RE: [cobalt-users] Can I turn a Raq4i into a RaQ4r?

["Jeff Edwards" <jeff.edwards@xxxxxxxxx>]

I can't think of anything else that would be affected, other than
performance.

The only problem I can dream up is as follows:

The first drive (Near the RAM) is the Main Drive, the second drive is the
one being re-mirrored each time. The extra reading, writing, re-formatting
is unnecessary wear & tear on both drives.

If the Main Drive Dies 5 minutes after a reboot, You lose the whole server
because the 2nd. Drive is going to have an incomplete data set. The mirror
process first wipes the 2nd. drive clean (Maybe a quick format) and then
starts to copy the drive data from the main drive.

Still Kinda Risky for a Production Server!

30 minutes rebuild time is pretty quick, I have a 512mb, dual 45gb Drive Raq
4r and it takes a little more then an hour to do a rebuild. Are you using
20gb drives?

Jeff


-----Original Message-----
From: cobalt-users-admin@xxxxxxxxxxxxxxx
[mailto:cobalt-users-admin@xxxxxxxxxxxxxxx]On Behalf Of Robert
Fitzpatrick
Sent: Monday, March 25, 2002 6:46 PM
To: cobalt-users@xxxxxxxxxxxxxxx
Subject: RE: [cobalt-users] Can I turn a Raq4i into a RaQ4r?


>
> Robert,  I'd be interested in knowing if your Raq4r rebuilds the
mirror
> after every reboot.
>

Yes it does, I was wondering why. It takes about 30 minutes after
reboot to completely mirror the drives. I don't mind because I never
reboot, except maybe after hours when working on something. But I have
a backup RaQ on which everything is tested before it touches the
production RaQ. So I can easily schedule anything that will require
reboot after hours. My concern is - does the mirroring after reboot
effect anything else?

--
Robert

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