Yes that could be a very real possibility.<div><br></div><div>A replacement server is being shipped up tomorrow, so by mid-next week it should be back here in Wellington where it can be better examined...</div><div><br><br>
<div class="gmail_quote">On Thu, Mar 25, 2010 at 10:42 AM, Daniel Reurich <span dir="ltr"><<a href="mailto:daniel@centurion.net.nz">daniel@centurion.net.nz</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Power supply not coping anymore (under spec'd) or mainboard capacitors<br>
popped is my guess.<br>
<div><div></div><div class="h5"><br>
<br>
<br>
On Thu, 2010-03-25 at 07:51 +1300, David Harrison wrote:<br>
> No, but now that you say that if the system is unable to write to the<br>
> RAID5 which contains the log file would this even happen?<br>
><br>
><br>
> e.g. /var is the problematic RAID5 partition and when it locks up it<br>
> takes out one or more of the physical disks.<br>
><br>
><br>
> An interesting observation is that when the problem occurs it either<br>
> locks up both sda & sdb, or sdc by itself.<br>
> I am guessing that this is because sda & sdb are on the same channel,<br>
> so either the channel itself is going or one of the disks is which is<br>
> taking the other with it.<br>
><br>
><br>
><br>
> David<br>
><br>
><br>
><br>
><br>
> On Thu, Mar 25, 2010 at 12:14 AM, Daniel Reurich<br>
> <<a href="mailto:daniel@centurion.net.nz">daniel@centurion.net.nz</a>> wrote:<br>
> Does anything show up in the syslog or dmesg that indicates<br>
> sata i/o<br>
> port resets or anything like that??<br>
><br>
> Daniel Reurich<br>
><br>
><br>
> On Wed, 2010-03-24 at 20:53 +1300, David Harrison wrote:<br>
> > On Wed, Mar 24, 2010 at 6:36 PM, Daniel Pittman<br>
> <<a href="mailto:daniel@rimspace.net">daniel@rimspace.net</a>><br>
> > wrote:<br>
> > David Harrison <<a href="mailto:david.harrison@stress-free.co.nz">david.harrison@stress-free.co.nz</a>><br>
> writes:<br>
> ><br>
> ><br>
> > > I will try the deadline scheduler tonight and see<br>
> if that<br>
> > makes a<br>
> > > difference.<br>
> ><br>
> ><br>
> > You should be able to make the change at run-time,<br>
> through<br>
> > sysfs, I believe.<br>
> > It is a property of the hardware devices, IIRC, in<br>
> sysfs.<br>
> ><br>
> ><br>
> ><br>
> ><br>
> > I tried out a few of the schedulers and none of them helped<br>
> the<br>
> > problem.<br>
> > If anything I'd have to say it got worse.<br>
> ><br>
> ><br>
> > As a final test I have switched to the kernel that was<br>
> installed<br>
> > originally by Ubuntu (2.6.24-24-server).<br>
> > The problem still exists and I know for sure it didn't when<br>
> things<br>
> > were first setup.<br>
> > - There's just no way we could have migrated 400gig of data<br>
> onto the<br>
> > RAID if it was this flakey.<br>
> ><br>
> ><br>
> > Whatever it is is hardware related, and it seems to be<br>
> getting worse<br>
> > over time...<br>
> ><br>
> ><br>
> ><br>
> ><br>
> > David<br>
> ><br>
> ><br>
><br>
> > --<br>
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><br>
><br>
> --<br>
> Daniel Reurich.<br>
><br>
> Centurion Computer Technology (2005) Ltd<br>
> Mobile 021 797 722<br>
><br>
><br>
><br>
><br>
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</div></div></blockquote></div><br></div>