* On 07 Apr 2009, Michael Shadle wrote:
>
> Now quick question - if I have a raidz2 named 'tank' already I can
> expand the pool by doing:
>
> zpool attach tank raidz2 device1 device2 device3 ... device7
>
> It will make 'tank' larger and each group of disks (vdev? or zdev?)
> will be dual parity. It won't create a mirror, will it?
That's correct.
Anything you're unsure about, you can test. Just create a zpool using
files instead of devices:
for i in 1 2 3 4; do
mkfile 256m /tmp/file$i
done
zpool create testpool raidz /tmp/file1 /tmp/file2 /tmp/file3 /tmp/file4
...and experiment on that. No data risk this way.
--
-D. d...@uchicago.edu NSIT University of Chicago
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