Problems with external SATA disk

[Frank McCormick]

I am running Fedora 20 (updated from 19) and have started having 
problems with an external SATA disk. It's connected through a USB adapter.

Smartd recognizes it but I see repeated errors in the journal about not 
being able to update smart data on the disk.

A few days ago, (around the time I updated 19 to 20) the disk after not 
being used for a while would become unresponsive with attempts to access 
the directories on it resulting in hangs.

Yet if I reboot after turning the power to the disk off and on again
everything is fine for a while.

fsck reports the two partitions on the disk are fine and if I run
a SMART short test it passes.

This is the sort of error I get if I reboot without cycling the power


>  Oct 03 11:09:54 localhost.localdomain systemd[1]: Job
> dev-disk-by\x2duuid-d8088c90\x2db24c\x2d483d\x2d8865\x2d4fdf6ac2b6a8.device/start
>  Oct 03 11:09:54 localhost.localdomain systemd[1]: Timed out waiting for device
> dev-disk-by\x2duuid-d8088c90\x2db24c\x2d483d\x2d8865\x2d
>  Oct 03 11:09:54 localhost.localdomain systemd[1]: Dependency failed for
> /home/frank/external.
>  Oct 03 11:09:54 localhost.localdomain systemd[1]: Startup finished in 2.097s (kernel) +
> 1.926s (initrd) + 1min 31.930s (userspace) = 1m
>  Oct 03 11:10:42 localhost.localdomain kernel: usb 2-6: USB disconnect, device number 4
>  Oct 03 11:10:42 localhost.localdomain smartd[433]: Monitoring 1 ATA and 0 SCSI devices
>  Oct 03 11:10:42 localhost.localdomain kernel: sd 4:0:0:0: [sdb] Unhandled error code
>  Oct 03 11:10:42 localhost.localdomain kernel: sd 4:0:0:0: [sdb]
>  Oct 03 11:10:42 localhost.localdomain kernel: Result: hostbyte=DID_NO_CONNECT
> driverbyte=DRIVER_OK
>  Oct 03 11:10:42 localhost.localdomain kernel: sd 4:0:0:0: [sdb] CDB:
>  Oct 03 11:10:42 localhost.localdomain kernel: Read(10): 28 00 00 00 00 00 00 00 08 00
>  Oct 03 11:10:42 localhost.localdomain kernel: end_request: I/O error, dev sdb, sector 0
>  Oct 03 11:10:42 localhost.localdomain kernel: Buffer I/O error on device sdb, logical
> block 0
>  Oct 03 11:10:42 localhost.localdomain kernel: ldm_validate_partition_table(): Disk read
> failed.
>  Oct 03 11:10:42 localhost.localdomain kernel: Dev sdb: unable to read RDB block 0
>  Oct 03 11:10:42 localhost.localdomain kernel:  sdb: unable to read partition table
>  Oct 03 11:10:42 localhost.localdomain kernel: sd 4:0:0:0: [sdb] READ CAPACITY failed
>  Oct 03 11:10:42 localhost.localdomain kernel: sd 4:0:0:0: [sdb]
>  Oct 03 11:10:42 localhost.localdomain kernel: Result: hostbyte=DID_NO_CONNECT
> driverbyte=DRIVER_OK
>  Oct 03 11:10:42 localhost.localdomain kernel: sd 4:0:0:0: [sdb] Sense not available.
>  Oct 03 11:10:42 localhost.localdomain kernel: sd 4:0:0:0: [sdb] Attached SCSI disk
>  Oct 03 11:10:42 localhost.localdomain systemd-udevd[1147]: inotify_add_watch(7, /dev/sdb,
> 10) failed: No such file or directory
>
>  

Anyone has any ideas ?

Thanks

-- 
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democratic governments.