How to clear SCSI reservation on a disk/LUN

If you need to clear SCSI reservation on a disk or LUN re-assigned from another system or in a "cluster installation went wrong" situation, you will find this SCSIcmd utility very useful. The SCSIcmd utility is a single .EXE file that can be downloaded from the Symantec support web site (Article: TECH72086) and can be used on MS Windows 2000, 2003, 2008 server systems.

The following SCSIcmd commands will help resolve "stuck" reservation issue:

• Display current reservation status (make sure there is no space between -s and the SCSI command scsi_reserved_status):

• Perform SCSI-2 bus reset/break reservation:

• Clear SCSI-3 key and SCSI-3 reservation:

• Get standard SCSI Inquiry:

This example illustrates how to use SCSIcmd to clear "stuck" SCSI reservation on a disk with "Unreadable" status.