EVA5000 - adding 27 146GB disks

[Karthic]

EVA5000

DG1 - 74 disks - protection level single
36*56(10k)
72*5(10k)
146*13(15k)

DG2 - 83 disks - protection level single
72*67(10k)
146*16(15k)

need to add 27 146GB(15k) disks

12 enclosures
11 bays free to add disks

most of the luns are in raid5
used for large databases

we are planning to replace some 36GB disks.
so ungrouping 16 disks from DG1 we can add all the 27 disks to the EVA and assign it to the required DG.

Considering performance,

is it advisable to add a third DG for the new 15k disks?

To improve performance can i restructure my DG to have all 15k disks in a single DG?

[IBaltay · Accepted solution]

Hi,
this doc could help you to configure replace/configure the EVA stuff with regard to the performance best practices:
ftp://ftp.compaq.com/pub/products/storageworks/whitepapers/5982-9140EN.pdf