Date: Wed, 23 Apr 2014 12:01:26 +0200 From: Hugo Lombard <hal@elizium.za.net> To: Gennadiy Gulchin <ggulchin@icloud.com> Cc: FreeBSD Filesystems <freebsd-fs@freebsd.org> Subject: Re: ZFS unable to import pool Message-ID: <20140423100126.GJ2830@sludge.elizium.za.net> In-Reply-To: <20140423091852.GH2830@sludge.elizium.za.net> References: <B493BD80-CDC2-4BA6-AC14-AE16B373A051@icloud.com> <20140423064203.GD2830@sludge.elizium.za.net> <B1024D84-EBBE-4A9B-82C4-5C19B5A66B60@icloud.com> <20140423080056.GE2830@sludge.elizium.za.net> <20140423091852.GH2830@sludge.elizium.za.net>
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Hello
In your original 'zpool import' output, it shows the following:
Additional devices are known to be part of this pool, though their
exact configuration cannot be determined.
I'm thinking your problem might be related to devices that's supposed to
be part of the pool but that's not shown in the import.
For instance, here's my attempt at recreating your scenario:
# zpool import
pool: t
id: 15230454775812525624
state: DEGRADED
status: One or more devices are missing from the system.
action: The pool can be imported despite missing or damaged devices. The
fault tolerance of the pool may be compromised if imported.
see: http://illumos.org/msg/ZFS-8000-2Q
config:
t DEGRADED
raidz1-0 DEGRADED
md3 ONLINE
md4 ONLINE
md5 ONLINE
md6 ONLINE
3421664295019948379 UNAVAIL cannot open
cache
md1s2
logs
md1s1 ONLINE
#
As you can see, the pool stattus is 'DEGRADED' instead of 'UNAVAIL', and
I don't have the 'Additional devices...' message.
The pool imports OK:
# zpool import t
# zpool status t
pool: t
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: http://illumos.org/msg/ZFS-8000-2Q
scan: none requested
config:
NAME STATE READ WRITE CKSUM
t DEGRADED 0 0 0
raidz1-0 DEGRADED 0 0 0
md3 ONLINE 0 0 0
md4 ONLINE 0 0 0
md5 ONLINE 0 0 0
md6 ONLINE 0 0 0
3421664295019948379 UNAVAIL 0 0 0 was /dev/md7
logs
md1s1 ONLINE 0 0 0
cache
md1s2 ONLINE 0 0 0
errors: No known data errors
#
As a further test, let's see what happens when the cache disk
disappears:
# zpool export t
# gpart delete -i 2 md1
md1s2 deleted
# zpool import
pool: t
id: 15230454775812525624
state: DEGRADED
status: One or more devices are missing from the system.
action: The pool can be imported despite missing or damaged devices. The
fault tolerance of the pool may be compromised if imported.
see: http://illumos.org/msg/ZFS-8000-2Q
config:
t DEGRADED
raidz1-0 DEGRADED
md3 ONLINE
md4 ONLINE
md5 ONLINE
md6 ONLINE
3421664295019948379 UNAVAIL cannot open
cache
7736388725784014558
logs
md1s1 ONLINE
# zpool import t
# zpool status t
pool: t
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: http://illumos.org/msg/ZFS-8000-2Q
scan: none requested
config:
NAME STATE READ WRITE CKSUM
t DEGRADED 0 0 0
raidz1-0 DEGRADED 0 0 0
md3 ONLINE 0 0 0
md4 ONLINE 0 0 0
md5 ONLINE 0 0 0
md6 ONLINE 0 0 0
3421664295019948379 UNAVAIL 0 0 0 was /dev/md7
logs
md1s1 ONLINE 0 0 0
cache
7736388725784014558 UNAVAIL 0 0 0 was /dev/md1s2
errors: No known data errors
#
So even with a missing raidz component and a missing cache device, the
pool still imports.
I think some crucial piece of information is missing to complete the
picture.
--
Hugo Lombard
.___.
(o,o)
/) )
---"-"---
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