Physical mode RDM data can be migrated to VMDK disks only via cold migration.ģ. Convert Physical RDM to VMDK using Storage vMotion (VM Powered off = Possible)Īs similar to Converting virtual RDM to VMDK using Storage vMotion with Disk format change option, you can convert the physical RDM to VMDK by changing Disk Format to Thick or thin during storage vMotion only When the virtual machine is Powered off. It throws the compatibility errors ” Virtual disk is mapped direct-access LUN in Physical compatibility mode converting it to different disk type is not supported for this operation”Ģ. If you try to Change the Disk format of Physical RDM during Storage vMotion, Storage vMotion is not allowed. It is not possible to Convert Physical RDM to VMDK using disk format option during Storage vMotion when the virtual machine is Powered-on. Physical mode RDM data can be migrated to VMDK disks only via cold migration. Convert Physical RDM to VMDK using Storage vMotion (VM Powered on = Not Possible) Convert Physical RDM to VMDK using Storage vMotion 1. If you do not change the destination format to thick or thin provisioned for an RDM in the advanced section of the migration wizard, only the RDM mapping file will be migrated to the destination datastore. Once storage vMotion is completed, virtual RDM disk will be converted to VMDK. To convert RDM to VMDK, You can use the Advanced option in Storage vMotion ->Change the disk format as “Thin or Thick” from the disk format drop down for the RDM disk, select the destination datastore and proceed with the storage vMotion. You can initiate the storage vMotion of the virtual machine with virtual RDM disks attached. In the below example, I have Hard Disk 3 (1 TB) which is a RAW LUN attached to the virtual machine as virtual compatibility RDM. This operation can be performed when the Virtual machine is in both Powered on or Powered off state. Virtual mode RDM data can be migrated to a VMDK disk with Storage vMotion by selecting the Disk Format from Advance View.
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The same host retains ownership or registration of the virtual machine after Storage vMotion completes. When you perform Storage vMotion, the virtual machine files are physically relocated to a destination datastore. We can convert virtual compatibility RDM disks to VMDK disks during Storage vMotion to different datatsore. Virtual compatibility RDM disks allow RDM to act exactly like a virtual disk file, including the use of snapshots.
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How to Convert RDM to VMDK Convert Virtual RDM to VMDK using Storage vMotion We need to understand how to convert RDM to VMDK and this article will explain you the detailed procedure to convert both virtual and physical RDM disks to VMDK. Instances such as migrating VM across datacenter without having the option to move with RDM disks, Decommission of storage array where RDM LUN is allocated, etc. There could be various instances that we may need to convert RDM to VMDK. Take a look at the 11 differences between RDM physical vs virtual Compatibility Mode. There are two types of RDM Disks ( Virtual Compatibility RDM and Physical Compatibility RDM).
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