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Suggestion for x-raid3
This is a suggestion for a hopefully smarter utilization of disks-arrays of disks of different sizes. Say that I have 3 disks of 1 TB each. I buy a 3 TB disk and put it into the empty slot, after s...
Here's how X-RAID2 works with 2x1TB and 2x3TB disks
There is a RAID-5 layer of 4x1TB giving 3TB of space, and a RAID-1 layer of 2x2TB giving 2TB of space. This gives 5TB of space in total. Of course disk manufacturers consider 1TB = 1000^4 bytes whereas the NAS like most computers considers 1TB = 1024^4 bytes. So 5000*1000^3/1024^3 = 4657GB (roughly). There are of course overheads as well.
If you have not got the expansion you expected (still have less than 3TB of space) please take a look at What To Do When Expansion Doesn’t Start
X-RAID(1) found on Sparc ReadyNAS only uses the capacity of the smallest disk. X-RAID2 (found on x86 and ARM ReadyNAS) is how I described above.
There is a RAID-5 layer of 4x1TB giving 3TB of space, and a RAID-1 layer of 2x2TB giving 2TB of space. This gives 5TB of space in total. Of course disk manufacturers consider 1TB = 1000^4 bytes whereas the NAS like most computers considers 1TB = 1024^4 bytes. So 5000*1000^3/1024^3 = 4657GB (roughly). There are of course overheads as well.
If you have not got the expansion you expected (still have less than 3TB of space) please take a look at What To Do When Expansion Doesn’t Start
X-RAID(1) found on Sparc ReadyNAS only uses the capacity of the smallest disk. X-RAID2 (found on x86 and ARM ReadyNAS) is how I described above.
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