> Peter Tribble wrote:
> Because what you've created is a pool containing two
> components:
> - a 3-drive raidz
> - a 3-drive mirror
> concatenated together.
>
OK. Seems odd that ZFS would allow that (would people want that configuration
instead of what I am attempting to do).
> I think that what you're trying to do based on your description is to create
> one raidz and mirror that to another raidz. (Or create a raidz out of mirrored
> drives.) You can't do that. You can't layer raidz and mirroring.
> You'll either have to use raidz for the lot, or just use mirroring:
> zpool create temparray mirror c1t2d0 c1t4d0 mirror c1t5d0 c1t3d0 mirror
> c1t6d0 c1t8d0
Bummer.
Curiously I can get that same odd size with either of these two commands (the
second attempt sort of looks like it is raid + mirroring):
# zpool create temparray1 mirror c1t2d0 c1t4d0 mirror c1t3d0 c1t5d0 mirror
c1t6d0 c1t8d0
# zpool status
pool: rpool
state: ONLINE
scrub: none requested
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: temparray1
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
temparray1 ONLINE 0 0 0
mirror ONLINE 0 0 0
c1t2d0 ONLINE 0 0 0
c1t4d0 ONLINE 0 0 0
mirror ONLINE 0 0 0
c1t3d0 ONLINE 0 0 0
c1t5d0 ONLINE 0 0 0
mirror ONLINE 0 0 0
c1t6d0 ONLINE 0 0 0
c1t8d0 ONLINE 0 0 0
errors: No known data errors
# zfs list
NAME USED AVAIL REFER MOUNTPOINT
rpool 4.36G 5.42G 35K /rpool
rpool/ROOT 3.09G 5.42G 18K legacy
rpool/ROOT/snv_91 3.09G 5.42G 3.01G /
rpool/ROOT/snv_91/var 84.5M 5.42G 84.5M /var
rpool/dump 640M 5.42G 640M -
rpool/export 14.0M 5.42G 19K /export
rpool/export/home 14.0M 5.42G 14.0M /export/home
rpool/swap 640M 6.05G 16K -
temparray1 92.5K 29.3G 1K /temparray1
# zpool destroy temparray1
And the pretty one:
# zpool create temparray raidz c1t2d0 c1t4d0 raidz c1t3d0 c1t5d0 raidz c1t6d0
c1t8d0
# zpool status
pool: rpool
state: ONLINE
scrub: none requested
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: temparray
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
temparray ONLINE 0 0 0
raidz1 ONLINE 0 0 0
c1t2d0 ONLINE 0 0 0
c1t4d0 ONLINE 0 0 0
raidz1 ONLINE 0 0 0
c1t3d0 ONLINE 0 0 0
c1t5d0 ONLINE 0 0 0
raidz1 ONLINE 0 0 0
c1t6d0 ONLINE 0 0 0
c1t8d0 ONLINE 0 0 0
errors: No known data errors
# zfs list
NAME USED AVAIL REFER MOUNTPOINT
rpool 4.36G 5.42G 35K /rpool
rpool/ROOT 3.09G 5.42G 18K legacy
rpool/ROOT/snv_91 3.09G 5.42G 3.01G /
rpool/ROOT/snv_91/var 84.6M 5.42G 84.6M /var
rpool/dump 640M 5.42G 640M -
rpool/export 14.0M 5.42G 19K /export
rpool/export/home 14.0M 5.42G 14.0M /export/home
rpool/swap 640M 6.05G 16K -
temparray 94K 29.3G 1K /temparray
# zpool destroy temparray
That second attempt leads this newcommer to imagine that they have 3 raid
drives mirrored to 3 raid drives.
Is there a way to get mirror performance (double speed) with raid integrity
(one drive can fail and you are OK)? I can't imagine that there exists no one
who would want that configuration.
Thanks for your comment Peter.
This message posted from opensolaris.org
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
