Why do you want to limit the amount of disks in a CPG? Utilise the wide striping and make ALL of your SAS drives into a single R5 CPG. Then use ALL of your SAS drives to make a R1 CPG. You will get much better performance at about 40-60GB written or more by using wide striping.
The only time I ever restrict CPGs to specific hard disks is to test performance benifits of wide striping and illustrate that more drives in a CPG is better.
_________________ PEAR-Motion
2xNode 3PAR StoreServ 7200 4xNode 3PAR Storeserv 7400 with LFF and SFF 2xNode 3PAR Storeserv 10400
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