Chuck Ebbert wrote:
> From:
> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=245512
> 
> 
> The following error consistently appears at apparently random intervals in 
> syslog:
> 
> kernel: ata1.00: exception Emask 0x2 SAct 0x1001 SErr 0x0 action 0x2 frozen
> kernel: ata1.00: (spurious completions during NCQ issue=0x0 SAct=0x1001
> FIS=004040a1:00000800)
> kernel: ata1.00: cmd 61/08:00:39:2b:cc/00:00:08:00:00/40 tag 0 cdb 0x0 data 
> 4096 out
> kernel:          res 40/00:00:39:2b:cc/00:00:08:00:00/40 Emask 0x2 (HSM 
> violation)
> kernel: ata1.00: cmd 61/08:60:e1:2b:cc/00:00:08:00:00/40 tag 12 cdb 0x0 data
> 4096 out
> kernel:          res 40/00:00:39:2b:cc/00:00:08:00:00/40 Emask 0x2 (HSM 
> violation)
> 
> Controller is ATI SB600 using the AHCI driver.
> 64-bit DMA is disabled.
> Disk is:
> ata1.00: ATA-7: ST3160812AS, 3.ADJ, max UDMA/133
> 
> 
> Can't we just turn off NCQ automatically when this happens?

After sever such occasions, NCQ will be turned off automatically.
Hmm... It's a bit surprising to see this on a Seagate drive tho.  Can
someone crosscheck this by attaching the drive to an intel ahci?

-- 
tejun
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