SAN Device Virtualization
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
Clearing SDV Changes
If you have performed a SDV task and have forgotten to release the lock by either committing or
discarding the changes, an administrator can release the lock from any switch in the fabric. If the
administrator performs this task, your changes to the pending database are discarded and the fabric lock
The pending database is only available in the volatile directory and is subject to being discarded if the
switch is restarted.
To use administrative privileges and release a locked SDV session, use the clear sdv session command
in EXEC mode.
switch# clear sdv session vsan 2
Guidelines for Downgrading SDV
Prior to SAN-OS Release 3.1(3), SDV did not support virtual initiators and LUN zoning. Consequently,
in SAN-OS Releases 3.1(3) and later, if virtual initiators are configured or SDV devices are configured
as LUN-based members of a zone, a configuration check will indicate that downgrading to SAN-OS
Release 3.1(2) may be disruptive and is therefore not recommended.
Downgrading With Virtual Initiators Configured
If SDV virtual initiators are configured, you will be unable to downgrade to SAN-OS release 3.1(2)..
This incompatibility is a loose one–it will only warn users before a downgrade. It is recommended that
you remove the virtual initiator configuration or shut down the initiator port so that there are no
inconsistencies in the downgraded version.
We also recommend that users trigger a manual discovery on all the switches before configuring the
virtual initiators; in fact, you can trigger the discovery before proceeding to the downgrade by entering
the following commands.
switch# discover scsi-target local os all
switch# discover scsi-target remote os all
Downgrading with SDV LUN Zoning Configured
Following are the downgrade scenarios when SDV LUN zoning is configured:
OL-16184-01, Cisco MDS SAN-OS Release 3.x
Real initiator and SDV virtual target with LUN
SDV virtual initiator and real target with LUN
SDV virtual initiator and SDV virtual target with LUN
SDV Requirements and Guidelines
Cisco MDS 9000 Family CLI Configuration Guide