Re: SATA repeated failure (command 0x35 timeout, status 0xd8)

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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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