System Administration

Re: Ignite build spare drives while system running

 
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David G Ledger
Occasional Advisor

Ignite build spare drives while system running

Is it still possible to use Ignite to build a new disc from an Ignite backup while the system is running normally?

We have a vg00 disc drive problem and if we can build a replacement mirrored pair without booting from tape or net we will only need a reboot, not longer downtime, to swap the drives out.

In the early days this could be done, because you could build atlernate boot discs with a different rev OS without bringing the system down.
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melvyn burnard
Honored Contributor

Re: Ignite build spare drives while system running

Which OS \re you running?
If you had 11.23 you can get DRD for this and use that.
My house is the bank's, my money the wife's, But my opinions belong to me, not HP!
David G Ledger
Occasional Advisor

Re: Ignite build spare drives while system running

It's running 11.11
likid0
Honored Contributor

Re: Ignite build spare drives while system running

What you are asking for is DrD, but its only avalilable for 11.23 onwards, if your lvols are still ok, and u have a mirror license, you can allways mkboot and mirror another disk, and boot from it.
Windows?, no thanks
Steven E. Protter
Exalted Contributor
Solution

Re: Ignite build spare drives while system running

Shalom,

If you have mirrored correctly to a second disk you can rebuild your mirrors without taking down the system.

You don't need to use your Ignite restore at all.

All you need to do depening on the bad drive's state is:

lvextend -m 0 or lvsplit the logical volumes essentially breaking the mirrors,

Replace the drive.

pvcreate and rebuild the mirrors.

http://www.hpux.ws/?p=21

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Steven E Protter
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David G Ledger
Occasional Advisor

Re: Ignite build spare drives while system running

Unfortunately our lvols are not ok. We have three single 8MB extent holes. c3t6d0 has three stale extents, which presumably means that c0t6d0 is unreadable within each of those extents.

A dd to /dev/null of the c3 drive is ok. No errors. A dd of the c0 drive is still 'running' after a day and a half. It's an unkillable process, so it's in the depths of a read system call that never returns.

Syslog records no errors other than the stale extents.

That's why I was hoping to build replacement drives with Ignite and only bring the server down for long enough to swap them over.