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Jaster

(solved) Cache unmountable

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Was this the config before rebooting, i.e., is cache5 supposed to be empty, also were there any recent changes to the pool, like any removed device?

Feb 12 19:41:21 Knowlage emhttpd: import 30 cache device: (sdp) Crucial_CT256M550SSD1_14110C0ABBC5
Feb 12 19:41:21 Knowlage emhttpd: import 31 cache device: (sdd) Samsung_SSD_840_EVO_120GB_S1D5NSBF356565L
Feb 12 19:41:21 Knowlage emhttpd: import 32 cache device: (sdq) Samsung_SSD_840_PRO_Series_S12RNEAD237385F
Feb 12 19:41:21 Knowlage emhttpd: import 33 cache device: (sdh) Samsung_SSD_850_PRO_256GB_S251NXAG707229V
Feb 12 19:41:21 Knowlage emhttpd: import 34 cache device: no device
Feb 12 19:41:21 Knowlage emhttpd: import 35 cache device: (sdn) Samsung_SSD_860_EVO_500GB_S3Z2NB0K928070H

The pool status is kind of strange, because all devices are present but also there's a misplaced device:

Feb 12 19:41:26 Knowlage emhttpd: cache uuid: 4e8aad16-d250-4b85-8232-bb5ce9b6f8e6
Feb 12 19:41:26 Knowlage emhttpd: cache TotDevices: 5
Feb 12 19:41:26 Knowlage emhttpd: cache NumDevices: 5
Feb 12 19:41:26 Knowlage emhttpd: cache NumFound: 5
Feb 12 19:41:26 Knowlage emhttpd: cache NumMissing: 0
Feb 12 19:41:26 Knowlage emhttpd: cache NumMisplaced: 1
Feb 12 19:41:26 Knowlage emhttpd: cache NumExtra: 0
Feb 12 19:41:26 Knowlage emhttpd: cache LuksState: 0

 

Don't remember seeing this before, below is the reason why it's not mounting, but not really sure what it means:

Feb 12 19:41:26 Knowlage kernel: BTRFS error (device sdp1): super_num_devices 5 mismatch with num_devices 5 found here

 

 

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What happened: I was tinkering with the server and booted while one cache disk was unmounted. The cache started a rebuild (Raid5).

After it completed I shutdown (graceful), reattached the missing drive and booted up.

What you see is the result.

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I just rebuild the cache and restored most stuff from my backup. I only struggle with restoring the VM configuration. I opened a Thread for that, hoping someone can help.

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