The HDS Thunder, Hitachi AMS 200, AMS 500, and AMS 1000, WMS100, and HDS TagmaStore WMS systems Storage Navigator Modular Graphical
User Interface (GUI) enables you to create and delete LUNs. You must
avoid certain creation and deletion scenarios to prevent data corruption.
Creation and deletion scenarios
For example,
the Storage Navigator Modular GUI enables you to create LUN A, delete
LUN A, and then create LUN B with the same unique ID as LUN A. If the Lenovo Storage V series clustered system is attached, data corruption can occur because the system
might not realize that LUN B is different than LUN A.
Attention: Before you use the Storage Navigator Modular GUI
to delete a LUN, remove the LUN from the storage pool that contains it.
Adding LUNs dynamically
To prevent the existing
LUNs from rejecting I/O operations during the dynamic addition of
LUNs, perform the following procedure to add LUNs:
- Create the new LUNs using the Storage Navigator Modular GUI.
- Quiesce all I/O operations.
- Perform either an offline format or an online format of all new
LUNs on the controller using the Storage Navigator Modular GUI. Wait
for the format to complete.
- Go into the LUN mapping function of the Storage Navigator Modular
GUI. Add mapping for the new LUN to all of the controller ports
that are available to the Lenovo Storage V series system
on the fabric.
- Restart the controller. (Model 9200 only)
- After the controller has restarted, restart I/O operations.
LUN mapping considerations
If LUN mapping
is used as described in the LUN mapping topic, you must restart the
controller to pick up the new LUN mapping configuration. For each storage pool that contains an MDisk that is supported by
an LU on the system, all volumes in those storage pools go offline.