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Multiple volumns on RN104 with 16TB limit
AIUI this model (2014 vintage) uses a 32-bit ARM CPU and thus has a hard limit on volume size of 16TB. I currently have 4x5TB for a usable volume of 15TB. 5TB drives are becoming difficult to obtain so when disks fail I need to replace them with larger units. I have had one failure, and replaced it with a 6TB unit, albeit using only 5TB of that disk. I know that if I replace all four with 6TB units, I can't expand the volume to 18TB, but if I were to replace them with 8TB disks, could I create an additional volume in the remaining space? That is to say, is the documented 16TB limit on these units total usable capacity or just individual volumes?
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cmjcf wrote:
is the documented 16TB limit on these units total usable capacity or just individual volumes?
There was a 16 TB limit early on, but that was removed a long time ago (in the 6.4.0 firmware released Oct 2015).
So you can go with larger disks.
Avoid desktop class though - many models (including some Seagate Barracudas) are SMR. You also want to be careful with WD Reds in the 2-6TB range. The newer EFAX series uses SMR technology. The older EFRX are fine (as are EFAX drive 8 TB or larger). Ironwolf drives are good choices.
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