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Reusing RAID 1 disk to backup
Hi there,
I have a Readynas 104 with 2 x 3TB disks running as RAID 1. I had to replace one of the disks as it was flaging as having bad sectors. I have since replaced the disk and everything is fine. I now want to re-use the removed disk as a very temp backup however if i drop it into a caddy and connect it to a laptop to clear any data the disk only reports the available 800GB free space.
I have tried gpart trying to locate the RAID information to clear but unable to. Anyone know how I can clear the disk to allow me to recover the lost space. Pref using Ubuntu.
Thanks
amtrakuk1 wrote:
The mystery is why a 3TB drive only reports 1 partition of 800 GB unused space. How can I access the "hidden" c2.8 TB used space?
I think that's because your SATA->USB adapter is limited to a max size of 2 TB drives. If I am right, you need a different adapter - nothing else will work.
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amtrakuk1 wrote:
if i drop it into a caddy and connect it to a laptop to clear any data the disk only reports the available 800GB free space.
Are you really meaning 800 GB free space or do you mean the total size is 800 GB. I am guessing total size, since if this is about free space, you just delete files.
Older USB 2.0 caddies/adapters often don't support GPT drives, so check that first. If yours doesn't, then the only option is to get a new USB 3 one that does.
Hi and thanks for the quick reply. I guess I didnt make myself clear... I want to bascially "zap" (very technicial term) the drive so it is reporting 3TB all the disk space.
The mystery is why a 3TB drive only reports 1 partition of 800 GB unused space. How can I access the "hidden" c2.8 TB used space?
GPARTED only reports a single parition on /dev/sdb of 800 GB unused space.
Just thinking on the fly, would a better option be fitting into a machine and running a disk wiping tool or installing an OS, will that make the full 3TB available?
amtrakuk1 wrote:
The mystery is why a 3TB drive only reports 1 partition of 800 GB unused space. How can I access the "hidden" c2.8 TB used space?
I think that's because your SATA->USB adapter is limited to a max size of 2 TB drives. If I am right, you need a different adapter - nothing else will work.
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