Thread-topic: Q about SoftRAID 3 & splitting mirrors as part of a backup strategy
User-agent: Microsoft-Entourage/11.3.6.070618
> From reading, it seems that Apple's RAID
> software doesn't allow for splitting a mirror.
Apple's software RAID solution does allow you to split a mirror. See
Apple's docs or check out this article for a quick intro to AppleRAID 2:
<http://www.afp548.com/article.php?story=AppleRAID2-in-Depth>
> 1) When a mirror is split, are both halves mountable and, if so,
> what are their volume names?
Yes, they are mountable. Actually, SoftRAID gives you a few options for how
the split mirror will work, e.g. non-RAID or a read-only secondary volume.
> 2) Is there a command-line tool for splitting the mirror, so that it
> can be used in a script like I envision for my pre- and post-backup
> script?
I'm not sure. Check with the SoftRAID guys for more info.
>
> If anything does something similar to what I would like to do, could
> you please let me know if it is a workable idea? Thanks.
What you're describing is a really common use of RAID 1. I recommend
testing your plan using Apple's RAID 2 and a demo copy of SoftRAID to see
which you like better. You should be able to test either solution on a
regular MOSX client machine if you don't have a MOSXS test machine
available. I imagine you'll find Apple's solution to be more easily
scripted.
-Oliver
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