In this case, the disk has one partition. If your disk has partitions, you will see VML identifiers corresponding to the number of partitions, i.e.: “ :1, :2” and so on. So at this point, I was able to locate the VML identifier. To do that, log in with SSH client and issue the following command: The first step is determining the disk you’ll want to use for the RDM (presumably the disk has been physically installed in the server). ESXi Side of Things Step 1 – Find Your Disk I’ll also assume the reader is comfortable on the command line. The majority of the work done will require SSH access to the ESXi server and consequently the unRAID server. Moreover, I won’t delve into the benefits of RDM, I’ll assume the reader knows what it is and is ready and willing to implement RDM on their server. In the enterprise space, there’s definitely a strong, albeit technical reason why an admin would choose Raw Device Mapping (RDM) over VMware’s Virtual Machine File System (VMFS), you can look here if you care to read up on it. In this blog post I’ll show you how to use RDM and configure unRAID to mount that drive on boot. Raw Device Mapping RDM is a method to provide a Virtual Machine with direct access to a local SATA drive connected to a SATA controller. Further consider that using a local datastore is out of the question – presumably becuase the datastore is a rather expensive SSD and space is somewhat of a scarce resource. Say we have a VM that requires access to a rather large disk (greater than 1 Terabyte ). Septemin Virtualization tagged ESXi / RDM / Virtualization by bobbyĬonsider the following scenario.
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