NAS 540 has lost all data.

Cha

Unfortunately I could not mount the volume. Here is the result of the input:

~ # su

BusyBox v1.19.4 (2017-05-26 16:43:23 CST) built-in shell (ash)

Enter 'help' for a list of built-in commands.

~ # mkdir -p / mnt / md2

~ # mount / dev / md2 / mnt / md2

mount: unknown filesystem type 'LVM2_member'

Cha

I pressed the Create button, see page 4:

Then I broke off the process.

What do you think? If you finish the process and include the disk? Is the data accessible or permanently gone?

Mijzelf

mount: unknown filesystem type 'LVM2_member'

The raid array isn't the data filesystem yet, there is a logical volume group on it. Unfortunately I have not much experience with that. A google brought me this, which seems a usable step-through.

If you are root, by executing su, you can skip the 'sudo'.

What do you think? If you finish the process and include the disk? Is the data accessible or permanently gone?

If you finish the process to create a new volume, the data is gone for all practical purposes.

Cha

Hello,

This time I logged in with root immediately and then the command
~ # mkdir -p / mnt / md2
~ # mount / dev / md2 / mnt / md2
started.
The result:

login as: root
root@10.0.0.120's password:


BusyBox v1.19.4 (2017-05-26 16:43:23 CST) built-in shell (ash)
Enter 'help' for a list of built-in commands.

~ # mkdir -p / mnt / md2
~ # mount / dev / md2 / mnt / md2
mount: unknown filesystem type 'LVM2_member'



Unfortunately it is the same.

Mijzelf

You didn't read that page I pointed to, did you?

In your case you can't mount the assembled raid array directly, because you have to mount (one of) the embedded logical volumes.