On Mon, 5 Sep 2005, David Kelly wrote:
I had a very similar problem a while back. After replacing the drive in
question, then replacing the motherboard, I discovered it was a power
issue. The power supply was freaking out at medium to high loads, which
was causing the device to continually reset.
On Sep 5, 2005, at 1:56 PM, Michael Abbott wrote:
Well, I hope that's not it. I'm encouraged to think not:
Yeah But... Power supplies wear out. Particularly the capacitors.
I have seen every single component replaced in denial that the problem could
be related to the power supply. Then the PS was finally replaced because it
was the only thing which had not. And the problem was the PS all along.
Well, I do have another reason for thinking that it's nothing to do with
the power supply: a bit of history I didn't mention (because it's long
and not particularly interesting).
When I first installed this machine (a bit over three years ago) I used
the offending disk together with another disk of the same model. I first
used the motherboard hardware RAID (using striping for speed, more fool
me) on the motherboard and installed FreeBSD. It broke, really quite
quickly (within a week or so).
I blamed the RAID controller and tried again, this time using vinum. The
system survived quite a bit longer (can't remember how long, a month or so
maybe), but suddenly failed quite horribly: I lost all data. I retired
the two disks and started again, and the resulting system has run sweetly
for three years.
Recently I brought the two disks out of retirement, and one of them seems
most unhappy (as described). I'm strongly persuaded (convinced, even)
that that one disk is dodgy. I think I'm going to have to bin it, unless
somebody can come up with a way to reliably molycoddle it.
I still think the question: "why does FreeBSD hang?" is interesting.
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