Re: [cobalt-users] Raq4 Raid rebuild

[Bruce Timberlake <bruce@xxxxxxxxxx>]

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> I need to reboot my RAQ4 server but it is doing a backup rebuild
> disk ( raid) . It is now running 24 hrs and I have ony 50% done.
>
> Can I reboot the server during a raid rebuild or should I make sure
> I have an 100% backup disk ?

You can reboot during RAID rebuild...

FYI, if you've installed the latest kernel upgrade, there's a bug 
which makes RAID rebuild take a long time (about 2 days seems to be 
average).  A fixed kernel is in QA, according to a Sun engineer. In 
the meantime, do this as root as a bandaid fix (add to 
/etc/rc.d/rc.local so that it happens each time you reboot the 
server; remove the fix when the new kernel is installed):

echo 5000 > /proc/sys/dev/md/speed-limit

This will slightly increase your server load average while the RAID is 
building, but that's better than taking 2+ days IMO.

- -- 
Bruce Timberlake

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