Hi We have just added two DS2246 shelves containing 1.2TB 10K SAS disks to a FAS3240 filer. Since the new disks are unique to the new shelves (ie no existing spares of that type), I came up with the following two choices for RAID group size: (A) 3 x 15 and three spares (B) 2 x 23 and two spares What are the pros and cons, please, of these choices or can you think of a better layout, perhaps? Regards, Richard.
i think i'd be looking option B as well... the only thing i'd look for is when you create new aggregates and a new raid group, make sure you manualy select the disks to go in the RG, otherwise you will potentially end up with the disk in the preveious shelf been in the new RAID group, alhtough technically this isn't a problem, if you are thinking about logical boundaries to manage your raw disks, then it's a consideration.
Re: Recommended RAID group size in an aggregate spanning 2 DS2246 shelves & 1.2TB 10K SAS disks