[SOLVED] datastore recovery

[luphi]

Let's assume, I install the Server in that way, that I have one dedicated disk for the OS and one dedicated disk for the datastore.
When I have to replace the OS disk for any reason and reinstall from scratch, is there any way to import the datastore disk or are all the backups lost?

When I simply try to recreate it, it ends up with Error: unable to create chunk store 'ds1' subdir "/var/lib/vz/dump/.chunks" - EEXIST: File exists

Cheers,
luphi

 

[t.lamprecht]

When I have to replace the OS disk for any reason and reinstall from scratch, is there any way to import the datastore disk or are all the backups lost?

All important data, chunks and indexes are stored in the datastore path. So, just re-add it under the same path.
For now, you can simply add it to /etc/proxmox-backup/datastore.cfg:

datastore: name
        path /path/to/previous/ds

The respective add command will be enhanced to make such a process easier.

 

[luphi]

Exactly, what I was searching for. Seems to work.

Cheers,
luphi

 

[abranca]

I agree with this post.
I have the opposite example.

I had to replace the data disk where the backups are saved. I copied everything from the old disk to the new one, I edited the cfg file but when I go to browse the contents of the datastore I get this error

Bad Request (400)
unable to detect file type

[SOLVED]
In case of data disk replacement, you need to change the folder permissions.

chown backup:backup .chunks ct vm .locks -R

solved my problem

 

[fireon]

All important data, chunks and indexes are stored in the datastore path. So, just re-add it under the same path.
For now, you can simply add it to /etc/proxmox-backup/datastore.cfg:

datastore: name
        path /path/to/previous/ds

The respective add command will be enhanced to make such a process easier.

Ok, and if the path is no longer known?

 

[fireon]

Ok, after i add these entries directly manualy in the configfile it works perfectly. a

 

[t.lamprecht]

Ok, and if the path is no longer known?

You could search for all directories containing a .chunks sub-directory, as those normally distinguishes datastores.

For example, by using the following command:

find / -type d -path '*/.chunks/*' -prune -o -name '.chunks' -print

note that while this is already a bit optimized (doesn't enters any found .chunks avoiding to search lots of directories) it still searches the whole filesystem tree and all its mounted filesystems, so it may be quite slow.

 

[tyjtyj]

You could search for all directories containing a .chunks sub-directory, as those normally distinguishes datastores.

For example, by using the following command:

find / -type d -path '*/.chunks/*' -prune -o -name '.chunks' -print

note that while this is already a bit optimized (doesn't enters any found .chunks avoiding to search lots of directories) it still searches the whole filesystem tree and all its mounted filesystems, so it may be quite slow.

I edit the datastore.cfg
I can see the datastore in PBS.

I can create new backup to datastore from Proxmox
however i cant see all the previous backup data.

Update:
I notice datastore use some kind of encoding as it was mount from samba. Rename it seems to fix the issue .
I am sharing incase someone having same issue

PBS:/mnt/hdd/pbs/ct/111# ls -la
total 24
drwxrwxrwx 5 backup backup 4096 Oct 24 17:44  .
drwxrwxrwx 6 backup backup 4096 Oct 24 17:40  ..
drwxrwxrwx 2 backup backup 4096 Oct 23 22:34 '2022-10-23T09'$'\357\200\242''49'$'\357\200\242''16Z' <--- samaba
drwxrwxrwx 2 backup backup 4096 Oct 23 22:34 '2022-10-23T10'$'\357\200\242''17'$'\357\200\242''22Z'
drwxr-xr-x 2 backup backup 4096 Oct 24 17:44  2022-10-24T17:44:33Z   <- bindmount
-rw-rw---- 1 backup backup   10 Oct 23 09:49  owner

 

[phaus]

Thx. That saved me some troubles!

 

[myssv]

I can't make it running ...

I edited the cfg



but it allways state Datastore not available

 

[_gabriel]

check with mount command if your nas is mounted. nfs or samba require mount to be browsable.

 

[myssv]

Thanks for the hint. I found it .....

Now I can add the pbs to my storages, but still can't see the backups.

A verify show me this:



So it seems I'm on the right way, but still missing the backups

 

[_gabriel]

fix file system permissions with :
chown backup:backup -R /path/to/your/datastore
chmod -R 700 /path/to/your/datastore

 

[myssv]

Da bekomme ich viele Fehler:

 

[myssv]

I tried this:

touch /mnt/backup/test_file

and the file was created.

Tha datastore is on a Synology NAS.

 

[_gabriel]

smb or nfs ?

 

[myssv]

nfs

 

[myssv]

I found the problem, same as here

I had to rename some directorys:

 

[edwin_nl020]

I found the problem, same as here

I had to rename some directorys:
View attachment 71048

Hi @myssv ,

Can you please elaborate on what you did to solve it? I have exactly the same problem.

Thanks!

 

[phaus]

@edwin_nl020 you just have to replace the "square characters" with ":" and the PBS should be able to read the folders again.
I guess, the filename encoding gets lost on the file share…