Deleted Volume

[EdwardGBaker]

I did a clean install of FreeNAS Corral and while trying to recreate my shares I accidentally deleted my Volume. Deciding that I didn't like the new GUI I did a fresh install of FreeNAS 9.10. Tired to import the volume but it didn't show up. I went to the console and did the command "zpool import -D" as I had read online that this can recover your volume. It showed up and said that I had to run it as -f as it had previously been accessed on a different device. I ran "zpool import -D -f MassStorage". It didn't import and now it won't show up anywhere.

Any advise as while most of the data is recoverable not all is.

Thanks

 

[darkwarrior]

Hello there,

Oh that looks bad...
can you post between code tags the actual output of the commands you ran on your system ?
Also, all disks are still connected ?

 

[EdwardGBaker]

no. i shut the system down to avoid writing anything else to the disks (and to stop myself messing around and making it more irrecoverable) . when i ran the first command it worked perfectly showing me the pool and said that since it had been accessed on a previous system (the corral system) I had to run it as -f to force it to import.

 

[rs225]

How much time between the destroy and the shutdown? Was the pool optimized at creation time for 4K/AF disks?

Did you delete one thing, or did you somehow destroy the entire pool? -D is for importing destroyed pools, not a destroyed dataset.

what if you try zpool import -o readonly=on -f MassStorage ?

 

[EdwardGBaker]

I hadn't really optimised it for anything as i'm a total noob to this sort of thing. Its a 3 drive raidz1 array made up of WD reds that I built out of old hardware when my WD MyCloud ran out of performance. As for how long between destruction and shutdown. Probaly no more than 10 minutes.

When I run zpool import -o readonly=on -f MassStorage it comes back with "cannot import 'MassStorage': a pool with that name is already created/imported, and no additional pools with that name were found".

 

[darkwarrior]

and zpool status -v ??

 

[EdwardGBaker]

pool: MassStorage
state: ONLINE
scan: scrub repaired 0 in 2h4m with 0 errors on Sat Feb 25 18:04:05 2017
config:

NAME STATE READ WRITE CKSUM
MassStorage ONLINE 0 0 0
raidz1-0 ONLINE 0 0 0
gptid/6e2fd4eb-f7ff-11e5-81eb-1c6f654939d8 ONLINE 0 0 0
gptid/6e985742-f7ff-11e5-81eb-1c6f654939d8 ONLINE 0 0 0
gptid/6f2a95ec-f7ff-11e5-81eb-1c6f654939d8 ONLINE 0 0 0

errors: No known data errors

pool: freenas-boot
state: ONLINE
scan: none requested
config:

NAME STATE READ WRITE CKSUM
freenas-boot ONLINE 0 0 0
ada1p2 ONLINE 0 0 0

 

[darkwarrior]

So your pool is online already :)
can you go into /mnt/MassStorage and list content?

 

[EdwardGBaker]

If I go ls /mnt/MassStorage I get "No such file or directory", and if I do ls /mnt I get "md_size"

 

[rs225]

Do a zfs list If your item is listed there, you are in better shape probably. If your item is gone, you need to do a zpool export -f MassStorage and then re-do the readonly version above. However, at this point, the odds of rewind working to recover a deleted dataset are going to be low.

If that is the scenario, also post zpool history -il MassStorage | tail -n100 Be sure to put it in a Code bracket.

 

[EdwardGBaker]

Its listed :)

NAME USED AVAIL REFER MOUNTPOINT
MassStorage 1011G 2.52T 139K /mnt/MassStorage
MassStorage/Edwards 26.0G 2.52T 26.0G /mnt/MassStorage/Edw
ards
MassStorage/Game Backups 382G 2.52T 382G /mnt/MassStorage/Gam
e Backups
MassStorage/ISOs 4.52G 2.52T 4.52G /mnt/MassStorage/ISO
s
MassStorage/Public Media 598G 2.52T 598G /mnt/MassStorage/Pub
lic Media
MassStorage/Public Media/Public Media 117K 2.52T 117K /mnt/MassStorage/Pub
lic Media/Public Media
freenas-boot 647M 53.1G 64K none
freenas-boot/ROOT 640M 53.1G 29K none
freenas-boot/ROOT/Initial-Install 1K 53.1G 636M legacy
freenas-boot/ROOT/default 640M 53.1G 637M legacy
freenas-boot/grub 6.34M 53.1G 6.34M legacy

Where should i go from here?

 

[rs225]

If it isn't showing up in /mnt, then try zfs mount -a

 

[EdwardGBaker]

That doesn't seem to have done anything

 

[EdwardGBaker]

I lied. It now shows up in /mnt along with all the data sets inside. Still can't see it from the gui though

 

[rs225]

I would try a reboot at this point. If it doesn't show up after that, someone else will have to assist, or you may want to start a new thread in General Questions asking about datasets not appearing in GUI.

 

[EdwardGBaker]

Thanks for the help guys. I've been able to create a new volume, dataset and share, with an old drive i have lying around. This has let me copy the media of the ZFS pool through command line on to something I can access from my desktop to recover the data from. I've already been able to recover the most precious (and irrecoverable) bits and am now starting on the rest. Much thanks you've saved me no end of trouble with this.

THANK YOU!!! :):):)

 

[rs225]

The only thing better than one backup is two backups. ;)

 

[EdwardGBaker]

New drive ordered to act as backup only and it may be time to resurrect the MyCloud as 3rd source.

 

[darkwarrior]

The only thing better than one backup is two backups. ;)

That's a good quote to remember