[mythtv-users] OT Help: mdadm segfault
scram69 at gmail.com
Tue Sep 18 16:40:30 UTC 2007
On 9/17/07, f-myth-users at media.mit.edu <f-myth-users at media.mit.edu> wrote:
> > Date: Mon, 17 Sep 2007 22:22:19 -0700
> > From: "Steve MacLaren" <scram69 at gmail.com>
> > Out of desperation, I even booted off the liveCD, used Synaptic to
> > mdadm in the liveCD environment, and then attempted to assemble the
> > (sudo mdadm --assemble --scan). Exact same result: "md0 assembled
> with 4
> > devices" followed 10 seconds later by a reboot...
> I haven't exactly been following this thread closely, but I suddenly
> had an idea---this smells of a power supply problem.
> Try this hypothesis on for size: Your PSU went marginal, which is
> what caused the original crash. The machine will now stay up as long
> as you -don't- try to pull maximum power. But what happens the
> instant you start trying to assemble your four-disk array? All the
> heads start thrashing around and your drives go to maximum power
> demand, causing your PSU to undervolt just enough to cause the CPU
> to reset.
It hadn't occurred to me, but now that I think about it, it's not all that
far-fetched. I only saw the segfault message once; now that I can reliably
boot on the -15 kernel, it no longer shows up in the message log. I've gone
ahead and ordered a new PSU. In the mean time, I'll try dd'ing each drive
like you mentioned.
Thanks for the suggestions!
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