VMware vSphere

Hi all

I'm using VM with RDMs (C Drive is Virtual disk)

I have to migrate this VM, so I try migrate using advanced option, but it affect RDMs too.

RDM disks are physical, I know they can not be migrated, and I don't need migrated to virtual disks.

How can I migrate only drive C to a different datastore?

My stupid idea is detach the RDM to VM for a moment.

I'd appreciate your advice!

Regards.

Hi  MICDROP,

There is a drop down for storage when you select 'Configure per disk'. Drop down and change datastore only for C: drive.

For example refer attached screenshot

Hi  

Thank for reply.

Is there another way?? 

Is the drop-down option grayed out for the non-rdm disks ? If not, then you should still be able to migrate just those disks and the RDM disks will remain intact.

Hi.

https://kb.vmware.com/s/article/1005241

I found the KB as above.

Perhaps in my case, I have to detach RDM disks and migrate C drive, re-attach RDM disks.. : )

You go the right KB there. Yes, you can detach the physical RDMs and attach them post migration of C: drive

Detaching the disk might work.
Another option would be a cold migration.


Please keep in mind that for the RDM to work the RDM lun has to be presented to the destination host. 

Are you able to storage vMotion the single disk?

Else, I would try a cold migration.