Date: Thu, 12 May 2022 15:26:52 +0300 From: Christos Chatzaras <chris@cretaforce.gr> To: questions@freebsd.org Subject: Re: ZFS replace a mirrored disk Message-ID: <737C96BC-5778-4994-8657-4359B2C4BC77@cretaforce.gr> In-Reply-To: <45d910fe-6e85-9736-4224-89983a2d8dbd@holgerdanske.com> References: <C46DD702-BED7-466F-986D-289A4A56DC4F@cretaforce.gr> <20220511121422.baddv74m65xsbwmj@x1> <B911CBE8-F384-4E94-99B4-A2D558CB7754@cretaforce.gr> <45d910fe-6e85-9736-4224-89983a2d8dbd@holgerdanske.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Yes this partition layout created by bsdinstall.
----------------------------------
I continue with my tests:
Instead of `dd zero` all the disk, I boot on mfsBSD and clear metadata =
on both swap and zpool:
$> gmirror clear nvd0p2
$> zpool labelclear -f nvd0
$> gpart destroy -F nvd0
Then I boot on main OS and I run:
$> gpart backup nvd1 | gpart restore -F nvd0
$> gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 nvd0
$> gmirror status
Name Status Components
mirror/swap DEGRADED nvd1p2 (ACTIVE)
So the gmirror status is as expected, and I have to forget / insert:
$> gmirror forget swap
$> gmirror insert swap /dev/nvd0p2
And the swap mirror is ready:
$> gmirror status
Name Status Components
mirror/swap COMPLETE nvd1p2 (ACTIVE)
nvd0p2 (ACTIVE)
Now let's see the zpool:
$> zpool status
pool: zroot
state: DEGRADED
status: One or more devices could not be opened. Sufficient replicas =
exist for
the pool to continue functioning in a degraded state.
action: Attach the missing device and online it using 'zpool online'.
see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-2Q
config:
NAME STATE READ WRITE CKSUM
zroot DEGRADED 0 0 0
mirror-0 DEGRADED 0 0 0
nvd0p3 UNAVAIL 0 0 0 cannot open
nvd1p3 ONLINE 0 0 0
errors: No known data errors
I was expecting to asked to run "zpool replace" and not "zpool online", =
but it looks like it thinks it's a temporary error.
$> zpool online zroot nvd0p3
$> zpool status
pool: zroot
state: ONLINE
scan: resilvered 8.93M in 00:00:00 with 0 errors on Thu May 12 =
13:08:12 2022
config:
NAME STATE READ WRITE CKSUM
zroot ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
nvd0p3 ONLINE 0 0 0
nvd1p3 ONLINE 0 0 0
I guess because I didn't `dd zero` resilvering fixes only the blocks =
that are changed, so not many MB.
------------------------------------
I also tried "dd if=3D/dev/zero of=3D/dev/nvd0 bs=3D1M" but when I boot =
on main OS it still show to use "zpool online" instead of "zpool =
replace" :
$> zpool status
pool: zroot
state: DEGRADED
status: One or more devices could not be opened. Sufficient replicas =
exist for
the pool to continue functioning in a degraded state.
action: Attach the missing device and online it using 'zpool online'.
see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-2Q
scan: resilvered 9.14M in 00:00:00 with 0 errors on Thu May 12 =
14:31:40 2022
config:
NAME STATE READ WRITE CKSUM
zroot DEGRADED 0 0 0
mirror-0 DEGRADED 0 0 0
11739263350767631641 UNAVAIL 0 0 0 was =
/dev/nvd0p3
nvd1p3 ONLINE 0 0 0
errors: No known data errors
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?737C96BC-5778-4994-8657-4359B2C4BC77>