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#1 2016-04-30 22:40:09
- JoKoT3
- Member
- Registered: 2013-04-23
- Posts: 3
zfs mount gives EPERM
Hi,
I'm facing an issue with zfs, I'm unable to mount one filesystem and I don't get why.
I'm using the following version :
zfs-linux 0.6.5.6_4.5.1_1-5 (and dependencies) from archzfs-linux repository
linux 4.5.1-1
I have one pool :
NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT
tank 6.34T 4.04T 2.30T - 3% 63% 1.00x ONLINE -that is online and healthy :
pool: tank
state: ONLINE
scan: scrub repaired 0 in 35h47m with 0 errors on Tue Apr 26 12:24:15 2016
config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
raidz1-0 ONLINE 0 0 0
ata-SAMSUNG_HD204UI_S2H7J90B615388-part1 ONLINE 0 0 0
ata-WDC_WD20EZRX-00DC0B0_WD-WMC301615003-part1 ONLINE 0 0 0
ata-WDC_WD20EZRX-00DC0B0_WD-WMC1T3122977-part1 ONLINE 0 0 0
ata-ST1000DM005_HD103SJ_S246JX0CB01166-part1 ONLINE 0 0 0
raidz1-1 ONLINE 0 0 0
ata-SAMSUNG_HD204UI_S2H7J90B615388-part2 ONLINE 0 0 0
ata-WDC_WD20EZRX-00DC0B0_WD-WMC301615003-part2 ONLINE 0 0 0
ata-WDC_WD20EZRX-00DC0B0_WD-WMC1T3122977-part2 ONLINE 0 0 0
errors: No known data errorsIn this pool there is 2 filesystems :
NAME USED AVAIL REFER MOUNTPOINT
tank 2.83T 1.47T 145K /tank
tank/media 2.83T 1.47T 2.83T /tank/mediabut only tank is mounted. I can't mount the second one "tank/media".
the mount command gives :
# zfs mount tank/media
filesystem 'tank/media' can not be mounted due to error 1
cannot mount 'tank/media': Invalid argumentI straced the command and it show an EPERM error on the mount command
[pid 3548] mount("tank/media", "/tank/media", "zfs", MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_MANDLOCK|MS_NOATIME, "rw,noatime,nodev,noexec,nosuid,m"...) = -1 EPERM (Operation not permitted)The issue appeared very recently, but I don't recall a particular change that could cause such issue.
I tried the following :
- make sure "canmount" was "on" on the filesystem
- unmount / mount all zfs filesystems (zfs umount -a ; zfs mount -a)
- regenerate zpool.cache (zpool set cachefile=/etc/zfs/zpool.cache tank)
- reboot.
- try both zfs-linux and zfs-linux-git packages
- make sure no process were using /tank/media (lsof | grep media), and disabled any service that may use this directory (kodi and deluged)
the filesystems configuration :
# zfs get all
NAME PROPERTY VALUE SOURCE
tank type filesystem -
tank creation Sat Jul 13 20:19 2013 -
tank used 2.83T -
tank available 1.47T -
tank referenced 145K -
tank compressratio 1.00x -
tank mounted yes -
tank quota none default
tank reservation none default
tank recordsize 128K default
tank mountpoint /tank default
tank sharenfs off local
tank checksum on default
tank compression off default
tank atime on default
tank devices on default
tank exec on default
tank setuid on default
tank readonly off default
tank zoned off default
tank snapdir hidden default
tank aclinherit restricted default
tank canmount on default
tank xattr on default
tank copies 1 default
tank version 5 -
tank utf8only off -
tank normalization none -
tank casesensitivity sensitive -
tank vscan off default
tank nbmand off default
tank sharesmb off default
tank refquota none default
tank refreservation none default
tank primarycache all default
tank secondarycache all default
tank usedbysnapshots 0 -
tank usedbydataset 145K -
tank usedbychildren 2.83T -
tank usedbyrefreservation 0 -
tank logbias latency default
tank dedup off default
tank mlslabel none default
tank sync standard default
tank refcompressratio 1.00x -
tank written 145K -
tank logicalused 2.85T -
tank logicalreferenced 35K -
tank filesystem_limit none default
tank snapshot_limit none default
tank filesystem_count none default
tank snapshot_count none default
tank snapdev hidden default
tank acltype off default
tank context none default
tank fscontext none default
tank defcontext none default
tank rootcontext none default
tank relatime on temporary
tank redundant_metadata all default
tank overlay off default
tank/media type filesystem -
tank/media creation Sun Jul 14 5:44 2013 -
tank/media used 2.83T -
tank/media available 1.47T -
tank/media referenced 2.83T -
tank/media compressratio 1.00x -
tank/media mounted no -
tank/media quota none default
tank/media reservation none default
tank/media recordsize 128K default
tank/media mountpoint /tank/media default
tank/media sharenfs off local
tank/media checksum on default
tank/media compression lzjb local
tank/media atime off local
tank/media devices off local
tank/media exec off local
tank/media setuid off local
tank/media readonly off default
tank/media zoned off default
tank/media snapdir hidden default
tank/media aclinherit restricted default
tank/media canmount on local
tank/media xattr on default
tank/media copies 1 default
tank/media version 5 -
tank/media utf8only off -
tank/media normalization none -
tank/media casesensitivity mixed -
tank/media vscan off default
tank/media nbmand on local
tank/media sharesmb on local
tank/media refquota none default
tank/media refreservation none default
tank/media primarycache all default
tank/media secondarycache all default
tank/media usedbysnapshots 0 -
tank/media usedbydataset 2.83T -
tank/media usedbychildren 0 -
tank/media usedbyrefreservation 0 -
tank/media logbias latency default
tank/media dedup off default
tank/media mlslabel none default
tank/media sync standard default
tank/media refcompressratio 1.00x -
tank/media written 2.83T -
tank/media logicalused 2.85T -
tank/media logicalreferenced 2.85T -
tank/media filesystem_limit none default
tank/media snapshot_limit none default
tank/media filesystem_count none default
tank/media snapshot_count none default
tank/media snapdev hidden default
tank/media acltype off default
tank/media context none default
tank/media fscontext none default
tank/media defcontext none default
tank/media rootcontext none default
tank/media relatime off default
tank/media redundant_metadata all default
tank/media overlay off defaultI don't get where this EPERM come from.
Regards,
John
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#2 2016-05-03 03:38:52
- brando56894
- Member
- From: NYC
- Registered: 2008-08-03
- Posts: 681
Re: zfs mount gives EPERM
You shouldn't have to mount your dataset tank/media, it should be automatically available when your pool tank is mounted. I just switched over from Ubuntu to Arch for my server (should have gone with Arch in the first place but I never actually knew about the stable kernel until recently), and it was pretty painless. I just had to install the kernel modules and then load them and boom my pools were mounted in the same place that they were under Ubuntu (/mnt).
for example, here's my safekeeping pool
[root@nas ~]# zfs list
NAME USED AVAIL REFER MOUNTPOINT
safekeeping 635G 264G 96K /mnt/safekeeping
safekeeping/backups 5.87G 264G 5.87G /mnt/safekeeping/backups
safekeeping/misc 629G 264G 629G /mnt/safekeeping/miscwhen you do a ls /tank|grep media it doesn't show anything?
Have you tried scrubbing your pool?
Last edited by brando56894 (2016-05-03 03:39:30)
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#3 2016-05-04 17:36:49
- fuzzy2
- Member
- Registered: 2016-04-16
- Posts: 7
Re: zfs mount gives EPERM
You shouldn't have to mount your dataset tank/media, it should be automatically available when your pool tank is mounted.
He did (although subtly) mention that this isn’t the case on his machine.
It is also visible in the zpool status output that be scrubbed recently.
@OP: Do you have any mount options set in /etc/fstab?
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