Chapter 1. Prerequisites to adding capacity and hard disk
drive migration
The following notes describe general information that you must consider when
you perform the procedures in this document.
v
Check the controller firmware readme files, the documentation that comes with
your hardware, and this guide for the following information:
– The latest information about storage subsystem and storage enclosure
compatibility
– The latest information and rules about storage enclosure cabling to the
storage subsystem drive port
– Any requirements of the installed microcode and firmware to support the
storage subsystem and storage enclosure
v
To prevent damage to the storage subsystem or to the storage enclosure
backplane, ensure that the hard disk drives are compatible with your storage
subsystem before you install them. Refer to the storage subsystem
announcement letter for information about compatible devices.
v
For more information about the procedures in this document, contact your IBM
marketing representative or authorized reseller.
Preparing the storage subsystem
To prepare the target and source storage subsystems to add storage capacity or
migrate hard disk drives, complete the following steps. Unless it is specified
otherwise, perform the following steps on the target subsystem for adding new
hard disk drive capacity and on both the target and source storage subsystems for
migrating hard disk drives with data.
Attention:
Failure to complete the following steps before you add storage
capacity or migrate hard disk drives might result in loss of data availability or loss
of data.
1.
Complete a full backup of all data on the storage subsystem.
2.
Ensure that the backup was successful.
3.
Verify the hardware compatibility and requirements by reviewing the
information in “Determining the supported number of drives and drive loop
pairs” on page 4 and the storage subsystem announcement letters. If addition
of storage enclosures is required, review “Intermixing storage enclosures” on
page 11 and the cabling information in the Installation, User's, and Maintenance
Guide for any special cabling requirements.
4.
If you want to perform a drive migration between storage subsystems, verify
that the drives can be migrated to the new storage subsystem.
Note:
Currently, drives with disk pools cannot be migrated from one
subsystem to another. The data in the disk pool must be backed up to a tape
or to drives that are part of traditional arrays. Then, the data is restored to
newly created disk pools in another storage subsystem. For more information,
see the “Drive migration limitations” on page 7 section.
5.
Ensure that the storage subsystem has the latest controller firmware,
nonvolatile storage random access memory (NVSRAM), and ESM firmware.
Also, ensure that the installed controller firmware in the storage subsystem
© Copyright IBM Corp. 2008, 2015
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Summary of Contents for System Storage DCS Series
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