   39.541700] ata2.00: configured for MWDMA1
[   39.622931] ata2.01: configured for MWDMA2
[   39.624808] ata2: EH complete
[   39.696758] ata1.00: configured for MWDMA1
[   39.713241] ata2.00: limiting speed to PIO2
[   39.714240] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
[   39.714718] ata2.00: BMDMA stat 0x5
[   39.714952] ata2.00: failed command: READ DMA
[   39.714952] ata2.00: cmd c8/00:20:00:4f:00/00:00:00:00:00/e0 tag 0 dma 16384 in
[   39.714952]          res 41/04:20:00:4f:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   39.716056] ata2.00: status: { DRDY ERR }
[   39.716405] ata2.00: error: { ABRT }
[   39.717280] ata2: soft resetting link
[   39.755772] ata1.01: configured for MWDMA2
[   39.758114] ata1: EH complete
[   39.865737] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   39.867128] ata1.00: BMDMA stat 0x5
[   39.867420] ata1.00: failed command: READ DMA
[   39.867767] ata1.00: cmd c8/00:c0:40:00:00/00:00:00:00:00/e0 tag 0 dma 98304 in
[   39.867787]          res 41/04:c0:40:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   39.868332] ata1.00: status: { DRDY ERR }
[   39.868680] ata1.00: error: { ABRT }
[   39.915562] ata2.00: configured for PIO2
[   39.962718] ata2.01: configured for MWDMA2
[   39.964411] ata2: EH complete
[   40.052680] ata1.00: configured for MWDMA1
[   40.124618] ata1.01: configured for MWDMA2
[   40.127121] ata1: EH complete
[   40.246678] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   40.247072] ata1.00: BMDMA stat 0x5
[   40.248408] ata1.00: failed command: READ DMA
[   40.249114] ata1.00: cmd c8/00:c0:40:00:00/00:00:00:00:00/e0 tag 0 dma 98304 in
[   40.249146]          res 41/04:c0:40:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   40.250048] ata1.00: status: { DRDY ERR }
[   40.251063] ata1.00: error: { ABRT }
[   40.454347] ata1.00: configured for MWDMA1
[   40.542641] ata1.01: configured for MWDMA2
[   40.543528] ata1: EH complete
[   40.595952] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   40.596124] ata1.00: BMDMA stat 0x5
[   40.596465] ata1.00: failed command: READ DMA
[   40.596880] ata1.00: cmd c8/00:c0:40:00:00/00:00:00:00:00/e0 tag 0 dma 98304 in
[   40.596899]          res 41/04:c0:40:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   40.597059] ata1.00: status: { DRDY ERR }
[   40.597411] ata1.00: error: { ABRT }
[   40.684919] ata1.00: configured for MWDMA1
[   40.737733] ata1.01: configured for MWDMA2
[   40.738725] sd 0:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[   40.739186] sd 0:0:0:0: [sda] Sense Key : Aborted Command [current] [descriptor]
[   40.739929] Descriptor sense data with sense descriptors (in hex):
[   40.739952]         72 0b 00 00 00 00 00 0c 00 0a 80 00 00 00 00 00 
[   40.741069]         00 00 00 40 
[   40.741514] sd 0:0:0:0: [sda] Add. Sense: No additional sense information
[   40.742120] sd 0:0:0:0: [sda] CDB: Read(10): 28 00 00 00 00 40 00 00 c0 00
[   40.743574] end_request: I/O error, dev sda, sector 64
[   40.746456] ata1: EH complete
[   41.025634] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   41.026072] ata1.01: BMDMA stat 0x5
[   41.027084] ata1.01: failed command: READ DMA
[   41.027503] ata1.01: cmd c8/00:00:00:00:00/00:00:00:00:00/f0 tag 0 dma 131072 in
[   41.027533]          res 41/04:00:00:00:00/00:00:00:00:00/f0 Emask 0x1 (device error)
[   41.028053] ata1.01: status: { DRDY ERR }
[   41.028392] ata1.01: error: { ABRT }
[   41.202756] ata1.00: configured for MWDMA1
[   41.278585] ata1.01: configured for MWDMA2
[   41.281278] ata1: EH complete
[   41.470740] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   41.471092] ata1.01: BMDMA stat 0x5
[   41.472068] ata1.01: failed command: READ DMA
[   41.472404] ata1.01: cmd c8/00:00:00:00:00/00:00:00:00:00/f0 tag 0 dma 131072 in
[   41.472428]          res 41/04:00:00:00:00/00:00:00:00:00/f0 Emask 0x1 (device error)
[   41.473056] ata1.01: status: { DRDY ERR }
[   41.473326] ata1.01: error: { ABRT }
[   41.652873] ata1.00: configured for MWDMA1
[   41.737402] ata1.01: configured for MWDMA2
[   41.739513] ata1: EH complete
[   41.946613] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   41.947246] ata1.01: BMDMA stat 0x5
[   41.948186] ata1.01: failed command: READ DMA
[   41.949116] ata1.01: cmd c8/00:00:00:00:00/00:00:00:00:00/f0 tag 0 dma 131072 in
[   41.949136]          res 41/04:00:00:00:00/00:00:00:00:00/f0 Emask 0x1 (device error)
[   41.950059] ata1.01: status: { DRDY ERR }
[   41.950331] ata1.01: error: { ABRT }
[   42.139648] ata1.00: configured for MWDMA1
[   42.238265] ata1.01: configured for MWDMA2
[   42.240500] ata1: EH complete
[   42.347583] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   42.348070] ata1.01: BMDMA stat 0x5
[   42.348342] ata1.01: failed command: READ DMA
[   42.349115] ata1.01: cmd c8/00:00:00:00:00/00:00:00:00:00/f0 tag 0 dma 131072 in
[   42.349135]          res 41/04:00:00:00:00/00:00:00:00:00/f0 Emask 0x1 (device error)
[   42.350064] ata1.01: status: { DRDY ERR }
[   42.350324] ata1.01: error: { ABRT }
[   42.512952] ata1.00: configured for MWDMA1
[   42.556952] ata1.01: configured for MWDMA2
[   42.557766] sd 0:0:1:0: [sdb] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[   42.558067] sd 0:0:1:0: [sdb] Sense Key : Aborted Command [current] [descriptor]
[   42.558631] Descriptor sense data with sense descriptors (in hex):
[   42.558952]         72 0b 00 00 00 00 00 0c 00 0a 80 00 00 00 00 00 
[   42.559466]         00 00 00 00 
[   42.559805] sd 0:0:1:0: [sdb] Add. Sense: No additional sense information
[   42.559952] sd 0:0:1:0: [sdb] CDB: Read(10): 28 00 00 00 00 00 00 01 00 00
[   42.560219] end_request: I/O error, dev sdb, sector 0
[   42.561952] ata1: EH complete
[   42.765870] ata1.01: limiting speed to MWDMA1:PIO2
[   42.765952] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
[   42.766204] ata1.01: BMDMA stat 0x5
[   42.766461] ata1.01: failed command: READ DMA
[   42.766797] ata1.01: cmd c8/00:20:00:8f:01/00:00:00:00:00/f0 tag 0 dma 16384 in
[   42.766820]          res 41/04:20:00:8f:01/00:00:00:00:00/f0 Emask 0x1 (device error)
[   42.767085] ata1.01: status: { DRDY ERR }
[   42.767358] ata1.01: error: { ABRT }
[   42.768279] ata1: soft resetting link
[   42.955635] ata1.00: configured for MWDMA1
[   43.020643] ata1.01: configured for MWDMA1
[   43.022480] ata1: EH complete
[   43.151775] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   43.152243] ata1.01: BMDMA stat 0x5
[   43.153158] ata1.01: failed command: READ DMA
[   43.154110] ata1.01: cmd c8/00:20:00:8f:01/00:00:00:00:00/f0 tag 0 dma 16384 in
[   43.154141]          res 41/04:20:00:8f:01/00:00:00:00:00/f0 Emask 0x1 (device error)
[   43.155065] ata1.01: status: { DRDY ERR }
[   43.155346] ata1.01: error: { ABRT }
[   43.381357] ata1.00: configured for MWDMA1
[   43.471609] ata1.01: configured for MWDMA1
[   43.473503] ata1: EH complete
[   43.580616] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   43.581238] ata1.01: BMDMA stat 0x5
[   43.582180] ata1.01: failed command: READ DMA
[   43.582584] ata1.01: cmd c8/00:20:00:8f:01/00:00:00:00:00/f0 tag 0 dma 16384 in
[   43.582613]          res 41/04:20:00:8f:01/00:00:00:00:00/f0 Emask 0x1 (device error)
[   43.584070] ata1.01: status: { DRDY ERR }
[   43.584358] ata1.01: error: { ABRT }
[   43.768632] ata1.00: configured for MWDMA1
[   43.822621] ata1.01: configured for MWDMA1
[   43.824435] ata1: EH complete
[   43.960850] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   43.962105] ata1.01: BMDMA stat 0x5
[   43.962371] ata1.01: failed command: READ DMA
[   43.962770] ata1.01: cmd c8/00:20:00:8f:01/00:00:00:00:00/f0 tag 0 dma 16384 in
[   43.962792]          res 41/04:20:00:8f:01/00:00:00:00:00/f0 Emask 0x1 (device error)
[   43.963078] ata1.01: status: { DRDY ERR }
[   43.963365] ata1.01: error: { ABRT }
[   44.155646] ata1.00: configured for MWDMA1
[   44.199245] ata1.01: configured for MWDMA1
[   44.201071] ata1: EH complete
[   44.343935] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   44.345115] ata1.01: BMDMA stat 0x5
[   44.345390] ata1.01: failed command: READ DMA
[   44.345713] ata1.01: cmd c8/00:20:00:8f:01/00:00:00:00:00/f0 tag 0 dma 16384 in
[   44.345775]          res 41/04:20:00:8f:01/00:00:00:00:00/f0 Emask 0x1 (device error)
[   44.347074] ata1.01: status: { DRDY ERR }
[   44.347345] ata1.01: error: { ABRT }
[   44.524202] ata1.00: configured for MWDMA1
[   44.585441] ata1.01: configured for MWDMA1
[   44.587225] ata1: EH complete
[   44.704952] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   44.705235] ata1.01: BMDMA stat 0x5
[   44.705612] ata1.01: failed command: READ DMA
[   44.705893] ata1.01: cmd c8/00:20:00:8f:01/00:00:00:00:00/f0 tag 0 dma 16384 in
[   44.705912]          res 41/04:20:00:8f:01/00:00:00:00:00/f0 Emask 0x1 (device error)
[   44.706180] ata1.01: status: { DRDY ERR }
[   44.706485] ata1.01: error: { ABRT }
[   44.790952] ata1.00: configured for MWDMA1
[   44.793806] ata1.01: configured for MWDMA1
[   44.794491] sd 0:0:1:0: [sdb] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[   44.794952] sd 0:0:1:0: [sdb] Sense Key : Aborted Command [current] [descriptor]
[   44.794952] Descriptor sense data with sense descriptors (in hex):
[   44.795088]         72 0b 00 00 00 00 00 0c 00 0a 80 00 00 00 00 00 
[   44.795952]         00 01 8f 00 
[   44.795952] sd 0:0:1:0: [sdb] Add. Sense: No additional sense information
[   44.796352] sd 0:0:1:0: [sdb] CDB: Read(10): 28 00 00 01 8f 00 00 00 20 00
[   44.796952] end_request: I/O error, dev sdb, sector 102144
[   44.796952] quiet_error: 63 callbacks suppressed
[   44.796952] Buffer I/O error on device sdb, logical block 12768
[   44.797435] Buffer I/O error on device sdb, logical block 12769
[   44.797864] Buffer I/O error on device sdb, logical block 12770
[   44.797952] Buffer I/O error on device sdb, logical block 12771
[   44.799283] ata1: EH complete
udevd[89]: SYSFS{}= will be removed in a future udev version, please use ATTR{}= to match the event device, or ATTRS{}= to match a parent device, in /lib/udev/rules.d/88-clock.rules:1

udevd[89]: SYSFS{}= will be removed in a future udev version, please use ATTR{}= to match the event device, or ATTRS{}= to match a parent device, in /lib/udev/rules.d/88-clock.rules:2

udevd[89]: SYSFS{}= will be removed in a future udev version, please use ATTR{}= to match the event device, or ATTRS{}= to match a parent device, in /lib/udev/rules.d/88-clock.rules:1

udevd[89]: SYSFS{}= will be removed in a future udev version, please use ATTR{}= to match the event device, or ATTRS{}= to match a parent device, in /lib/udev/rules.d/88-clock.rules:2

[   53.073437] ip used greatest stack depth: 3640 bytes left
[  OK  ]
  Reading all physical volumes.  This may take a while...
[   56.505326] ata1.00: limiting speed to PIO2
[   56.506175] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
[   56.506583] ata1.00: BMDMA stat 0x5
[   56.507089] ata1.00: failed command: READ DMA
[   56.507549] ata1.00: cmd c8/00:20:00:00:00/00:00:00:00:00/e0 tag 0 dma 16384 in
[   56.507572]          res 41/04:20:00:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[   56.507952] ata1.00: status: { DRDY ERR }
[   56.507952] ata1.00: error: { ABRT }
[   56.508952] ata1: soft resetting link
[   56.667952] ata1.00: configured for PIO2
[   56.668798] ata1.01: configured for MWDMA1
[   56.670656] ata1: EH complete
[   56.889527] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[   56.890488] ata1.01: BMDMA stat 0x5
[   56.891065] ata1.01: failed command: READ DMA
[   56.891403] ata1.01: cmd c8/00:20:00:00:00/00:00:00:00:00/f0 tag 0 dma 16384 in
[   56.891425]          res 41/04:20:00:00:00/00:00:00:00:00/f0 Emask 0x1 (device error)
[   56.892050] ata1.01: status: { DRDY ERR }
[   56.893035] ata1.01: error: { ABRT }
[   56.897468] ata1.00: configured for PIO2
[   56.899214] ata1.01: configured for MWDMA1
[   56.899876] ata1: EH complete
[   56.904272] ata1.01: limiting speed to PIO2
[   56.904597] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
[   56.905038] ata1.01: BMDMA stat 0x5
[   56.905302] ata1.01: failed command: READ DMA
[   56.905617] ata1.01: cmd c8/00:20:00:00:00/00:00:00:00:00/f0 tag 0 dma 16384 in
[   56.905636]          res 41/04:20:00:00:00/00:00:00:00:00/f0 Emask 0x1 (device error)
[   56.907052] ata1.01: status: { DRDY ERR }
[   56.907324] ata1.01: error: { ABRT }
[   56.907818] ata1: soft resetting link
[   57.062815] ata1.00: configured for PIO2
[   57.064437] ata1.01: configured for PIO2
[   57.065339] ata1: EH complete

--- with virtio ---

[   11.955797] Freeing unused kernel memory: 1520k freed
[   11.980759] Freeing unused kernel memory: 1816k freed
Starting /init script ...
[   12.260927] input: ImExPS/2 Generic Explorer Mouse as /devices/platform/i8042/serio1/input/input2
[   12.774299] start_udev used greatest stack depth: 5568 bytes left
[   12.999033] awk used greatest stack depth: 5216 bytes left
Starting udev: udevd[86]: SYSFS{}= will be removed in a future udev version, please use ATTR{}= to match the event device, or ATTRS{}= to match a parent device, in /lib/udev/rules.d/88-clock.rules:1

udevd[86]: SYSFS{}= will be removed in a future udev version, please use ATTR{}= to match the event device, or ATTRS{}= to match a parent device, in /lib/udev/rules.d/88-clock.rules:2

[   16.338403] udev: starting version 151
[   20.679607] virtio-pci 0000:00:02.0: found PCI INT A -> IRQ 10
[   20.680607] virtio-pci 0000:00:02.0: sharing IRQ 10 with 0000:00:06.0
[   20.749211] piix4_smbus 0000:00:01.3: SMBus Host Controller at 0xb100, revision 0
[   20.794371] virtio-pci 0000:00:03.0: found PCI INT A -> IRQ 11
[   20.796607] virtio-pci 0000:00:04.0: found PCI INT A -> IRQ 11
[   20.820425] virtio-pci 0000:00:05.0: found PCI INT A -> IRQ 10
[   20.872356] virtio-pci 0000:00:06.0: found PCI INT A -> IRQ 10
[   20.872607] virtio-pci 0000:00:06.0: sharing IRQ 10 with 0000:00:02.0
[   28.790889]  vda: unknown partition table
[   30.574337]  vdb: unknown partition table
[   31.611607]  vdc: unknown partition table
[   31.826607] blkid used greatest stack depth: 5200 bytes left
[   32.031069]  vdd: unknown partition table
[   32.383607] modprobe used greatest stack depth: 3760 bytes left
[   37.502998] end_request: I/O error, dev vda, sector 0
[   37.503607] Buffer I/O error on device vda, logical block 0
[   37.503607] Buffer I/O error on device vda, logical block 1
[   37.525524] end_request: I/O error, dev vda, sector 16
[   37.525607] Buffer I/O error on device vda, logical block 2
[   37.525607] Buffer I/O error on device vda, logical block 3
[   37.525607] Buffer I/O error on device vda, logical block 4
[   37.525607] Buffer I/O error on device vda, logical block 5
[   37.525607] Buffer I/O error on device vda, logical block 6
[   37.525607] Buffer I/O error on device vda, logical block 7
[   37.525607] Buffer I/O error on device vda, logical block 8
[   37.525607] Buffer I/O error on device vda, logical block 9
[   37.554094] end_request: I/O error, dev vda, sector 152
[   37.666956] end_request: I/O error, dev vda, sector 1023744
[   37.691905] end_request: I/O error, dev vdb, sector 0
[   37.730973] end_request: I/O error, dev vdb, sector 40
[   37.849992] end_request: I/O error, dev vdb, sector 102144
[   38.113992] end_request: I/O error, dev vdc, sector 0
[   38.135941] end_request: I/O error, dev vdc, sector 32
[   38.153474] end_request: I/O error, dev vdc, sector 184
[   38.225907] end_request: I/O error, dev vdc, sector 20224
udevd[87]: SYSFS{}= will be removed in a future udev version, please use ATTR{}= to match the event device, or ATTRS{}= to match a parent device, in /lib/udev/rules.d/88-clock.rules:1

udevd[87]: SYSFS{}= will be removed in a future udev version, please use ATTR{}= to match the event device, or ATTRS{}= to match a parent device, in /lib/udev/rules.d/88-clock.rules:2

udevd[87]: SYSFS{}= will be removed in a future udev version, please use ATTR{}= to match the event device, or ATTRS{}= to match a parent device, in /lib/udev/rules.d/88-clock.rules:1

udevd[87]: SYSFS{}= will be removed in a future udev version, please use ATTR{}= to match the event device, or ATTRS{}= to match a parent device, in /lib/udev/rules.d/88-clock.rules:2

[   47.708607] ip used greatest stack depth: 3640 bytes left
[  OK  ]
  Reading all physical volumes.  This may take a while...
[   50.724239] end_request: I/O error, dev vda, sector 0
[   50.724607] quiet_error: 97 callbacks suppressed
[   50.724607] Buffer I/O error on device vda, logical block 0
[   50.724607] Buffer I/O error on device vda, logical block 1
[   50.724607] Buffer I/O error on device vda, logical block 2
[   50.724607] Buffer I/O error on device vda, logical block 3
  /dev/vda: read failed after 0 of 4096 at 0: Input/output error
[   50.874906] end_request: I/O error, dev vdb, sector 0
[   50.875244] Buffer I/O error on device vdb, logical block 0
[   50.875607] Buffer I/O error on device vdb, logical block 1
[   50.875607] Buffer I/O error on device vdb, logical block 2
[   50.875607] Buffer I/O error on device vdb, logical block 3
  /dev/vdb: read failed after 0 of 4096 at 0: Input/output error
[   50.893796] end_request: I/O error, dev vdc, sector 0
[   50.894234] Buffer I/O error on device vdc, logical block 0
[   50.894607] Buffer I/O error on device vdc, logical block 1
  /dev/vdc: read failed after 0 of 4096 at 0: Input/output error

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-top is 'top' for virtual machines.  Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://et.redhat.com/~rjones/virt-top


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