Date: Thu, 4 Dec 2014 20:56:42 -0500 From: "David J. Weller-Fahy" <dave+lists.freebsd-questions@caterva.org> To: freebsd-questions@freebsd.org Subject: Problem adding second mirror to zpool Message-ID: <20141205015642.GD29540@weller-fahy.com>
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I just realigned my zpool from ashift=3D9 to ashift=3D12, successfully=20
transmitted the snapshot, and am booting from the new pool... however, I=20
cannot get the last disk added to the pool. Details follow (uname=20
wrapped).
#v+
dave@nastie:~ $ uname -a
FreeBSD nastie.weller-fahy.com 10.1-RELEASE FreeBSD 10.1-RELEASE #0 r274551:
Sun Nov 16 08:06:47 CST 2014
root@nastie.weller-fahy.com:/usr/obj/usr/src/sys/GENERIC amd64
#v-
This machine is a headless NAS, and has been updated since 9.?.
I had a ZFS pool which looked (approximately) like the following (prior=20
to the realignment). Note that the table is from memory, because I=20
didn't keep a screenshot, but the device and partition names and numbers=20
are correct. The disks ada0 and ada2 are 1.5 TiB, and ada1 and ada3 are=20
500 MiB.
#v+
NAME STATE READ WRITE CKSUM
nastiez ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
ada0p3 ONLINE 0 0 0
ada2p3 ONLINE 0 0 0
mirror-1 ONLINE 0 0 0
ada1p1 ONLINE 0 0 0
ada3p1 ONLINE 0 0 0
#v-
I detached ada2p3 and ada3p1 from the pool after scrubbing the pool,=20
then created a new pool with ashift=3D12 with ada2p3 and ada3p1. =20
Following that I had the following zpool status (just the table - these=20
IDs are correct).
#v+
NAME STATE READ WRITE CKSUM
pool ONLINE 0 0 0
gptid/adc0e6d4-78a6-11e4-8646-0014222d98da ONLINE 0 0 0
gptid/c6ede2a4-78a6-11e4-8646-0014222d98da ONLINE 0 0 0
#v-
Now, I transfered the snapshot from nastiez (the old zpool) to pool (the=20
new zpool), verified the transfer, and destroyed the old zpool. Next I=20
duplicated the partition configuration that I used on ada2 and ada3=20
on ada0 and ada1, and started to attach them to the pool.
First I did the following.
#v+
zpool attach pool \
/dev/gptid/adc0e6d4-78a6-11e4-8646-0014222d98da \
/dev/gptid/f0668af9-7aa2-11e4-8452-0014222d98da
#v-
Which made a mirror out of ada1p3 and ada0p3 (first and second,=20
respectively) as shown.
#v+
NAME STATE READ WRITE CKSUM
pool ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
gptid/adc0e6d4-78a6-11e4-8646-0014222d98da ONLINE 0 0 0
gptid/f0668af9-7aa2-11e4-8452-0014222d98da ONLINE 0 0 0
gptid/c6ede2a4-78a6-11e4-8646-0014222d98da ONLINE 0 0 0
#v-
Now I just need to mirror ada3p1 (gptid/c6ede...98da) with ada1p1, and=20
I'll be done. However (command line and error message wrapped)...
#v+
root@nastie:~ # zpool attach pool \
/dev/gptid/c6ede2a4-78a6-11e4-8646-0014222d98da \
/dev/gptid/fadbb43d-7aa2-11e4-8452-0014222d98da
cannot attach /dev/gptid/fadbb43d-7aa2-11e4-8452-0014222d98da to \
/dev/gptid/c6ede2a4-78a6-11e4-8646-0014222d98da: no such device in pool
#v-
I've searched for about 2 days, and have not been able to find anything=20
that either solves my problem or tells me why I can't add this device.
Can anyone tell me how to add the last drive (ada1) without losing the=20
data on the drive? Or is this a situation where I'll need to get a set=20
of larger hard drives to get the data off this pool, and then=20
re-organize after the data is safe?
Regards,
--=20
dave [ please don't CC me ]
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