Since the rpool is created by default as a single drive and also it is
different from additional pools in that it cannot be an EFI file system then the
"attach" option is how you add the mirror as discussed in earlier e-mail. The
additional pool consists of 5 mirrored pairs constructed how you stated
below. The OS rpool is different from non OS pools.
xxx:/var/tmp ->zpool status
pool: rpool
state: ONLINE
scrub: scrub completed after 0h13m with 0 errors on Sun Jul 11 00:18:28 2010
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
mirror ONLINE 0 0 0
c1t0d0s0 ONLINE 0 0 0
c1t1d0s0 ONLINE 0 0 0
errors: No known data errors
pool: pool
state: ONLINE
scrub: scrub completed after 2h20m with 0 errors on Sun Jul 11 02:20:17 2010
config:
NAME STATE READ WRITE CKSUM
pool ONLINE 0 0 0
mirror ONLINE 0 0 0
c5t4d5 ONLINE 0 0 0
c2t4d5 ONLINE 0 0 0
mirror ONLINE 0 0 0
c3t1d4 ONLINE 0 0 0
c4t1d4 ONLINE 0 0 0
mirror ONLINE 0 0 0
c5t4d3 ONLINE 0 0 0
c2t4d0 ONLINE 0 0 0
mirror ONLINE 0 0 0
c5t4d1 ONLINE 0 0 0
c2t4d2 ONLINE 0 0 0
mirror ONLINE 0 0 0
c3t1d2 ONLINE 0 0 0
c4t1d3 ONLINE 0 0 0
mirror ONLINE 0 0 0
c3t1d0 ONLINE 0 0 0
c4t1d1 ONLINE 0 0 0
errors: No known data errors
Cia Watson wrote, On 07/12/10 18:46:
I'm not a master, but... I've spent a good deal of time in the last few weeks
(particularly this past weekend) trying to figure out ZFS. I actually think I
have a pretty good handle on it, though not a lot of real practice yet. :-)
The previous suggestion to attach the 2nd drive seems to me that it would just
increase the size of the pool but not necessarily create a mirror. Of course
what the man pages say and how things work 'in real life' may be a bit
different. And part of it may depend on how much data you have, etc. So from
the man page on zpool I just grepped mirror, and here's a couple of examples:
The following command creates a pool with two mirrors, where each mirror
contains two disks.
# zpool create tank mirror c0t0d0 c0t1d0 mirror c0t2d0 c0t3d0
The following command adds two mirrored disks to the pool
# zpool add tank mirror c1t0d0 c1t1d0
And this looks like it creates a single mirror with a spare:
# zpool create tank mirror c0t0d0 c0t1d0 spare c0t2d0
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