Long story short: My PR4100 had 4x 6TB drives configured as two RAID1 arrays (Volume_1 for drives 1 & 2, Volume_2 for drives 3 & 4). Volume_1 was almost full. I bought two 16TB drives, swapped firstly Drive 1, letting it rebuild, then secondly Drive 2, letting it rebuild, naively expecting to turn a 6TB RAID1 array to a 16TB RAID 1 array. No such luck - still 6TB. Anyhow, I found a couple of clicks down “Expand RAID” - and followed it - and it looked like it was happening. Took 12 hours, first expanding disc 1 then expanding disc 2. It finished… but still showed 6TB. The process had taken a long time, with discs whirring and warming up, but achieved precisely nothing.
In a fit of pique I clicked the “make use of space” (or whatever it was called) link. A few clicks later and I now have FOUR volumes - the original Volumes 1 and 2 in RAID1, but Volume_3 with an enormous “spanning” 20TB (the bit that I wanted to expand in Volume_1), and Volume_4 with a rather meagre 2GB (which I never knew existed in Drives 3 and 4).
These two new volumes are not RAID but spanning - and therefore not suitable for my purposes. Can anyone guide me through deleting these volumes (or at least Volume_3) and expanding the RAID1 in bays 1 and 2 to 16TB, please? I realise there is the brute force way of backing everything on them up to yet another drive outside of the enclosure and after verification, formatting and recreating the shares from first principles on the two 16TB drives. However, if at all possible I want to avoid losing the existing shares for continuity of access. I fear I may have burned my boat with this Volume_3 creation.
Thanks in anticipation for any suggestions.
