Adding disk shelves to an EVA5K

[Rudy Williams]

Hello--

I want to add 2 new shelves and 12 new disks to my EVA5K 2C6D (making a 2C8D). How do I go through the process of balancing all of the existing and new disks across the shelves?

Do I have to tear everything down, place the disk modules, rebuild all the LUNs and restore all of my data? Or is there a more simple method?

Rudy

[Robert Dobalina]

Once the disks are added to the group the EVA will balance the data across all disks in the group. When this leveling is taking place you could have lower IO so I would do this over a weekend.

No moving of disks, deleting or rebuilding of luns will be necessary. The EVA does it itself.

[Vic Pratt · Accepted solution]

Data will be balanced across all the disks once added to the disk group. However, my experience is that it will not automatically reconfigure the RSS to take advantage of the new shelves to give you either a disk group status of Mirrored or Parity. To do that, you **may** be able to selectively ungroup disks one at a time, align the physical disks in groups of 8 (one per shelf) then add all 8 at once to the disk group. Alternatively I've seen that people have shutdown the eva, repositioned the physical disks to align the RSSs with one RSS disk per shelf then restarted **BUT** in every case they've done this with HP support assistance. In other words don't try this at home.

[Rudy Williams]

Thank you for the input.