Table of Contents
Advertisement
5. Switching from the original to the new storage subsystem.
50
IBM System Storage DCS Series with Gen2 controllers Hard Disk Drive and Storage Enclosure Installation and Migration
Guide
expansion enclosures to the new storage subsystem configuration,
perform the appropriate steps in step 6 on page 51 to prepare the new
storage subsystem for use.
v Turn off the power to the new storage subsystem controller and remove
the two drives (along with the additional storage enclosure, if attached).
Continue with step 4c to replace the controller in the original storage
subsystem with the new controller.
c. Save the full configuration of the original storage subsystem into an SMcli
script file. Be sure to select the check boxes for storage subsystem settings,
logical drive configurations, logical drive-to-LUN map definitions, and
topology before you proceed with the configuration save. Ensure that the
location that you are saving to is not any of the logical drives that are
mapped from the original storage subsystem.
d. Delete any FlashCopy images of the logical drives.
e. Delete any VolumeCopy logical drive pairs.
f. Delete any remote mirror relationships.
g. Delete any hosttoLUN mapping definitions in the original storage
subsystem.
To switch from the original to the new storage subsystem, complete the
following steps:
a. Perform one of the following tasks to export arrays, depending on the
availability of hot-spare drives and unconfigured drives in the storage
subsystem:
v If hot-spare drives or unconfigured hard disk drives are installed in the
original storage subsystem, export all of the defined arrays.
v If no hot-spare drives or unconfigured hard disk drives are installed in
the original storage subsystem, keep one array on the original storage
subsystem and export all the other arrays. One array must be in Optimal
state for the storage subsystem to be up and running.
Note: An error occurs if you try to export the last defined array in a
storage subsystem configuration and no hot-spare drives or unconfigured
drives are installed.
To export an array by using the Storage Subsystem Management window,
right-click the name of the array and click Advanced -> Maintenance ->
Export Array, and follow the instructions in the pop-up window. You can
also use the Start Array array name Export command in the IBM Storage
Manager Client script window. The DS3000 storage subsystem supports
these array functions though the SMcli interface. See the Storage Manager
online help for the SMcli command syntax.
b. Turn off the power to the original controller first; then, turn off the power to
the storage enclosures. This is the best practice power-off sequence. See the
documentation that comes with the storage subsystem for details on the
power-off sequence.
Note: The storage subsystem controller must be powered off before the
storage enclosure.
c. Label all the cables that are connected to the original storage subsystem
enclosure.
d. Wait until the LEDs on the storage subsystem chassis are off; then,
disconnect all cables from the storage subsystem chassis.
Advertisement
Table of Contents
