Preparing For The Upgrade - IBM TotalStorage DS4000 EXP100 Installation, User's, And Maintenance Manual

v You cannot use this procedure if you have a DS4100 or DS4400 with firmware

Preparing for the upgrade

You must review and complete all of the steps in this section before you complete
the upgrade procedures.
Before you begin: Ensure that you have the latest version of the DS4000 Storage
Manager installed on your DS4000 management station. You can download the
latest version from the following IBM DS4000 support Web site:
http://www-1.ibm.com/servers/storage/support/disk/
For more information about Storage Manager, see the appropriate IBM TotalStorage
DS4000 Storage Manager Installation and Support Guide for your host operating
system.
Complete the following steps to prepare your system for the firmware upgrade
procedures:
Backup your logical drives
Stop I/O using one of the following methods
version 05.42.xx.xx or 06.xx.xx.xx, respectively. In addition, you do not need to
go though this procedure if you have a DS4300 or DS4500 controller with
firmware versions 05.41.5x.xx or 06.xx.xx.xx
Complete a full backup of all logical drives that are defined in the DS4000.
Stop all I/O. If you do not stop I/O, then drives might be marked as Failed
during the download. This can cause the array (or arrays) to be degraded
or failed.
Use one of the following methods to stop I/O from the host server (or
servers) to the logical drives. The methods are listed in order from the most
desirable to the least desirable option.
Note: If you are using in-band management to manage the DS4000
storage subsystem, you cannot use method 1 or method 2.
1. Shut down all host servers that have logical drives mapped to them
(recommended method).
This method might not be feasible if you are using the host server as
the DS4000 management station. In that case, method 2 is the best
choice.
2. Stop all programs, services or processes in the host servers that access
the logical drives. Make sure that you stop any running background
programs, services or processes that write data to the logical drives.
(For example, Microsoft MSCS is a background program that
periodically writes to the Quorum disk.)
If you use this method, also use method 3 to flush I/O from the server
cache to disks.
3. Unmount the file systems to flush I/O from the server cache to disks.
Note: In a Microsoft Windows environment, remove the drive letter or
the mount points of the mapped LUNs, instead of unmounting
the file systems.
4. Remove the logical drive-to-host mappings, using the DS4000 Storage
Manager client.
Appendix A. Upgrading R1-level firmware (DS4300 and DS4500 only)
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