ReadyNAS Ultra 6 Plus.... 18TB -> 24TB

TeknoJnky wrote:
it sounds like you started with 6x 3tb SINGLE redundancy. I'm currently using X-RAID2 with dual-redundancy. I cut&paste volume: Volume C: Online, X-RAID2, 6 disks, 81% of 13 TB used 6x 3tb at dual redundancy would get you about 10-11tb not 13.

6x3TB single redundancy is 15 TB, or 13.6 TiB. So it looks like frusnet (or frontview) was somehow mistaken on dual redundancy.

TeknoJnky wrote:
what does it say on the frontview > volumes page? Wed May 7 09:04:35 EEST 2014 Data volume has been successfully expanded to 15740 GB. this line here says you are already up to 16tb

Well, not quite. The limit is 16 TiB, not 16 TB, so the ceiling is 16384 GiB, not 15740. BTW, 16 TB is 14901 GiB, so he is already above that ceiling.

The 15740 GiB size is consistent with single redundancy though. The 3x4TB+3x3 TB expansion worked. Single redundancy would 17 TB volume size, or 15832 GiB (ignoring snapshots, OS partition space, and other overhead). 15740 GiB sounds close enough, with that overhead subtracted off.

TeknoJnky wrote:
...meaning no matter what, your are not going to expand further without some kind of factory default.

I agree on the bottom line. Expansion to 4x4TB+2x3TB adds another 1 TB to the volume size - or 931 GiB. 15740+931 = 16671, which is over the 16 TiB ceiling.

frusnet - if your goal was to increase your original volume size, then you want single redundancy, not dual. 6x4TB dual redundancy is less space than 6x3TB single redundancy.

So (a) you do need a reset, and (b) that means you need to restore your data from backup, and reconfigure the NAS.
You can save the configuration if you like, but keep in mind that when you rebuild the NAS you
1. Reinstall addons
2. THEN restore the config
3. Finally restore the data.

Since you will need to reset, you might as well use flexraid (raid-5)