Interesting theory, but no go here.
I just remembered one other thing that may have an impact. I have a
IBM-DTLA-307045 (~45 GB i think) hanging off the same channel as slave.
The thing with that one is that if I try to do a lot of i/o on the
disk..my machine locks up. Hard. alt-sysReq doesn't even work.
I'll try disconnecting that drive when I get a chance but I welcome any
feedback/theories before I get home to do this.
Andrew Morton wrote:
>
> I had the same problem with Seagate ST313021A (13 gig) drives on
> BP6/HPT366/UDMA66. Initial throughput reported by `hdparm -t' was 22
> megs/sec which would slowly wilt to 5 megs/sec.
>
> I discovered that sending _any_ reconfiguration command to the drive -
> even one which was not supported by that particular drive - would bring
> the performance back.
>
> So when it goes slow, try running, say, `hdparm -A1' and see what
> happens.
>
> Andre and I scratched each others heads for a while, suspected a
> firmware bug. He sent an email to a contact at Seagate. This was in
> April, so I guess that person is a very slow typist.
--===================================================================== Mohammad A. Haque http://www.haque.net/ mhaque@haque.net
"Alcohol and calculus don't mix. Project Lead Don't drink and derive." --Unknown http://wm.themes.org/ batmanppc@themes.org ===================================================================== - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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