Hi there - I have a 6 bay ReadyNas and I have three 5 TB hard drives installed. However, It is only showing 7.19 of free space (with 1.62 used) instead of the expected 15 TB with these five drives. It is Raid 5. Any suggestions? Thanks!!
There is a disk that is used for parity with some over head on each of the disks for redundancy. We do not have 5TB listed since they are no longer a common drive capacity, but you can get the 4TB and 6TB to get the average number that you would be expected in your RAID volume.
Hi there - I have a 6 bay ReadyNas and I have three 5 TB hard drives installed. However, It is only showing 7.19 of free space (with 1.62 used) instead of the expected 15 TB with these five drives. It is Raid 5. Any suggestions? Thanks!!
The rule for XRAID single redundancy is to sum the disks and subtract the largest.
So 3x5 TB gives you a 10 TB array, not 15. That's also the correct size for RAID-5 btw. The remaining 5 TB is used to create redundancy. The NAS reports space in TiB (1024*1024*1024*1024 bytes), not TB (1000*1000*1000*1000 bytes).
10 TB is the same as 9.09 TiB. You are seeing about 8.8 TiB, which is a bit short.
