Be social and share it with social media, if you feel worth sharing it.Download Disk2vhd (564 KB) Run now from Sysinternals Live. We are done with creating physical compatibility RDM disks in two different methods such as vmkfstools and also using vSphere Web Client. You can choose either store with the virtual machine or select any specific datastore. Select “Physical” under Compatibility Mode and also you can specify the location of the RDM Mapping file. Select the respective LUN to create it as RDM disk in the virtual machine and Click on Ok. Select RDM Disk from the New Device Dropdown Select the virtual machine in the vCenter Server inventory -> Edit Settings. Log in to vCenter Server using vSphere Web Client. Once the RAW LUN is allocated to the ESXi cluster, Follow the below procedure: Create Physical Compatibility RDM Disks using vSphere Web Client Select the VMDK and Click Ok.Ĭlick on Ok to add the RDM disk to the virtual machineĢ. Click on Add.īrowse towards the folder in the datastore in which we have created RDM Mapping file. You can Edit the virtual machine properties -> Select “Existing Hard Disk” from the New Device drop-down. Once the VMware RDM mapping file is created using vmkfstools. You can see the CreateType as “vmfsPassthroughRawDeviceMap” which is nothing but VMware physical RDM disk. You can read the descriptor file “L6.vmdk” contains the information about the RDM mapping file. You can see 2 files ( diskname-rdmp.vmdk & diskname.vmdk) rdm.vmdk is for virtual compatibility RDM and rdmp.vmdk is for Physical compatibility RDM disk. You can validate the RDM mapping files are created using “ls” command in the specified directory. You can use something like VMname-LunID.vmdk. TIP: You can specify the disk name of RDM mapping file in a meaningful way so that it will be easily identified during the maintenance of the LUN’s or disk. CD towards the specific folder where you want to keep the RDM mapping file and execute the below command vmkfstools -z /vmfs/devices/disks/naa.XXXXXXXXXXXXXXXXXXXXXXXXX diskname.vmdk ![]() ![]() To Create Physical Compatibility RDM, you need to know the NAA ID of the physical LUN which we are going to add it as RDM disk to the virtual machine. This simplifies the operation and troubleshooting. ![]() You can create a specific folder to create the RDM mapping file. This will be extremely useful when you have multiple virtual machines sharing the same RDM disks. The only advantage of this method is you can create the physical compatibility RDM mapping file inside any specific folder of the datastore. Create Physical Compatibility RDM Disk using vmkfstoolsĬreating RDM disk Physical compatibility mode using vmkfstools also performs the same operation as what we do it in the Web client. First one is via vmkfstools command (CLI) and the second one is via vSphere Web Client 1. There are 2 simple ways to create Physical compatibility RDM disks. 2 Ways to Create VMware RDM Disks in Physical Compatibility Mode In this article, We are going to looking at the detailed procedure to create VMware RDM disk in Physical Compatibility Mode (RDM Physical). I have already explained the step by step procedure to create virtual compatibility RDM disks. With the VMware RDM in physical compatibility mode, all the physical characteristics of underlying hardware will be exposed. Physical compatibility mode allows direct access of the SCSI device for those applications that need lower level control. We have explained the detailed 11 differences between RDM physical vs virtual Compatibility Mode. As we discussed in the earlier post, There are two types of RDM Disks ( Virtual Compatibility RDM and Physical Compatibility RDM). VMware RDM ( Raw device mapping) is a mapping file that provides direct access to a LUN on an iscsi or fibre channel storage system for a virtual machine. Diff VCenter 5.5 appliance and vCenter on WIndows.
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