Gregory Shaw wrote:
On Tue, 2006-06-27 at 09:09 +1000, Nathan Kroenert wrote:
How would ZFS self heal in this case?
>
You're using hardware raid. The hardware raid controller will rebuild
the volume in the event of a single drive failure. You'd need to keep
on top of it, but that's a given in the case of either hardware or
software raid.
If you've got requirements for surviving an array failure, the
recommended solution in that case is to mirror between volumes on
multiple arrays. I've always liked software raid (mirroring) in that
case, as no manual intervention is needed in the event of an array
failure. Mirroring between discrete arrays is usually reserved for
mission-critical applications that cost thousands of dollars per hour in
downtime.
In other words, it won't. You've spent the disk space, but
because you're mirroring in the wrong place (the raid array)
all ZFS can do is tell you that your data is gone. With luck,
subsequent reads _might_ get the right data, but maybe not.
- Bart
--
Bart Smaalders Solaris Kernel Performance
[EMAIL PROTECTED] http://blogs.sun.com/barts
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