I have seen a similar issue with my up to date feisty installation. AMD64 and two SATA drives. the problem appears to be with a new 250GB Maxtor. An older 80GB Samsung Spinpoint seems OK.
uname = Linux kryton 2.6.20-5-generic #2 SMP Sat Jan 6 09:44:32 UTC 2007 x86_64 GNU/Linux dmesg = [ 1410.976979] SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 1419.402905] ata1.00: limiting speed to PIO0 [ 1419.402910] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen [ 1419.402917] ata1.00: cmd 20/00:68:86:20:6f/00:00:00:00:00/e2 tag 0 cdb 0x0 data 53248 in [ 1419.402919] res 50/01:01:01:00:00/01:00:00:00:00/00 Emask 0x202 (HSM violation) I also get [ 236.863319] ata1.00: limiting speed to UDMA/100 [ 236.863323] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen [ 236.863580] ata1.00: cmd ca/00:08:76:3a:b0/00:00:00:00:00/e3 tag 0 cdb 0x0 data 4096 out [ 236.863582] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) [ 236.863909] ata1: soft resetting port [ 237.035354] ata1.00: configured for UDMA/100 -- Hard disk I/O randomly freezes when hald is running and optical drive is empty https://launchpad.net/bugs/84603 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
