[SOLVED] PBS on Synology: unable to open chunk store : no such file or directory (os error 2)

Tumbleweed Tornado

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Feb 22, 2025
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I run Proxmox Backup Server as a VM on a Synology DS1821+. When I opened PBS today my backup was marked red in the Dashboard's Datastore section. On hovering over it says "unable to open chunk store at XXX : no such file or directory (os error 2)". I checked in File Station in DSM if the folder was missing, but everything is still there; BUT when I open the .chunks folder, I can't see files and I get a little window that says: "Maximum folder number exceeded. Please use another protocol (e.g. SMB) to view folders and contained files." [Edit:] I allready use SMB to connect PBS to my storage on the same Synology. Plenty of storage left on the Synology.

I just got into homelabbing, I'm noob as f@#k. Even my Linux-Fu is horrible. Can somebody explain how to fix this? Your help is much appreciated.
 
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Hi,
what's the status from within the VM? E.g. can you navigate to the datastore's root folder via the console in the WebUI and check if the .chunks folder is visible there?
 
No! The actual files 'n folders are in a folder called 'pbs'. When I do ls -la it' shows only dot and dotdot. But when I use File Station I can also see the ct and vm and .chunks folders and the files that are in them. Except for the .chunks of course that gives the error message in DSM.
 
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Then the filesystem your datastore's contents are located on is most likely not mounted, check also the output of mount to verify.