Defining LUN 0 on OpenVMS
In IBM Spectrum Virtualize™ and in other storage products, LUN 0 is used as the Command Console LUN (CCL), or pass-through LUN.
Note: IBM Spectrum Virtualize notification
messages might appear on a host as ASC/ASCQ errors, such as x2500
(Logical Unit Not Supported), x2900 (POWER
ON, RESET, OR BUS DEVICE RESET OCCURRED), and x3F0E
(Direct Access Device ASC/ASCQ unrecognized).
These errors do not result in any data or access loss.
OpenVMS hosts require volumes with SCSI LUN 0 to be mapped. This action enables an OpenVMS host to recognize any other volumes mapped to the host. By default, the lowest available SCSI LUN ID is used when mapping a volume to a host. However, you can also set the SCSI LUN ID manually when creating a mapping by using the -scsi parameter. The following example creates a mapping with SCSI LUN ID 0:
mkvdiskhostmap -host host_name|host_id -scsi 0 vdisk_name|vdisk_id