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• iSCSI SAN Configuration Guide

http://www.vmware.com/pdf/vsphere4/r40/vsp_40_iscsi_san_cfg.pdf

Appendix A: Copying data from a VMFS to RDM volume

The export/import CLI command can be used at the ESX Server level to copy data from a VMFS volume to

a raw device mapping volume. Consider an example;

The virtual machine resides on a VMFS volume and has the virtual disk name test.vmdk. The data on

this virtual machine needs to be copied to a RDM volume. Following is an outline of the steps required to

move the data.

Store the data (test.vmdk) that resides on a VMFS volume (for example, vmfsprod) to a temporary

location, say vmimages, using the vmkfstools export function:

For ESX 2.5.x, execute the following command:

vmkfstools –e /vmimages/test1.vmdk /vmfs/vmfsprod/test.vmdk

For ESX 3.x, execute the following command:

vmkfstools –e /vmimages/test1.vmdk

/vmfs/volumes/vmfsprod/test.vmdk

Create a raw device mapping on vmhba0:0:1:0, which is a CLARiiON LUN, and the mapping file

called rdm.vmdk that resides on a VMFS volume (for example, VMFS1):

For ESX 2.5.x, execute the following command:

vmkfstools –r vmhba0:0:1:0 /vmfs/vmfs1/rdm.vmdk

Import the data from vmimages to the mapping file residing on a VMFS (for example, vmfs1),

which points to the RDM volume:

vmkfstools –i /vmimages/test1.vmdk /vmfs/vmfs1/rdm.vmdk

You may see geometry errors after this command is executed. Ignore these errors.

For ESX 3.x, execute the following command:

vmkfstools –i /vmimages/test1.vmdk –d

rdm:/vmfs/devices/disks/vmhba0:0:1:0 /vmfs/volumes/vmfs1/rdm.vmdk

Note: The import command for ESX 3.x creates a raw device mapping volume and imports the

data from VMFS volume. Assign the RDM volume to the virtual machine. Power on the virtual

machine to ensure the data on the virtual machine is intact.

EMC CLARiiON Integration with

VMware ESX Server

Applied Technology 57

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