Bhyve VM not working - how to recover data from ZVOL?

[victorhooi]

I previously setup a Bhyve instance that is currently not working.

I am currently on FreeNAS 11.2 RC2.

From the WebUI I am able to boot the VM - however, VNC output isn't working, Serial output shows nothing, and the machine doesn't seem to be grabbing a DHCP lease either.
M.
The VM is using a Zvol as it's disk - "vmstorage/qbittorrent-vm-disk" - which is backed by a 512 GB M.2 SSD.

Is there some easy way of reading this data disk directly from FreeNAS itself, so I can recover the data off it?

 

[victorhooi]

Based on this old thread I thought I'd try dd. (This page also mentions using dd with a zvol):

Code:

root@freenas-naulty-place[/mnt/datastore-naulty-place/documents]# dd if=/dev/zvol/vmstorage/qbittorrent-vm-disk of=./qbittorrent.img bs=1m
460800+0 records in
460800+0 records out
483183820800 bytes transferred in 1217.121099 secs (396989109 bytes/sec)

If I run file on it:

Code:

root@freenas-naulty-place[/mnt/datastore-naulty-place/documents]# file qbittorrent.img
qbittorrent.img: DOS/MBR boot sector; partition 1 : ID=0xee, start-CHS (0x0,0,2), end-CHS (0x3ff,255,63), startsector 1, 943718399 sectors, extended partition table (last)

Now the question is how to read it back - fdisk -l <img> doesn't seem to work on FreeNAS/FreeBSD.

Should I create a new Bhyve VM, and add the disk somehow?

 

[kdragon75]

Google FreeBSD mount raw image. Or if you lazy click the link:
https://lists.freebsd.org/pipermail/freebsd-questions/2012-August/244070.html
Note: you will need to replace "-t ufs" with the type of file system you are mounting. Also FreeBSD does not do EXT3/4 out of the box as I recall.

 

[kdragon75]

basically mount the file as a block device with mdconfig and then mount the partitions as normal. If FreeBSD cannot mount the partitions, move the file to a system that can.