On 07 January, 2007 - Dennis Clarke sent me these 6,1K bytes:
> I have a pile of disks hanging off it on two controllers, c0 and c1.
[..]
> Note the complete lack of redundency !
>
> Now then, I have a collection of six disks on controller c0 that I would
> like to now mirror with this ZPool zfs0. Thats the wrong way of thinking
> really. In the SVM world I would create stripes and then mirror them to get
> either RAID 0+1 or RAID 1+0 depending on various factors. With ZFS I am
> more likely to just create the mirrors on day one thus :
>
> # zpool create zfs0 mirror c1t9d0 c0t9d0 mirror c1t10d0 c0t10d0 ... etc
>
> but I don't have that option now. The zpool exists as a simple stripe set
> at the moment. Or some similar analogy of a stripe set in the ZFS world.
[..]
> So I am making a best guess here that what I need is something like this :
>
> # zpool attach zfs0 c1t9d0 c0t9d0
>
> which would mean that the fist disk in my zpool would be mirrored and
> nothing else. A weird config to be sure but .. is this what will happen?
Why not just try it yourself? :)
unterweser:/tmp# mkfile 64m file1a
unterweser:/tmp# mkfile 64m file2a
unterweser:/tmp# mkfile 64m file1b
unterweser:/tmp# mkfile 64m file2b
unterweser:/tmp# zpool create crap /tmp/file1a /tmp/file2a
unterweser:/tmp# zpool attach crap /tmp/file1a /tmp/file1b
unterweser:/tmp# zpool status crap
pool: crap
state: ONLINE
scrub: resilver completed with 0 errors on Mon Jan 8 01:31:07 2007
config:
NAME STATE READ WRITE CKSUM
crap ONLINE 0 0 0
mirror ONLINE 0 0 0
/tmp/file1a ONLINE 0 0 0
/tmp/file1b ONLINE 0 0 0
/tmp/file2a ONLINE 0 0 0
errors: No known data errors
unterweser:/tmp# zpool attach crap /tmp/file2a /tmp/file2b
unterweser:/tmp# zpool status crap
pool: crap
state: ONLINE
scrub: resilver completed with 0 errors on Mon Jan 8 01:31:18 2007
config:
NAME STATE READ WRITE CKSUM
crap ONLINE 0 0 0
mirror ONLINE 0 0 0
/tmp/file1a ONLINE 0 0 0
/tmp/file1b ONLINE 0 0 0
mirror ONLINE 0 0 0
/tmp/file2a ONLINE 0 0 0
/tmp/file2b ONLINE 0 0 0
errors: No known data errors
/Tomas
--
Tomas Ögren, [EMAIL PROTECTED], http://www.acc.umu.se/~stric/
|- Student at Computing Science, University of Umeå
`- Sysadmin at {cs,acc}.umu.se
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