I need some help with adding an existing pool to Unraid.

This pool comes from another Unraid server and was encrypted by Unraid itself. The password is the same as the one used for my other pools.

I have already done a few test runs. Sometimes the pool could be added, but after a reboot I always had to manually import the pool again. In addition, the Unraid dashboard keeps showing “Format disk” on the front page, which feels quite risky.

Now I would like to perform the migration properly for real.
Both pools are currently named mainstorage. Is it possible to rename one of the pools and then safely import it into Unraid?

https://prnt.sc/r1AeXY9hr2Gz

Edited February 9Feb 9 by beantje

You should be able to import it as a new pool, if you tried to import it before, on main click on the first device for that pool and then "remove pool"

back on main, create a new pool with the name you want and the correct number of slots

assign the pool device(s), leave the filesystem set to auto

start the array to import the pool

did not work, unraid wont accept same pool name twice, and im not able to copy 140TB

and now the main pool is messed up, cant get it back to work :/ god damn

3 hours ago, beantje said:

did not work, unraid wont accept same pool name twice, and im not able to copy 140TB

You can use a different name; just create a new pool with one, if that is not working, post the diags after doing the steps above.

i created new pool with different name ( but the hard disk have pool name same as the other one )
it worked until i restarted and now it does not want to import my pool mainstorage anymore...

oot@:~# zpool import -d /dev/mapper

pool: mainstorage

id: 18075257269857129199

state: UNAVAIL

status: One or more devices contains corrupted data.

action: The pool cannot be imported due to damaged devices or data.

see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-5E

config:

mainstorage UNAVAIL insufficient replicas

raidz1-0 UNAVAIL insufficient replicas

sdh1 ONLINE

sdc1 ONLINE

sdf1 ONLINE

sdd1 ONLINE

sde1 UNAVAIL invalid label

sdg1 UNAVAIL invalid label

whatever i do i can't repair this ... lost 60TB

i did not format anything yet, but i spend whole day trying

this is the best i could get but still

Lightshot

Schermafbeelding

Vastgelegd met Lightshot

Edited February 9Feb 9 by beantje

The pool is damaged; it's just not an import issue, since it's raidz1 and there are two missing devices, it may not be recoverable, still.

2 hours ago, JorgeB said:

post the diags after doing the steps above.

well it happend after i imported pool with same name from different unraid,

had to test first before doing on my main straight away

Just importing the pool would not damage it, at least not using the steps I provided above.

2 hours ago, JorgeB said:

Just importing the pool would not damage it, at least not using the steps I provided above.

yes import worked once i rebooted it could not import because there where 2 pools with name "mainstorage"

then things got mixed up, wrote zfs info on wrong disk or something like that

10 hours ago, beantje said:

yes import worked once i rebooted it could not import because there where 2 pools with name "mainstorage"

The GUI won't accept two pools with the same name, so you must have done something different.

1 hour ago, JorgeB said:

The GUI won't accept two pools with the same name, so you must have done something different.

the gui don't
but i gave it different name in gui, but the poolname was already set in that zfs pool and that cant be changed so in the end you have 2 different pool names in gui, but still 2 same underneath and that makes problem

2 hours ago, beantje said:

but the poolname was already set in that zfs pool and that cant be changed

It can, if you give it a new name in the GUI, Unraid will import the pool with the new name, and it always imports the pool based on the pool UUID, not the old/current name; it just sets the new name during import, e.g.:

Feb  6 07:54:26 Tower7 emhttpd: shcmd (451): /usr/sbin/zpool import -f -m -N -o autoexpand=on  -d /dev/nvme0n1p1 -d /dev/nvme4n1p1 -d /dev/nvme5n1p1 -d /dev/nvme6n1p1 -d /dev/nvme7n1p1 5823356380338176758 cache

The pool is imported using the UUID 5823356380338176758 and at the same time named as cache, this behavior is the same regardless of the old name.