Date: Thu, 27 Jun 2013 12:07:50 -0300 From: Alexandre Biancalana <biancalana@gmail.com> To: freebsd-fs@freebsd.org Subject: ZFS mount volume freeze Message-ID: <CAGF-nS7ugEow5Qx3gbRT90VO9DeGGxz8t3Q%2B%2Bd1smoCsp4emGw@mail.gmail.com>
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Hi list,
I'm using FreeBSD-8.3-RELEASE-p7 amd64, actually this is a FreeNAS
8.3.1-RELEASE but everything described here were also tested booting
machine with a usb memstick using
FreeBSD-10.0-CURRENT-amd64-20130623-r252101-memstick image with the same
results.
I've a home file server where I store my personal files, backups and
virtual machine images served through nfs to a XCP. Yesterday my VMs
stopped and all commands (ls, find) issued to the VMs volume (through NFS
or local on fileserver) started to freeze hanging forever.
Then I reboot the machine and it starts to hang after zpool import and
before volumes get mounted. This machine has 8GB RAM and AMD Bulldozer
six-core CPU.
I have two zpool:
$ zpool status
pool: datastore0
state: ONLINE
scan: resilvered 834G in 41h27m with 0 errors on Fri Jun 14 15:59:54 2013
config:
NAME STATE READ
WRITE CKSUM
datastore0 ONLINE 0
0 0
mirror-0 ONLINE 0
0 0
gptid/d761e927-d2e2-11e2-bddc-902b34f47b09 ONLINE 0
0 0
gptid/daa3440d-d3c8-11e2-8405-902b34f47b09 ONLINE 0
0 0
errors: No known data errors
pool: datastore1
state: ONLINE
scan: scrub repaired 1.63G in 1h47m with 0 errors on Thu Jun 27 01:06:59
2013
config:
NAME STATE READ WRITE
CKSUM
datastore1 ONLINE 0
0 0
mirror-0 ONLINE 0
0 0
ada2 ONLINE 0
0 0
ada4 ONLINE 0
0 0
logs
gptid/74f920fd-d301-11e2-8405-902b34f47b09 ONLINE 0
0 0
errors: No known data errors
$ zfs list
NAME USED AVAIL REFER MOUNTPOINT
datastore0 1.21T 33.7G 2.12M /mnt/datastore0
datastore0/ale 534G 33.7G 9.10G /mnt/datastore0/ale
datastore0/ale/backup 525G 33.7G 143G
/mnt/datastore0/ale/backup
datastore0/forensics 42.1G 33.7G 42.1G
/mnt/datastore0/forensics
datastore0/jail_plugins 1.54G 593M 1.42G
/mnt/datastore0/jail_plugins
datastore0/jail_plugins_archive 278M 746M 278M
/mnt/datastore0/jail_plugins_archive
datastore0/mirror 520G 33.7G 387G /mnt/datastore0/mirror
datastore1 291G 171G 2.29M /datastore1
datastore1/iso 51.1G 28.9G 51.1G /tmp/iso
datastore1/vms 238G 144G 55.6G /datastore1/vms
datastore0 => mirror 2 1TB SATA
datastore1 => mirror 2 500G SATA
So I boot in single mode and can successfully import both pools, datastore0
is working perfectly I can mount all their volumes and access all data
without any problem.
The problem is with a specify volume where I store the VM files is located
in datastore1/vms, when I try to mount this volume, no matter if I try todo
zfs mount -a or zfs mount datastore1/vms the command hangs forever. I've
another volume in that zpool (datastore1/iso) that I can mount and use
without any problem.
I already tried to do a scrub, that corrected some data but even after that
I can mount that volume.
Now I'm with the machine online with all volume mounted but datastore1/vms
and waiting a zdb datastore1 to finish, (I can provide the cmd output too).
How this machine is my home file server I'm free to do almost everything to
troubleshoot that.
Any ideas on how troubleshoot that further ?
Regards,
Alexandre
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