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Synology

This is a place for all topics regarding Synology hard- and software - especially (but not limited to) their NAS devices.

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Repair File on RAID 6 Volume (lemmy.world)

submitted 8 months ago by [email protected] to c/[email protected]

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I have a RAID 6 volume with data protection on my DS1621+. A video file seems to have become corrupt - it worked in Plex a few months ago but now it won’t play at all. I’ve tried in VLC, the built-in DSM video player - nothing seems to work. No other files appear to be corrupt, all drives show as Healthy.

Is it possible to repair the file, and if so how would I do that? My research seems to only find results where an entire volume is corrupt. In this case I’d like to just recover a single file.

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[–] [email protected] 1 points 8 months ago (1 children)

RAID is not a technology designed to manage backups... it is designed to either support speed or reliability. If you overwrite a good file with a bad one, then you have a very fast or reliable copy of a bad file.

[–] [email protected] 1 points 8 months ago

Yep, I understand that. I didn’t know if RAID 6, having parity bits, would be able to repair a file from that data. I figured being RAID would protect it from corruption but apparently not. I didn’t overwrite the file with a bad one, it just stopped working.