External Libraries will disappear when mount goes offline

[a7mad3bdullah]

I have searched the existing issues, both open and closed, to make sure this is not a duplicate report.

• Yes

The bug

My setup is:
Immich on Debian 11 mini PC
Photos on Synology NAS
Machine Learning done on gaming PC with intel GPU
Photos added to immich as external library (NAS folder is mounted to mini PC)

When for some reason the mount went offline or disconnected, the library will go empty (which is normal).

The issue is that when the external folder is back online, the server has to re-scan the library, generate thumbnails, run face detection, read metadata, and run ML.

With library of 30K photo/video, it will tax the immich server, NAS and Gaming PC every time this happens.

If

The OS that Immich Server is running on

Denian 11

Version of Immich Server

v1.131.1

Version of Immich Mobile App

V1.13.1

Platform with the issue

• Server
• Web
• Mobile

Your docker-compose.yml content

NA as immich is running fully normal

Your .env content

Same

Reproduction steps

1.Add external libraries on a mounted disk over network
2.disconnect the disk
3.remount the disk
4. Scan the library
...

Relevant log output

Additional information

No response

[alextran1502]

This is the expected behavior, if the mount goes offline, the assets will be put in the trash. After the mount is properly mounted, running the library scan will put them back in place

[a7mad3bdullah]

Thank you @alextran1502 for prompt reply, totally understood the expected behaviour according to docs:

If an external asset is deleted from disk, Immich will move it to trash on rescan. To restore the asset, you need to restore the original file. After 30 days the file will be removed from trash, and any changes to metadata within Immich will be lost.

However, I belive this is not the case, assest don't shwo up in trash and even when the drive is back online, metadata had to be rebuilt again, etc. Even worse, vidoes have to be re-transcoded again which is extremely toxing the mini PC CPU for prolong periods, since it has no dedicated GPU.

I would really appreciate good practices to avoid this altogether instead of fixing it. Any common misstakes or scenarios that causes this that should be avoided please.

Thanks again.

[alextran1502]

This sounds like a bug. Can you reliably reproduce this?

[a7mad3bdullah]

I am currently re-building my libraray, once it is done, I will try to reproduce it. Thanks

[Salvoxia]

I can reproduce this and opened #17419 for it.