F19 Disc Chundering

[Jonathan Allen]

All,

Having just installed F19 on a new mcahine, the disc keeps makeing 'reset'
noises and puts this in /var/log/messages:

Jul 30 18:58:38 brush kernel: [ 3538.326082] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
Jul 30 18:58:38 brush kernel: [ 3538.326098] sr 3:0:0:0: CDB:
Jul 30 18:58:38 brush kernel: [ 3538.326102] Get event status notification: 4a 01 00 00 10 00 00 00 08 00
Jul 30 18:58:38 brush kernel: [ 3538.326123] ata4.00: cmd a0/00:00:00:08:00/00:00:00:00:00/a0 tag 0 pio 16392 in
Jul 30 18:58:38 brush kernel: [ 3538.326123]          res 40/00:03:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
Jul 30 18:58:38 brush kernel: [ 3538.326129] ata4.00: status: { DRDY }
Jul 30 18:58:38 brush kernel: [ 3538.326139] ata4: hard resetting link
Jul 30 18:58:38 brush kernel: [ 3538.989992] ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
Jul 30 18:58:38 brush kernel: [ 3539.007104] ata4.00: configured for PIO0
Jul 30 18:58:38 brush kernel: [ 3539.022994] ata4: EH complete

This happens about every 30 seconds.  Any idea what is going on?

Jonathan