graid3

[Wojciech Puchar]

>> why it can't be say 5 disks+parity?
>
> The reason is in the definition on "RAID 3", which says the updates to the 
> RAID device must be atomic. In some ideal universe, RAID 3 is implemented in 
> hardware and on individual bytes, but here we cannot write to the drives in 
> units other than sectorsize and sectorsize is 512 bytes.

OK i understand - the RAID sectors must be  2^something, so amount of 
drives must be 2^something+1.

thanks