Hi, i need some help with understanding Hard Drives capacity calculations:

I've created RAID5 Group with 5, 146GB (not VAULT) drives - maximum logical capacity is ~534GB.

Using navicli getrg command i've checked the Logical Capacity in blocks and i got 1121115040 (which is complies with what i've created using 512B per block)

Now, when i look at the single disk capacity using navicli getdisk command i'm getting the following: Capacity: 136888 (i assume it's in MB). So doing the same RAID5 group capacity calculation using this number i get (136888 x (5-1) x 1024 x 1024) /512=1121386496

So, there is a difference of 271456 blocks, which is around 132MB.

What do i miss here? I guess the 136888 disk capacity is not the actual available capacity of this drive Does anyone know where can i get the actual numbers for disks available capacities?

Thanks

Alec