Hard drives with equal capacity specs are not really equal in size, e.g. I have two 4TB disks with the following capacities:
Disk 1: 4,000,752,599,040 bytes Disk 2: 4,000,786,153,472 bytes
Afaik a 4 TB drive has at least 4,000,000,000,000 bytes.
I read that one should make a RAID partition 100MB smaller than the disks full capacity to ensure that future disks will still be functioning in the same RAID even if they are slightly smaller.
I also read that someone had 1GB more space available than specified (a difference of more than 100MB compared to my drives).
How do you handle those situations, do you ensure that a RAID partition is never larger than the hard drive capacity specification?