HDD Replacement - Expected Rebuild Time

quazi_dude wrote:
I have never completed a factory restore. I purchased this in Nov-2011 and first installed 5 x 2TB drives. I only installed the 2 x 3TB in last week. I am not familiar with the restrictions of online expansion, didn't realise there were any, but does mean I cannot expand beyond 10TB of "actual" available space or "theoretical" (5 x 2TB HDDs) space?

What disks were in the NAS when you initially set it up? Or in other words did you install all 5 disks at once? If so, then you would've started out with e.g. 7.3TB of space (not sure what the exact figure would be) which would allow you to expand 8TB further to 15.3TB.

quazi_dude wrote:
I am running Radiator v4.2.19 and noticed the latest version available from the system update is v4.2.20, (v4.2.21 from direct download - not sure why this is different)

The update server hasn't been updated yet with the new firmware. 4.2.21 is the latest.

quazi_dude wrote:
but didn't want to start messing with firmware since everything is currently working fine and I don't have backups of my data if something goes wrong. I was under the impression that my version of firmware is able cater for 3 TB drives.

Yes it should work fine on that firmware.

quazi_dude wrote:
Do you think this might be causing my volumes not to expand, or perhaps the issue mentioned previously?

The online expansion issue would be what I'd first suspect assuming you put one disk in, then powered on and added the other disks later.

Edit: beaten.