3TB WD red showing up as only 800gb drive after NAS os upgrade

WD Internal Drives Desktop & Mobile Drives
1

I had two WD red 3TB drives in a synology NAS configured as raid. Everything was perfect, until -. I updated the synology OS (DSM) and it seems the drives somehow got corrupted.

  1. I have backups, so I’m not interested in restoring the data on the hdd’s.
  2. both hdd’s seem to be corrrupted (explained below).
  3. I removed one hdd and ran several tests. All test show perfect hdd.
  4. SMART - perfect.
  5. badblocks (linux) - non destructive r/w the whole drive - 0 errors
  6. WD Life Guard - PASS (the only test I didn’t run was the long one).

I’m pretty sure the drive is fine, but it is only showing up as about 800gb. How can I reset this back to 3TB?

I’ve tried:

  1. gparted (linux) - reports 1 partition 800gb
  2. windows disk management - reports 1 partition 800gb
  3. gnome-disk-utility (linux) - reports 1 partition 800gb
2

Hello,

Have you tried writing zeroes to the drive using WD DLG?

Data Lifeguard Diagnostic for Windows

3

Maybe the NAS has to be setup again and the drives reformatted using the NAS?
Had to do that with my cheap Omninas KD20.

4

I put one of the drives back in the NAS and got it working again. It show’s as 3TB. The other drive is the drive in question. I tried reformating it, thinking it might restore it to 3TB. I’ll try putting it back in and see what happens.

But if the NAS can do it, there should be a way to do it outside of the NAS - shouldn’t there?

Thanks

5

Well I guess it all depends how the NAS formats the drive for it’s specific system. I’m pretty sure if I took a drive from my crappy KD20 and put it in your NAS it wouldn’t read it.