You can use the HDS Thunder, Hitachi AMS 200, AMS 500, and AMS 1000, WMS100, and HDS TagmaStore WMS
systems Storage Navigator Modular Graphical User Interface (GUI) to create and delete LUNs. You must
avoid certain creation and deletion scenarios to prevent data corruption.
Creation and
deletion scenarios
For example, you can use the Storage Navigator Modular GUI to create LUN A, delete LUN A, and
then create LUN B with the same unique ID as LUN A. If the 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,
complete the following procedure to add LUNs:
- Create the LUNs by using the Storage Navigator Modular GUI.
- Quiesce all I/O operations.
- Complete either an offline format or an online format of all new LUNs on the controller by 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
system on the fabric.
- Restart the controller. (Model 9200 only)
- After the controller restarts, 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.