ALERT

[Free eBook] Download Infrastructure Monitoring 101: The Power to Predict and Prevent Today

Raw Device Mapping (RDM)

Definition - What does Raw Device Mapping (RDM) mean?

Raw device mapping (RDM) is a method of disk virtualization in VMware that allows virtual machines to use a storage logical unit number (LUN) device to be directly connected to a virtual machine in a storage area network (SAN). This direct connection can boost disk access performance in I/O-intensive operations.

[Free eBook] Essential Guide to Machine Data: Network Machine Data | DOWNLOAD TODAY

Techopedia explains Raw Device Mapping (RDM)

Raw device mapping is one of two schemes that VMware servers can use to access storage. The other method is Virtual Machine File System (VMFS). VMware recommends VMFS for most applications.

Under RDM, a logical unit manager can be directly attached to a virtual machine. Connecting a device directly can improve performance, especially when virtual machines are clustered. RDM is suited to operations that depend on disk I/O, such as high performance computing.

Share this:

Tech moves fast! Stay ahead of the curve with Techopedia!

Join nearly 200,000 subscribers who receive actionable tech insights from Techopedia.