Wednesday, July 11, 2012

Increase Volume Size of vRDM disk in vSphere

Background: I have a server that has multiple volumes with a total space adding up to nearly 3TB and because of the single extent limit of 2TB for VMFS 3.x, I couldn't store all of the data in VMDKs on one volume. So I had get creative and used Virtual Raw Device Maps for the large disks and mapped them to LUNs on the iSCSI storage.

Challenge: One of the volumes recently ran low on disk space, I have capacity on the SAN; how do I increase the volume size of a vRDM. It's straight forward in a VMDK, edit settings of the VM and increase the size of the disk.