RDM

[tdubb123]

What is a RDM and when would i use a RDM vs a regular vm?

[vmroyale]

Typically you would use RDMs when you want to use Microsoft Cluster Service (MSCS) or you want to make use of SAN snapshots.

[tdubb123]

what other uses is it for?

[vmroyale]

SAN Management agents is another use for RDM.

Check out Chapter 8 of the "Server Configuration Guide" at the for a lot more info about when and why to use them.

Best practice seems to be to only use RDM when you have a very specific need for them, like Microsoft clustering or SAN agents, snaps, etc.