Re: LibPATA code issues / 2.6.15.4

[Mark Lord]

Justin Piszcz wrote:
> > Using 2.6.16-rc5-git4 and removing a directory of around 5.0GB of 
> > files while streaming a 1MB/s video stream on another (SATA disk), the 
> > I/O seemed to freeze up for a moment and I got this error:
> >
> > [4342671.839000] ata1: command 0x35 timeout, stat 0x50 host_stat 0x22
> >
> > Only 1 in dmesg, any idea what causes this error?
>
> The drive it occured on was a 74GB raptor on an ICH5 controller.
>
> [4294673.245000]   Vendor: ATA       Model: WDC WD740GD-00FL  Rev: 33.0
> 0000:00:1f.2 IDE interface: Intel Corporation 82801EB (ICH5) SATA 
> Controller (rev 02)

SCSI opcode 0x35 is SYNCHRONIZE_CACHE.

Pity we don't know exactly what that got translated to by libata.
It would have been either a FLUSH_CACHE of some kind,
or possibly(?) one of the _FUA_ commands.

Cheers

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