Changing the mount point of a ZFS Pool

[Impulse1]

As mentioned in another thread, I made a misguided mistake in the original setup of my ZFS filesystem, and never realized it was an issue until it was to late to start over fresh. Never had an issue with it though until recently trying to use the onebutton extension.

The mount point for my pool is /mnt instead of /mnt/pool1 or similar. I'm looking for a way to change the mount point of my zfs pool without a loss of data and without messing up my system settings.

Let me know what other details I need to provide. And be patient if I don't reply right away, I really appreciate the help from this forum, I'm just on the road a lot for work and don't always have access to my server to test recommendations.

current status of pool:

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nas4free: ~# zpool status
  pool: Pool1
 state: ONLINE
status: Some supported features are not enabled on the pool. The pool can
	still be used, but some features are unavailable.
action: Enable all features using 'zpool upgrade'. Once this is done,
	the pool may no longer be accessible by software that does not support
	the features. See zpool-features(7) for details.
  scan: resilvered 431G in 5h35m with 0 errors on Mon Jul 10 16:11:26 2017
config:

	NAME        STATE     READ WRITE CKSUM
	Pool1       ONLINE       0     0     0
	  raidz2-0  ONLINE       0     0     0
	    ada0    ONLINE       0     0     0
	    ada1    ONLINE       0     0     0
	    ada2    ONLINE       0     0     0
	    ada3    ONLINE       0     0     0
	    ada4    ONLINE       0     0     0
	    ada5    ONLINE       0     0     0

errors: No known data errors

And a screen shot of my configuration from the webgui. Currently running NAS4Free 11.1.0.4 (revision 4551)

[raulfg3]

Documentation:
https://docs.oracle.com/cd/E19253-01/81 ... index.html
https://docs.oracle.com/cd/E19253-01/81 ... index.html

precautions:
1 - save in a safe place your config ( without encryption (as plain text) <- You need it in case that something goes wrong)




you need to open a shell ( i use Putty from windows and login in your Nas as root)

once done, :
1- export your pool

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zpool export Pool1

2 import forcing new mount path
eg:

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zpool import -d /mnt/Pool1 Pool1

if you want to monut on /mnt/Pool1 . if you want /mnt/MyPool use apropiate path

3 - sync webGUI: go to Disks > ZFS > Configuration > Synchronize and check the Overwrite disks configuration to save your actual mount point

must work, post same screen captures after this to revise that all is correct.


PD: If all is correct you need to upgrade your pool to latest version to support new features, you can do it from webGUI or from shell by command

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Zpool upgrade

[Impulse1]

Struggled for a bit to find everything that was running and disable it so that I wasn't getting this error:

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nas4free: ~# zpool export Pool1
cannot unmount '/mnt/NAS_Services': Device busy

But finally got the export to work (or at least not give me any errors). But I'm now greeted with an error that I can't import the pool:

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Welcome to NAS4Free!
nas4free: ~# zpool export Pool1
nas4free: ~# zpool import -d /mnt/Pool1 Pool1
cannot open '/mnt/Pool1': must be an absolute path
cannot import 'Pool1': no such pool available

Any suggestions? Thanks again.

[raulfg3]

try zpool import to show how many pools are availables to import and try to import using his "ID"

https://docs.oracle.com/cd/E19253-01/81 ... index.html


you can try with "-f" = force option like docs.oracle says.

[raulfg3]

If not work, you can revert using "zpool import ID" <- your ID or name of your pool this mount your pool in the default folder.


PD: one question, in which filesystem where created originally your pool?.

zpool history tell you

[Impulse1]

Reverted using my import ID as you recommended. I didn't try the -f command, thought I'd answer the zpool history question first, in case there was something you saw in there.

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nas4free: ~# zpool import
   pool: Pool1
     id: 3099138660936513948
  state: ONLINE
 status: Some supported features are not enabled on the pool.
 action: The pool can be imported using its name or numeric identifier, though
	some features will not be available without an explicit 'zpool upgrade'.
 config:

	Pool1       ONLINE
	  raidz2-0  ONLINE
	    ada0    ONLINE
	    ada1    ONLINE
	    ada2    ONLINE
	    ada3    ONLINE
	    ada4    ONLINE
	    ada5    ONLINE
nas4free: ~# zpool import 3099138660936513948
nas4free: ~# zpool history
History for 'Pool1':
2015-02-18.21:58:33 zpool create -f -m /mnt Pool1 raidz2 ada0 ada1 ada2 ada3 ada4 ada5
2015-02-18.22:13:41 zpool import -d /dev -f -a
2015-02-18.22:50:39 zfs create -o compression=off -o dedup=off -o sync=standard -o atime=on Pool1/NAS_Services
2015-02-18.22:53:16 zfs create -o compression=off -o dedup=off -o sync=standard -o atime=on Pool1/Media
2015-02-18.22:54:11 zfs create -o compression=off -o dedup=off -o sync=standard -o atime=on Pool1/Users
2015-02-18.23:51:02 zfs create -o compression=off -o dedup=off -o sync=standard -o atime=on Pool1/Jail
2015-06-09.11:53:57 zpool import -d /dev -f -a
...
'abbreviated code, roughly 25 imports between dates.
...
2017-07-09.23:13:17 zpool import -d /dev -f -a
2017-07-09.23:18:34 zpool replace Pool1 ada1 ada1
2017-07-10.10:25:25 zpool import -d /dev -f -a
2017-07-10.10:35:47 zpool replace Pool1 ada3 ada3
2017-07-10.18:33:40 zpool online -e Pool1 ada1
2017-07-10.18:34:19 zpool online -e Pool1 ada3
2017-07-10.18:38:55 zpool import -d /dev -f -a
...
'abbreviated code, roughly 20 imports between dates.
...
2017-10-24.02:06:44 zpool import -d /dev -f -a
2017-10-24.02:08:42 zpool export Pool1
2017-10-24.16:39:56 zpool import 3099138660936513948

Looking at the webgui, the pool seems to be back to how it was.

[tony1]

you can change the mount point in the gui.
Disks > ZFS > Pools > Management > Edit "Mount Point"

the default is empty.

[raulfg3]

Thanks tony1 , I do not know it, because is a "rare" action to do with pools.


PD: I see the zpool history of Impulse1, and apparently the pool was created correctly , so a folder named Pool1 must to be created on /mnt like /mnt/Pool1

the lines that i do not understand are: zpool import -d /dev -f -a

I do not know what the user/process want with this, perhaps create the pool in /dev instead in /mnt

[Impulse1]

I was just blindly following directions that I found on this forum somewhere, wish I knew which ones now. But I definitely remember doing something that set just /mnt as the Pools mounting point, at the time it seemed like a logical thing to do.

I don't have a "Pool1" folder anywhere in /mnt or /dev

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nas4free: ~# cd /mnt
nas4free: /mnt# ls -l
total 99
drwxr-xr-x   8 root  wheel  12 Sep 11 19:59 Jail
drwxrwxr-x   9 root  wheel  14 Nov 20  2015 Media
drwxrwxrwx  11 root  wheel  20 Oct 24 01:50 NAS_Services
drwxr-xr-x   5 root  wheel   5 Sep 11 21:44 OBI
drwxr-xr-x   3 root  wheel   5 Oct 24 01:50 OwnCloud
drwxrwxrw-   8 root  wheel  13 Oct  3 04:39 Users
nas4free: /mnt# cd /dev
nas4free: /dev# ls -l
total 4
crw-r--r--  1 root  wheel     0x32 Oct 24 02:06 acpi
crw-r-----  1 root  operator  0x88 Oct 24 02:06 ada0
crw-r-----  1 root  operator  0x89 Oct 24 02:06 ada1
crw-r-----  1 root  operator  0x8a Oct 24 02:06 ada2
crw-r-----  1 root  operator  0x8b Oct 24 02:06 ada3
crw-r-----  1 root  operator  0x8c Oct 24 02:06 ada4
crw-r-----  1 root  operator  0x8d Oct 24 02:06 ada5
crw-rw-r--  1 root  operator  0x34 Oct 24 02:06 apm
crw-rw----  1 root  operator  0x33 Oct 24 02:06 apmctl
crw-------  1 root  wheel     0x61 Oct 24 02:06 atkbd0
crw-------  1 root  kmem      0x21 Oct 24 02:06 audit
crw-------  1 root  wheel     0x20 Oct 24 02:06 auditpipe
crw-------  1 root  wheel     0x30 Oct 24 02:06 bpf
lrwxr-xr-x  1 root  wheel        3 Oct 24 02:06 bpf0 -> bpf
crw-------  1 root  wheel      0x7 Oct 24 02:06 console
crw-------  1 root  wheel     0x60 Oct 24 02:06 consolectl
crw-r-----  1 root  kmem      0x22 Oct 24 02:06 cpuctl0
crw-r-----  1 root  kmem      0x23 Oct 24 02:06 cpuctl1
crw-r-----  1 root  kmem      0x24 Oct 24 02:06 cpuctl2
crw-r-----  1 root  kmem      0x25 Oct 24 02:06 cpuctl3
crw-r-----  1 root  kmem      0x26 Oct 24 02:06 cpuctl4
crw-r-----  1 root  kmem      0x27 Oct 24 02:06 cpuctl5
crw-r-----  1 root  kmem      0x28 Oct 24 02:06 cpuctl6
crw-r-----  1 root  kmem      0x29 Oct 24 02:06 cpuctl7
crw-rw-rw-  1 root  wheel     0x67 Oct 24 02:06 crypto
crw-rw-rw-  1 root  wheel     0x2f Oct 24 02:06 ctty
crw-rw----  1 uucp  dialer    0x4d Oct 24 02:06 cuau0
crw-rw----  1 uucp  dialer    0x4e Oct 24 02:06 cuau0.init
crw-rw----  1 uucp  dialer    0x4f Oct 24 02:06 cuau0.lock
crw-r-----  1 root  operator  0x7d Oct 24 02:06 da0
crw-r-----  1 root  operator  0x7e Oct 24 02:06 da0p1
crw-r-----  1 root  operator  0x7f Oct 24 02:06 da0p2
crw-r-----  1 root  operator  0x86 Oct 24 02:06 da0p3
crw-r-----  1 root  operator  0x87 Oct 24 02:06 da0p4
crw-------  1 root  wheel      0x5 Oct 24 02:06 devctl
crw-------  1 root  wheel      0x6 Oct 24 02:06 devctl2
cr--r--r--  1 root  wheel      0xc Oct 24 02:06 devstat
dr-xr-xr-x  2 root  wheel      512 Oct 24 02:06 fd
crw-------  1 root  wheel      0xb Oct 24 02:06 fido
crw-rw-rw-  1 root  wheel     0x16 Oct 24 02:06 full
crw-r-----  1 root  operator   0x4 Oct 24 02:06 geom.ctl
dr-xr-xr-x  2 root  wheel      512 Oct 24 02:06 gpt
crw-r--r--  1 root  wheel     0x35 Oct 24 02:06 hpet0
crw-------  1 root  wheel     0x2a Oct 24 02:06 io
lrwxr-xr-x  1 root  wheel        6 Oct 24 02:06 kbd0 -> atkbd0
lrwxr-xr-x  1 root  wheel        7 Oct 24 02:06 kbd1 -> kbdmux0
crw-------  1 root  wheel      0xd Oct 24 02:06 kbdmux0
crw-------  1 root  wheel     0x2b Oct 24 02:06 klog
crw-r-----  1 root  kmem      0x13 Oct 24 02:06 kmem
dr-xr-xr-x  2 root  wheel      512 Oct 24 02:06 led
crw-r-----  1 root  operator  0x10 Oct 24 02:06 md0
crw-r-----  1 root  operator  0x11 Oct 24 02:06 md1
crw-r-----  1 root  operator  0x91 Oct 24 02:06 md2
crw-------  1 root  wheel      0xf Oct 24 02:06 mdctl
crw-r-----  1 root  kmem      0x12 Oct 24 02:06 mem
crw-rw-rw-  1 root  wheel     0x2c Oct 24 02:06 midistat
crw-rw-rw-  1 root  wheel     0x6a Oct 24 02:06 mixer0
crw-rw-rw-  1 root  wheel     0x6b Oct 24 02:06 mixer1
crw-rw-rw-  1 root  wheel     0x6c Oct 24 02:06 mixer2
crw-rw-rw-  1 root  wheel     0x6d Oct 24 02:06 mixer3
crw-------  1 root  wheel     0x15 Oct 24 02:06 netmap
crw-------  1 root  kmem      0x14 Oct 24 02:06 nfslock
crw-rw-rw-  1 root  wheel     0x17 Oct 24 17:51 null
crw-------  1 root  operator  0x73 Oct 24 02:06 pass0
crw-------  1 root  operator  0x74 Oct 24 02:06 pass1
crw-------  1 root  operator  0x75 Oct 24 02:06 pass2
crw-------  1 root  operator  0x76 Oct 24 02:06 pass3
crw-------  1 root  operator  0x77 Oct 24 02:06 pass4
crw-------  1 root  operator  0x78 Oct 24 02:06 pass5
crw-------  1 root  operator  0x79 Oct 24 02:06 pass6
crw-------  1 root  operator  0x7a Oct 24 02:06 pass7
crw-r--r--  1 root  wheel     0x1f Oct 24 02:06 pci
dr-xr-xr-x  2 root  wheel      512 Oct 24 20:17 pts
crw-r--r--  1 root  wheel      0x9 Oct 24 02:06 random
crwx------  1 root  wheel     0x7c Oct 24 02:06 rdma_cm
dr-xr-xr-x  2 root  wheel      512 Oct 24 02:06 reroot
crw-------  1 root  operator  0x7b Oct 24 02:06 ses0
crw-r--r--  1 root  wheel      0x8 Oct 24 02:06 sndstat
crw-------  1 root  wheel     0x2e Oct 24 02:06 speaker
lrwxr-xr-x  1 root  wheel        4 Oct 24 02:06 stderr -> fd/2
lrwxr-xr-x  1 root  wheel        4 Oct 24 02:06 stdin -> fd/0
lrwxr-xr-x  1 root  wheel        4 Oct 24 02:06 stdout -> fd/1
crw-------  1 root  wheel     0x2d Oct 24 02:06 sysmouse
crw-------  1 root  wheel     0x4a Oct 24 02:06 ttyu0
crw-------  1 root  wheel     0x4b Oct 24 02:06 ttyu0.init
crw-------  1 root  wheel     0x4c Oct 24 02:06 ttyu0.lock
crw-------  1 root  tty       0x50 Oct 24 02:06 ttyv0
crw-------  1 root  wheel     0x51 Oct 24 02:06 ttyv1
crw-------  1 root  wheel     0x52 Oct 24 02:06 ttyv2
crw-------  1 root  wheel     0x53 Oct 24 02:06 ttyv3
crw-------  1 root  wheel     0x54 Oct 24 02:06 ttyv4
crw-------  1 root  wheel     0x55 Oct 24 02:06 ttyv5
crw-------  1 root  wheel     0x56 Oct 24 02:06 ttyv6
crw-------  1 root  wheel     0x57 Oct 24 02:06 ttyv7
crw-------  1 root  wheel     0x58 Oct 24 02:06 ttyv8
crw-------  1 root  wheel     0x59 Oct 24 02:06 ttyv9
crw-------  1 root  wheel     0x5a Oct 24 02:06 ttyva
crw-------  1 root  wheel     0x5b Oct 24 02:06 ttyvb
crw-------  1 root  wheel     0x5c Oct 24 02:06 ttyvc
crw-------  1 root  wheel     0x5d Oct 24 02:06 ttyvd
crw-------  1 root  wheel     0x5e Oct 24 02:06 ttyve
crw-------  1 root  wheel     0x5f Oct 24 02:06 ttyvf
dr-xr-xr-x  2 root  wheel      512 Oct 24 02:06 ufs
dr-xr-xr-x  2 root  wheel      512 Oct 24 02:06 ufsid
crw-------  1 root  wheel     0x63 Oct 24 02:06 ufssuspend
lrwxr-xr-x  1 root  wheel        9 Oct 24 02:06 ugen0.1 -> usb/0.1.0
lrwxr-xr-x  1 root  wheel        9 Oct 24 02:06 ugen0.2 -> usb/0.2.0
lrwxr-xr-x  1 root  wheel        6 Oct 24 02:06 urandom -> random
dr-xr-xr-x  2 root  wheel      512 Oct 24 02:06 usb
crw-r--r--  1 root  operator  0x68 Oct 24 02:06 usbctl
crw-------  1 root  operator  0x69 Oct 24 02:06 xpt0
crw-rw-rw-  1 root  wheel     0x18 Oct 24 02:06 zero
crw-rw-rw-  1 root  operator  0x64 Oct 24 02:06 zfs

Even doing a search for Pool1 results in nothing.. (Not sure if I used that right command though, it did take like 5 minutes to complete.)

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nas4free: /# find / -name "Pool1"
nas4free: /# 

Anyways, Thanks Tony, I used the WebGUI and made the switch that way. Although I now have a duplicate of User and Jail directories under my /mnt folder. I'm assuming thats because I've linked them somewhere as root directories in some setup menu and they were likely recreated when I restarted my server. So I'll hunt those down and make changes.

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nas4free: /mnt# ls -l
total 23
drwxr-xr-x  5 root  wheel  512 Oct 24 20:35 Jail
drwxrwxr-x  8 root  wheel    8 Sep 11 21:49 Pool1
drwxr-xr-x  6 root  wheel  512 Oct 24 20:35 Users
nas4free: /mnt# cd Pool1
nas4free: Pool1# ls -l
total 99
drwxr-xr-x   8 root  wheel  12 Sep 11 19:59 Jail
drwxrwxr-x   9 root  wheel  14 Nov 20  2015 Media
drwxrwxrwx  11 root  wheel  20 Oct 24 01:50 NAS_Services
drwxr-xr-x   5 root  wheel   5 Sep 11 21:44 OBI
drwxr-xr-x   3 root  wheel   5 Oct 24 01:50 OwnCloud
drwxrwxrw-   8 root  wheel  13 Oct  3 04:39 Users

I'll report back when I try to get my PLEX Jail running again, as well as whether or not I can get Owncloud to work with OBI! The original reason for needing this fix..

[Impulse1]

Also, just checked the zfs history, and these are the commands that the WebGUI ran to change the mount location:

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2017-10-24.20:33:55 zfs set mountpoint=/mnt/Pool1 Pool1
2017-10-24.20:35:21 zpool import -d /dev -f -a

[raulfg3]

good news, so actually your only problem is the duplicate Jail & Users folders.

try to reboot to see if /mnt/Jail dissapear and only /mnt/Pool1/Jail exist.

PD: do a ls -la to be sure that /mnt/Jail is NOT a soft link of /mnt/Pool1/Jail

[Impulse1]

Went through all my services and updated the file paths to now include /mnt/Pool1/* and restarted the NAS again and the duplicate Jail and Users folders have disappeared.

Went to update my fstab for my PLEX server too and realized that my EXTENSIONS tab is missing from the WebGUI. Is there an easy way of getting that back? Or am I best off reinstalling OBI? and then all my extensions again through there? The OBI folder still exists, is there a simple start command I can run to get it going again?

Thanks again

[raulfg3]

go to system -> Advanced -> Command Script and edit to correct path of OBI:

1.jpg

[Impulse1]

Thanks for all the help raulfg3, I'm almost fully back up and running and using OBI instead of Jails.

Before I saw your last post, I just did a re-install of OBI, which brought the EXTENSIONS tab back, and then I did a force re-install of the extensions that I had previously installed with OBI, they weren't showing up otherwise. Oddly enough, I still couldn't get OwnCloud to work how I wanted it, (the original reason for this whole adventure..) so I tried NextCloud, and it works beautifully! Just need to run around updating all my apps on devices now..

The other issue I have is that I can't get the Brig to work now. I used the System > Advances > Command Script note from your last post to update any scripts that refer to the Brig, and then I tried re-installing the brig using OBI, and it still doesn't show up. Not a huge deal right now, as I was only using it for Owncloud and PLEX, so I was forced to use the OBI version of PLEX (It seems to be working well) but I would like to get the Brig working again.

For anyone else following along, VirtualBox wasn't working after the move. I had to disable the service and then edit the VirtualBox.xml found in Virtualbox>.config>VirtualBox>VirtualBox.xml. I just updated all the paths to include the new mount location, saved and re-enabled the VirtualBox service, and my Virtual Machines were back and able to start.