We have just connected an additional shelf of 600GB 15kSAS DS4243.
Currently my controller which I'm adding the shelf to has 2 x RG (16 Disks) - RG0 has 16 disk and RG1 has 6 disks. That leaves 2 spare
What is the best option about adding this new shelf? Do I leave the RG at 16 disks? If I do to give best performance and balance I have to use 26 disks which leaves only 1 spare.
Do I increase the RG size to 23 and use 24 disks so the RG are balanced?
Thanks in advanced!
It is a dual-controller system, right?
Are you adding all 24 new disks to one of the controllers only? If you don't tweak anything, then you will end up wit a pretty neat setup IMHO:
- RG0 - 16 disks (no change)
- RG1 - 16 disks (6 old + 10 new)
- RG2 - 14 disks (all new)
- 2 hot-spares
Nothing wrong about this in my view.
That's correct, a dual controller system.
Yes I'm adding all 24 new disks to one of the controllers only.
Thanks for your help, I wanted to check it was right as the warning message about not being balanced was a little off putting!.
RAID groups are very unbalanced now (16+6), but should be fine after adding more disks (16+16+14).
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