We have SUN A5000 array on Ultra Sparc server (Solaris 2.6). The A5000 currently have all 9Gb hard disks in it. my questions are: 1. how can I detect the hard disk speed (5400, 7200RPM?) in A5000? 2. can I put 18GB or 36 Gb in it and mix with existed 9Gb? 3. can I mix different speed 7200 with 10000rpm hard disk in A5000? Thank you for help.