Yeah, what I had been hoping (and to be honest kinda counting on) was that I could do a raidz2 across the 7x250GB drives (which is not actually going to happen since I am going to mirror 2 of them for boot) and then just add another 250GB drive when more space is needed.
Realistically, I am not going to need that functionality right away, but have to admit it was one of the reasons I have been touting ZFS to everyone. Malachi On 4/8/07, Erik Trimble <[EMAIL PROTECTED]> wrote:
Malachi de Ælfweald wrote: > Hmmm... I definitely missed this one... I thought the documentation > said that using zpool attach would add a new drive to the existing > raidz(2) and then it would start resilvering... > > Malachi > The man page is a little unclear. zpool attach is for adding drives to a mirror vdev (or, creating a mirrored vdev from a single drive). It is NOT for use with RAIDZ or RAIDZ2 vdevs (hopefully, in the future...) Also, to be even more clear, the only way to add devices to a zpool with RAIDZ/RAIDZ2 is to add another stripe. Which really isn't adding anything to the RAIDZ vdev. That is, if you have a zpool consisting of a 4-drive RAIDZ, as in: zpool create tank raidz c1t0d0 c1t1d0 c1t2d0 c1t3d0 you can only expand it by adding sufficient disk to create a whole new stripe - so, effectively, your data will be striped between the existing RAIDZ vdev, and the one you add. i.e. zpool add tank raidz c2t0d0 c2t1d0 c2t2d0 c2t3d0 So, if you started out with 4 100GB drives in the above config, you'd have 300GB usable. You'd then have to add 4 more 100GB drives, and the final zpool size would be 600GB, with data in striped across 2 4-drive RAIDZ vdevs. What most people here would prefer is that you could instead (if desired) end up with a single RAIDZ2 vdev of 6 data drives and 2 parity drives, but that is NOT currently possible. -- Erik Trimble Java System Support Mailstop: usca22-123 Phone: x17195 Santa Clara, CA Timezone: US/Pacific (GMT-0800)
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