We have one storage sytem FAS2552 Dual-Controller with 24 hard disks 900GB SAS 10K and one disk shelf 2246 which contains 12 SSD disks 400GB.
With 23 SAS drives (1 drive for spare) we have created one aggregate. On this aggregate we have used a flash pool also with 4 SSD disks.
With the other 8 SSD remaining disks we have created another one aggregate.
So in total we have two aggregates, one with SAS drives (and flash pool) and another one with 8 SSD drives.
In the first aggregate we have created recently another raid group (raid-dp) with three disks of 1.8TB of size.
So the aggregate has different types of disks regarding their size.
Now we want to add 5 x 1.8TB disks.
Which will be a better solution regarding the performance:
- To create another aggregate (a new one) with these 5 x 1.8TB disks or add them in the existing raid group on the first aggregate ?
- If we create another aggregate can the existing raid group with these 3 x 1.8TB move to this new aggregate?
Our concern is regarding the performance. Does a mixed disks (different sizes) aggregate has a lower or worse performance than a aggregate with same size disks?
These 5 x 1.8TB disks will be used for file server service.
Thank you
Ilir