[Help] F4-210 Initialization Issue

[donharris]

Hello,
I have a TerraMaster F4-210 with 4×4TB drives configured in RAID 5.

Some time ago, the NAS lost power unexpectedly. When I powered it back on, I was prompted to re-initialize the unit. After creating a user/password, the GUI displayed a warning that proceeding would delete all data, so I stopped there.

I connected the drives to my PC and confirmed that the filesystem structure is still present, so the data appears to be there. However, there is clearly some kind of corruption, either with TOS, the filesystem, or possibly both.

I've tried accessing the NAS through both the GUI and SSH using all of the accounts I previously configured, but I haven't had much success. From what I can tell, reinstalling TOS appears to require formatting the drives, which seems rather strange.

Are there any options for remounting or recovering the existing RAID volumes on the F4-210 without formatting or modifying the drives?

I also read that newer versions of TOS may allow the OS to be reinstalled without formatting the data drives. If that's correct, would moving these existing drives to a newer TerraMaster unit allow me to reinstall/recover TOS while preserving the RAID 5 data?

I'd really appreciate any advice or suggestions. Thanks!

[EriChan]

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