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Forum Discussion
resinch a dieing disk or add new disk & resinch?
Apologies again. I posted the same message in the "Test" board, and got complete unnoticed / unseen. As it is rather urgent, I am re-posting it here, where I hope it will be seen. I could not find a b...
berillio wrote: Just to clarify, what is the difference between:
Volume Scan
Re-synch
RAID Rebuild
A volume scan looks at the ext file system, and checks the directory structures and metadata for consistency. If it finds inconsistencies, it tries to correct them. If there are no consistencies, then nothing is changed.
A resync looks at the RAID level. One of the the disks is being resync'ed with the others, using the raid redundancy to compute the contents of that disk from the others.. That means that each block on that disk is being rewritten. If there are bad sectors on that disk, the process fails.
Resync and Rebuild are the same.
The NAS thinks one disk has failed. If the others are intact, the NAS should boot up without it, and give you access to all the files. But the volume will be degraded. So there is no possibility of resync - the device to be synced is not present. A volume scan will be done though, and that could result in some data loss.
berillio wrote: and what would I need, to end up without (if possible) any data loss, like it was 15h ago?
If you then hot-insert your replacement drive, a resync will occur.
I wouldn't reinsert the original disk just yet, since your test results are inconclusive.
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