Replacing Drive after Failure - OFFLINE/UNKNOWN state

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soupboy wrote:

 

From my understanding when the drive was inserted, it should have automatically been taken care of, and should have started receiving data and gone ONLINE within a few hours.

If the replacement disk is blank, then after it is inserted the NAS should run a disk self-test, then begin a RAID resync.

But if the disk is formatted, the NAS will not do that.  With a formatted disk, you either need to format it in the NAS, or remove the partitions on a PC (so the NAS would see it as a blank disk).

There is another possibility - in some cases the linux disk drivers will disable the SATA port when a drive fails (it depends on exactly how it failed). I ran into this myself a few years back in my Pro-6.  In those cases, you need to reboot the NAS.  So I suggest powering down the NAS, and then disconnecting it from the main power for a few minutes - the idea here is to clear out any "live" state that is in the bios.  Then restart the NAS and see if the system starts to resync.