Changing the DISK SIZE of a VM (Windows XP)

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August 31, 2012 by aubreykloppers

I looked all over and finally figured this out, quite easy if you follow the steps:

  • Convert IDE to SCSI:

# cd /vmfs/volumes/<datastore_name>/<vm_name>/


ddb.adapterType = “ide”


ddb.adapterType = “lsilogic” (or ddb.adapterType = “buslogic”)

and save.

  • From VMware Infrastructure/vSphere Client:
  • a. Click Edit Settings for the virtual machine.
  • b. Select the IDE virtual disk.
  • c. Choose to Remove the Disk from the virtual machine.
  • d. Click OK.


  • From the Edit Settings menu for this virtual machine:
  • 1. Click Add > Hard Disk > Use Existing Virtual Disk.
  • 2. Navigate to the location of the disk and select to add it into the virtual machine.
  • 3. Choose the same controller as in Step 3 as the adapter type. The SCSI ID should read SCSI 0:0.

Ok, now you will be able to change the size of the disk…

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