Question about resizing raid groups. Can one change the number of disks in a raid group on the fly in a netapp filer? I currently have an aggregate with a single raid groups and I would like to add another shelf. So as to reduce the amount of storage I lose can I change the size of the raid group and grow the underlying raid for the aggregate or do I have to start a new raid group?
Brent Ellis Computing Services Group Boston University
You can change the # on the fly. By default the changes will only work on the last RG in the aggregate, but if you raise it you can back-fill older RGs by using the -g option. If you were to lower the RG size it will only affect the last RG.
-- Adam Fox adamfox@netapp.com
________________________________
From: Brent Ellis [mailto:interi@bu.edu] Sent: Tuesday, April 03, 2007 2:51 PM To: toasters@mathworks.com Subject: Can one change the number of disks in a raid group on the fly
Question about resizing raid groups. Can one change the number of disks in a raid group on the fly in a netapp filer? I currently have an aggregate with a single raid groups and I would like to add another shelf. So as to reduce the amount of storage I lose can I change the size of the raid group and grow the underlying raid for the aggregate or do I have to start a new raid group?
Brent Ellis Computing Services Group Boston University
aggr options <aggr> raidsize <#>
From the man page:
raidsize number
The value of this option is the maximum size of a RAID group that can be created in the aggregate. Changing the value of this option will not cause existing RAID groups to grow or shrink; it will only affect whether more disks will be added to the last existing RAID group and how large new RAID groups will be.
Legal values for this option depend on raidtype. For example, raid_dp allows larger RAID groups than raid4. Limits and default values are also different for different types of filer appliances. Those values may change in future releases of Data ONTAP.
-- /* wes hardin */ Dallas Semiconductor/Maxim Integrated Products
Brent Ellis wrote:
Question about resizing raid groups. Can one change the number of disks in a raid group on the fly in a netapp filer? I currently have an aggregate with a single raid groups and I would like to add another shelf. So as to reduce the amount of storage I lose can I change the size of the raid group and grow the underlying raid for the aggregate or do I have to start a new raid group?
Brent Ellis Computing Services Group Boston University
-
Brent Ellis -
Fox, Adam -
Wes Hardin