Yes, you can run different RAID levels in the same pool and across different spindle speeds with the when using the latest version of the firmware (v5.x and v6.x). So you can add the new members in any combination you like (one a R10 or both R10, or both R6, or just one as a R6).  APLB (Automatic Performance Load Balancing) will look at various aspects of the IO, disk speed, RAID type and determine the best placement for the volume slices and move data as needed (in the background) to provide the best performance. Just note that because SAS arrays typically have more space, volumes will typically have more slices on the larger capacity array. -joe
Hi all, We are in the process of expanding our storage environment and wanted some guidance on configuring our group/pools. We currently have storage group consisting of one 12TB PS4000E, this is used as mass storage for file servers and mail archiving. All volumes reside in the default storage pool. We have purchased a 24TB PS4100E and a 14TB PS6100X to add to this group. The idea is to migrate the current file server/mail vault data away from the PS4000E so it can be removed from the group and utilized elsewhere in the business. In scenario 1 we add both devices to the group and into separate storage pools and migrate the volumes from the default storage pool to the pool containing the PS4100E. Then remove the PS4000E from the group. In scenario 2 we have the PS4100E and PS6100X in the same storage pool and migrate the data over in the same manner. The group can then distribute the data as it sees fit. In future we will be migrating VM storage over from another group, containing one PS5000. What are the pool and raid level considerations for these scenarios? Raid5 has been recommended for both of the new devices but can they coexist in the same pool and work well with the same raid level? Thanks in advance. Jim
Storage group guidance