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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> mythtv-users-bounces@mythtv.org
[mailto:mythtv-users-bounces@mythtv.org] <b>On Behalf Of </b>Steve MacLaren<br>
<b>Sent:</b> Tuesday, September 18, 2007 1:22 AM<br>
<b>To:</b> Discussion about mythtv<br>
<b>Subject:</b> Re: [mythtv-users] OT Help: mdadm segfault<o:p></o:p></span></p>
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<p class=MsoNormal><span class=gmailquote>On 9/17/07, <b>Steve MacLaren</b>
<<a href="mailto:scram69@gmail.com">scram69@gmail.com</a>> wrote:</span><o:p></o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p>
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<p class=MsoNormal><span class=gmailquote>On 9/17/07, <b>John Drescher</b> <<a
href="mailto:drescherjm@gmail.com" target="_blank"> drescherjm@gmail.com</a>>
wrote:</span><span class=q><o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>> Sadly, I got the same
"/dev/sd* has no superblock" regardless of which drive<br>
> I put first in the list. So all 4 drives failed simultaneously?<br>
><br>
You want to put all 4 drives with the correct partition. Are you sure <br>
it is /dev/sda and not /dev/sda1?<o:p></o:p></p>
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<p class=MsoNormal>Oops, I guess the right partition is important...<br>
<br>
This time mdadm --assemble /dev/.static/dev/md0 /dev/sd*1 resulted in something
like:<br>
"md0 assembled with 4 devices" <br>
However, I don't get long to savor my success, because the machine reboots
within about 10 seconds of successfully assembling the raid array. I
tried to assemble again after the reboot, and got the same exact results - I
don't even get enough time to type a mount command. <br>
<br>
I guess this explains the continuous reboot loop I wound up in earlier.
What is it about just assembling an array that would cause a reboot?<o:p></o:p></p>
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<p class=MsoNormal>Out of desperation, I even booted off the liveCD, used
Synaptic to install mdadm in the liveCD environment, and then attempted to
assemble the array (sudo mdadm --assemble --scan). Exact same result:
"md0 assembled with 4 devices" followed 10 seconds later by a
reboot... <o:p></o:p></p>
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color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>This sounds good but it also sounds too good. Hoping it is
correct.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I had an issue with the PSU in my system always causing one
drive to lose power leaving my RAID5 in a degraded state.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Athlon64 with 6 HDD (2 in RAID1, 4 in RAID5) a CD Rom drive and 5
AGP/PCI devices (1 video card and 5 capture cards(one PVR-500)) all running off
a 550watt PSU.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Installed an 800Watter and my issue went away.. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Yours however sounds very different. While the explanation
sounds good I have never seen it happen myself.. and the fact that in my
situation it didn’t do the same thing makes me a sceptic.. thou it might be due
to the fact that I had a modular PSU in the system so that, maybe, only one
rail fell below the limit and only dropped that one drive.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I’m hoping I’m wrong but still.. And MDADM seg faulting is a
little weird…<o:p></o:p></span></p>
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