Fedora 7 - System lockup

[Jeffrey Ross]

The system has locked up twice since yesterday afternoon.  The same 
hardware was running FC6 x86_64 for months without a problem.

I am now running the i386 version of Fedora and have noticed the 
following errors in my logs:

Jun  1 20:27:03 wisdom kernel: ata7.01: exception Emask 0x0 SAct 0x0 
SErr 0x0 action 0x2 frozen
Jun  1 20:27:03 wisdom kernel: ata7.01: cmd 
a0/00:00:00:00:20/00:00:00:00:00/b0 tag 0 cdb 0x0 data 0
Jun  1 20:27:03 wisdom kernel:          res 
40/00:03:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
Jun  1 20:27:03 wisdom kernel: BAR5:00:00 01:7F 02:22 03:CA 04:00 05:00 
06:00 07:00 08:00 09:00 0A:00 0B:00 0C:01 0D:00 0E:00 0F:00
Jun  1 20:27:03 wisdom kernel: ata7: soft resetting port
Jun  1 20:27:04 wisdom kernel: ata7.00: configured for UDMA/33
Jun  1 20:27:04 wisdom kernel: ata7.01: configured for MWDMA2
Jun  1 20:27:04 wisdom kernel: ata7: EH complete