The Hitachi TagmaStore AMS 2000 family of 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 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 steps:
- 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 storage system
ports that are available to the
system on the fabric.
- Restart the storage system (Model
9200 only).
- After the storage system 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.