v
Hard disk drives in a RAID array must be supported in the target storage
enclosure. Read the Installation, User's, and Maintenance Guide for the target
storage enclosure to determine compatibility.
v
The target migration storage subsystem must be up and running optimally with
controller firmware 07.xx.xx or later and must be greater than or equal to the
firmware version of the original subsystem.
Note:
For more information, see the “Drive migration limitations” on page 7
section.
Step 1: Preliminary activities
This section describes the procedure to migrate drives from a functioning storage
subsystem configuration to another storage subsystem configuration, if the drives
contain configuration data that you want to preserve. Add such drives to a storage
subsystem only while the power is turned on and the storage subsystem is in
Optimal state. See “Bringing storage subsystems and drive loops into optimal
state” on page 11 for additional information about assessing the state of a storage
subsystem.
To complete the preliminary activities, complete the following steps:
1.
Perform the procedure in Chapter 1, “Prerequisites to adding capacity and
hard disk drive migration,” on page 1.
2.
Stop all programs, services, or processes in the host servers that access the
logical drives that are defined in the migrated hard disk drives. Ensure that
no programs, services, or processes are running in the background that write
data to the logical drives. (For example, the Microsoft MSCS service
periodically writes to the Quorum disk.)
3.
Unmount the file systems to flush I/O from the server cache to disks.
Note:
a.
In a Microsoft Windows environment, remove the drive letter or the
mount points of the mapped LUNs instead of unmounting the file
systems.
b.
See the documentation for your operating system for detailed information
about the unmount procedure.
4.
Back up the logical drives.
5.
Ensure that the storage subsystem controller and NVSRAM of both the source
and destination systems are at or above the levels described in Table 2 on
page 5.
6.
Ensure that the names of the logical drives that are associated with hard disk
drives on both the source and destination systems are unique.
Note:
Periods are not supported as part of label names.
7.
If you have not already, save and store the profile and configuration script
along with the collect all support data bundle of the storage subsystem from
which the drives are migrated.
8.
Remove all storage partition mappings to logical drives in arrays that are to
be moved.
9.
Delete any FlashCopy images of the logical drives that are defined on the
drives that you plan to migrate.
10.
Remove any remote mirror relationships that use the logical drives that are
defined on the drives that you plan to migrate.
16
IBM System Storage DCS Series with Gen2 controllers Hard Disk Drive and Storage Enclosure Installation and Migration
Guide
Summary of Contents for System Storage DCS Series
Page 89: ......
