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Call “HostStorageSystem.ComputeDiskPartitionInfo” for object “storageSystem” on ESXi failed.

July 20, 2014

I recently installed a Samsung SSD in a vSphere ESXi 5.5u1 host. The previously owned drive was removed from a DELL laptop that was running Windows 7. When I attempted to use the vSphere client to Add Storage… I received the error “Call “HostStorageSystem.ComputeDiskPartitionInfo” for object “storageSystem” on ESXi failed.” A 2nd attempt to Add Storage…resulted in the same error.  I knew that the drive had a data partition but had hoped that vSphere ESXi 5.5 would be able to delete it.  Because the drive was installed in a server that was in a remote location (it was in my house, and I was on the road) I wasn’t able to remove it to delete the partitions with my MacBook Pro.  Fortunately I was able to use the partitioning utility partedUtil from the command line of the ESXi host.  If you are experiencing the same problem follow these steps:

1. Open an SSH connection to your ESXi host with PuTTy.
2. Login as root.
3. Type the command esxcfg-scsidevs -l (This command will list all of your SCSI devices, note the t10. address for your disk.
4. Type the command partedUtil get /dev/disks/t10. (You have to add the entire t10. address, use the tab key to prefill) This command will list all of the partitions on the disk.

Screen Shot 2014-07-20 at 1.52.20 AM
5. Type the command partedUtil delete /dev/disks/t10. 1 (You have to add the entire t10. address, use the tab key to prefill, adding a space and the number 1 at the end will delete partition 1, since I only had one partition on my disk I was finished after this command).

Once I had deleted the partition, attempting to Add Storage… using the vSphere client was successful!

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