sata problems

[drew einhorn]

Hi,

I have a Sans Digital TRA4M external 4bay sata drive enclosure.

With a SiL 3132 one lane pci-e adapter.

It connects using a single esata cable, there is a sata port multiplier in
the enclosure

I see lots of people having trouble getting the ubuntu to recognize all the
drives.
I realize the bios reports only one drive, but with a current kernel all the
drives
are accessible.  I can mount filesystems on all the drives.  But if I start
copying
data from one drive to another, the system freezes after about 10 or 20
seconds
and the only way I've found to recover is to reboot the system

Tried again, wanted to look around in /var/log, ran almost a minute before
freezing,
didn't spot anything relevant in /var/log.  Is there an incantation for
turning on more
debugging info in the logs.

The source drive is on half a mdraid mirror from another crashed box.
Should try a healthier source filesystem.

Didn't help tried:  cp -Rx / /mnt/test with /mnt/test mounted on a drive in
the
external box.

Should try another raid controller, but it will be a day or so before I can
scrounge
up a cable with sata on one end and esata on the other.

The controller thats giving me problems is a:

    SiL 3132 SATARaid with bios 7.4.05

        Hmm!!! maybe I should update the bios, but the only linux bios
update utility I can find is about 4 years old.
        I can find a recent DOS update utility, but then I have to find a
dos boot disk, and a floppy drive.

and I'm running on:

    uname -a
    Linux drew-challenge 2.6.32-24-generic #43-Ubuntu SMP Thu Sep 16
14:58:24 UTC 2010 x86_64 GNU/Linux

Any ideas on what I should try next to debug this problem?

-- 
Drew Einhorn

"You can see a lot by just looking."
  --  Yogi Berra
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