On Apr 20, 2010, at 12:13 AM, Sunil <funt...@yahoo.com> wrote:
Hi,
I have a strange requirement. My pool consists of 2 500GB disks in
stripe which I am trying to convert into a RAIDZ setup without data
loss but I have only two additional disks: 750GB and 1TB. So, here
is what I thought:
1. Carve a 500GB slice (A) in 750GB and 2 500GB slices (B,C) in 1TB.
2. Create a RAIDZ pool out of these 3 slices. Performance will be
bad because of seeks in the same disk for B and C but its just
temporary.
3. zfs send | recv my current pool data into the new pool.
4. Destroy the current pool.
5. In the new pool, replace B with the 500GB disk freed by the
destruction of the current pool.
6. Optionally, replace C with second 500GB to free up the 750GB
completely.
So, essentially I have slices out of 3 separate disks giving me my
needed 1TB space. Additional 500GB on the 1TB drive can be used for
scratch non-important data or may be even mirrored with a slice from
750GB disk.
Will this work as I am hoping it should?
Any potential gotchas?
Wouldn't it just be easier to zfs send to a file on the 1TB, build
your raidz, then zfs recv into the new raidz from this file?
-Ross
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