For the capacity calculation of TRAID, you can check the detailed explanation in the first article.timber wrote: ↑11 Jan 2023, 22:05
How do I calculate the capacity of a TRAID manually?
I'm asking because I started off with 5 5TB drives in TRAID which gave me a capacity of about 18TB (capacity seemed to be closer to RAID 5's N-1).
I replaced one of the 5TB with a 14TB drive, followed the instructions and repaired RAID, and I do not see any extra capacity or free space to grow the volume. Ultimately I was going to go through this process over and over till I replaced all 5 drives over the next couple of months.
If you use 5*5TB to create TRAID, then its usable space is the same as RAID 5.
If you replace the 5TB with a 14TB one, the remaining 9TB space will not be used, so the usable space will not change.
You need to replace the second 5TB hard drive with another 14TB for the remaining 9TB to be used. The usable space of the TRAID created by 3*5TB+2*14TB is (5-1)*5TB+(2-1)*9TB=29TB.