Need help mounting a pre-existing zvol

[jbruce716]

All - My dedicated NAS server died, and now I'm recovering my ZFS array. I've got everything sorted except for one piece.

I had a zvol exposed as an ISCSI share, and had that imported into proxmox as an lvm disk for VM storage. Now, without the ISCSI portion, I can't figure out how to mount the zvol to migrate my data off of it. If I try to simply mount it, I get an LVM based error: "unknown filesystem type 'LVM2_member'."

Is there a way to temporarily mount this so I can finish cleaning up?

Not sure sure what other data would be useful when thinking of advice, I'm willing to copy/paste any output necessary for help.

 

[jbruce716]

Bump - maybe this isn't a common scenario?

 

[dcsapak]

if an lvm is on the disk you have to first get it into lvm using e.g. pvscan etc.
possibly the /dev/zvol entries are excluded in /etc/lvm/lvm.conf (search for 'global' filter)

 

[jbruce716]

Thanks! I ran pvscan and it only shows the current bootdisk which was made into an lv during installation. I also didn't see anything obvious in the lvm.conf file excluding the zvol.

Here's some more context:

I can see the zvol with a couple commands.

fdisk -l

Disk /dev/zd0: 1000 GiB, 1073741856768 bytes, 2097152064 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 32768 bytes
I/O size (minimum/optimal): 32768 bytes / 32768 bytes

and also with the zfs command: (the one at the bottom that isn't mounted)

root@pve:~# zfs list
NAME                                                        USED  AVAIL     REFER  MOUNTPOINT
dumpster                                                   9.92T  5.06T     27.1G  /dumpster
dumpster/.bhyve_containers                                 70.6M  5.06T     70.6M  /dumpster/.bhyve_containers
dumpster/.system                                            214M  5.06T      222K  legacy
dumpster/.system/configs-229b43ea8de442e68f6896e2baff0028   122M  5.06T      122M  legacy
dumpster/.system/cores                                     1015K  1023M     1015K  legacy
dumpster/.system/rrd-229b43ea8de442e68f6896e2baff0028      75.8M  5.06T     75.8M  legacy
dumpster/.system/samba4                                    4.09M  5.06T     1.09M  legacy
dumpster/.system/services                                   205K  5.06T      205K  legacy
dumpster/.system/syslog-229b43ea8de442e68f6896e2baff0028   10.9M  5.06T     10.9M  legacy
dumpster/.system/webui                                      188K  5.06T      188K  legacy
dumpster/Home                                               170G  5.06T      170G  /dumpster/Home
dumpster/Time Machine                                       310G  5.06T      310G  /dumpster/Time Machine
dumpster/isoStorage                                        10.3G  5.06T     10.3G  /dumpster/isoStorage
dumpster/media                                             7.52T  5.06T     7.52T  /dumpster/media
dumpster/nextcloud                                         1.40T  5.06T     1.40T  /dumpster/nextcloud
dumpster/vmbackups                                         60.7G  5.06T     60.7G  /dumpster/vmbackups
dumpster/vmscsistorage                                      449G  5.06T      449G  -