Thanks, but it doesn't resolve my problem. Here is another way to explain it :
I want to buy one SAS 450Gb 1500RPM disk in order to add it to an aggregate (so it will be usable, it wont be used as spare or parity). How could I know what amount of space I will add with this disk ?
In a training course, they give me this information for FC/SCSI/ATA/SATA disks, I need this information for SAS 450Gb Disks :
Example : FC/SCSI : Disk size 75Gb, right-sized capacity : 68Gb