> Just a data point -- our netapp filer actually creates additional raid
> groups that are added to the greater pool when you "add disks", much
> as zfs does now.  They aren't simply used to expand the one large raid
> group of the volume.  I've been meaning to rebuild the whole thing to
> get use of the multiple parity disks back.

That should be a setting, though.  Not a limitation.

Netapp will create a new raid group when all existing groups are at a
particular point.  That way the raid groups don't become too large.
Otherwise, it can expand the group.

Today, ZFS doesn't have that option.

> Ours is a few years old and isn't running the latest software rev, so
> maybe they've overcome this now, but thought I'd mention it.

This isn't a new feature.  Back in the "old days"(TM), there was only
one volume and one raid group on a head.  So adding disks to a volume
required the raid group be expanded onto the disks.


-- 
Darren Dunham                                           [EMAIL PROTECTED]
Senior Technical Consultant         TAOS            http://www.taos.com/
Got some Dr Pepper?                           San Francisco, CA bay area
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