Adding several dozens of FC disks to an existing Diskgroup.

[MitVongNam]

Hi Everyone,

What is the Best pratice to add several dozens of FC disks to an existing Diskgroup? Does anyone have a script written in SSSU to achieve this? or I must add one by one via Command View? Any potential gotcha I need to be on the lookout for? Thanks in advance.

[Steven Clementi]

You can add them all at the same time in Command View.

You don't want to do 1 at a time since it will try to re-level the data for everyone.


Are you adding all the same size disks? to a group with the same size disks? (Yes, you can mix sizes).

Upgrade the firmware on the disks before you add them to the group. Makes life easier.

Try to do it when there is less i/o on vdisks from the group.


Steven

[MitVongNam]

Yes, I am adding all the same size disks? to a group with the same size disks.

How to add all the drives at the same time? I am adding them one after another.

[Steven Clementi]

Add all the disks to the EVA... ONE at a time. Wait 60 to 90 seconds between adding disks.


Once all the disks are "seen" in Command View... click on the disk group and click "Add Disks". You type the number of disks to add to the group and click ok/add/w.e


Steven

[MitVongNam]

THANKS.

[CLEB]

Not sure if this is applicable for you but when I was adding another shelf with 12 disks to my EVA4400, HP support recommended to only group 4 disks at a time in Command View.

Apparently this makes sure that the RSS is distributed evenly.