I have a new PS4100 with 24 x 300GB disks currently configured with Raid 50.

External consultants have said that we may get performance issues with a single Raid setup with all 22 disk in one array. 

They are suggesting that it would be better to split the disks into several smaller arrays:

Disk group A - 6 disks

Disk group B - 6 disks

Disk group C - 10 disks

2 disks are hot spares.

Questions:

1) Is it possible to configure a PS4100 in this way? I can't see that this is an option from the literature & wizards.

2) If it is possible to configure multiple disk groups will this bring any benefit in practice?