On 7/16/2010 5:54 AM, Ben wrote:
Hi all,
I currently have four drives in my OpenSolaris box. The drives are split into two
mirrors, one mirror containing my rpool (disks 1& 2) and one containing other data
(disks 2& 3).
I'm running out of space on my data mirror and am thinking of upgrading it to
two 2TB disks. I then considered replacing disk 2 with a 2TB disk and making a
RAIDz from the three new drives.
I know this would leave my rpool vulnerable to hard drive failure, but I've got
no data on it that can't be replaced with a reinstall.
Can this be done easily? Or will I have to transfer all of my data to another
machine and build the RAIDz from scratch, then transfer the data back?
Thanks for any advice,
Ben
You can't "convert" a mirror to a RAIDZ directly. In your case,
however, there is a bit of slight-of-hand that can work here.
Assume you have disks A, B, C, D, all the same size, where A & B are
your rpool, and C & D are your datapool:
# zpool detach rpool B
# zpool detach datapool C
# mkfile -n <size of drive B> /foo
# zpool create newpool raidz B C /foo
# zpool offline newpool /foo
# rsync -a /datapool/. /newpool/. (use whichever rsync options fit you
best)
# zpool destroy datapool
# zpool replace newpool /foo D
# rm /foo
During this process, you will have your data on both mirrors exposed to
a disk failure, and when it's complete, the rpool will of course remain
unprotected.
--
Erik Trimble
Java System Support
Mailstop: usca22-123
Phone: x17195
Santa Clara, CA
Timezone: US/Pacific (GMT-0800)
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