I have same freezes when access to disk.
All operations needings acces to disk are temporary freezed.
karmic 9.10
Linux 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 16:20:31 UTC 2009.
Dec 21 15:10:12 my2912071352 kernel: [24380.365200] ata1.01: qc timeout (cmd
0xa0)
Dec 21 15:10:12 my2912071352 kernel: [24380.365222] ata1.01: exception Emask
0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
Dec 21 15:10:12 my2912071352 kernel: [24380.365243] ata1.01: cmd
a0/00:00:00:00:00/00:00:00:00:00/b0 tag 0
Dec 21 15:10:12 my2912071352 kernel: [24380.365246] cdb 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00
Dec 21 15:10:12 my2912071352 kernel: [24380.365249] res
51/20:03:00:00:00/00:00:00:00:00/b0 Emask 0x5 (timeout)
Dec 21 15:10:12 my2912071352 kernel: [24380.365256] ata1.01: status: { DRDY ERR
}
Dec 21 15:10:17 my2912071352 kernel: [24385.408044] ata1: link is slow to
respond, please be patient (ready=0)
Dec 21 15:10:22 my2912071352 kernel: [24390.393048] ata1: device not ready
(errno=-16), forcing hardreset
Dec 21 15:10:22 my2912071352 kernel: [24390.393064] ata1: soft resetting link
Dec 21 15:10:22 my2912071352 kernel: [24390.656494] ata1.00: configured for
UDMA/100
Dec 21 15:10:22 my2912071352 kernel: [24390.695598] ata1.01: configured for PIO0
Dec 21 15:10:22 my2912071352 kernel: [24390.704463] ata1: EH complete
--
Regression Sata hard disk unable to mount after upgrade 2.6.27 generic kernel
https://bugs.launchpad.net/bugs/279693
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