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SubjectRe: SATA repeated failure (command 0x35 timeout, status 0xd8)
Molle Bestefich wrote:
[--snip--]
> The above repeats itself thru modes UDMA/66, UDMA/44, UDMA/33,
> UDMA/25, UDMA/16, PIO4, PIO3, PIO1 and PIO0.

Can you full dmesg for this? Preferably w/ timestamp?

> At which point /dev/sdb disappears completely, only to reappear as
> /dev/sdh:
> ===============
> SCSI device sdh: 398297088 512-byte hdwr sectors (203928 MB)
> sdh: Write Protect is off
> sdh: Mode Sense: 00 3a 00 00
> SCSI device sdh: drive cache: write back
> SCSI device sdh: 398297088 512-byte hdwr sectors (203928 MB)
> sdh: Write Protect is off
> sdh: Mode Sense: 00 3a 00 00
> SCSI device sdh: drive cache: write back
> ===============
>
> (Odd.)
>
> I don't get why PowerMax works this drive just fine while Linux
> doesn't. Perhaps because PowerMax only uses SMART commands and
> doesn't transfer data over the SATA bus?
>
> Anyway, with the device now failing fairly consistently, I guess I
> should begin moving around cables, controllers, disks etc. again. I'm
> very worried about doing this though, since I'm pretty sure that it'll
> break the MD array on the disks very quickly..

Your problem seems to be hardware transmission error. I don't know what
a powermax is and doesn't know what it does, so you'll have to play the
swap-and-see-what-breaks game to figure out the problematic part.

Thanks.

--
tejun
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