HP StorageWorks XP10000 Disk Array - Manual (Page 13)

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1-1-2 Grouping and Migrating Volumes
You can define a group of storage volumes in advance, so that they are migrated at the same time. By giving
the group an appropriate name , and by setting an explanation of the group as an attribute, you can easily
identify the group of volumes to be migrated.
You can also prevent a group of volumes from migrating accidentally by disabling migration for that group.
1-1-3 Defining Migration Target Volumes
You can define a group of target volumes in advance for a particular purpose, such as access speed, reliability
or bit cost. In response to a request from a user, you can also migrate data whose usage value has dropped
from a high-performance storage subsystem to a low-performance storage subsystem. You can select the
group you need when you are migrating data to suit your specific requirements without having to specify any
detailed conditions. Such volume groups can be created, for example, on a storage subsystem, CLPR, or array
group basis.
1-1-4 Using the External Storage Connection Function
Using the external storage connection function of StorageWorks XP12000/10000, you connect to various types
of storage subsystems using fiber channels, thereby integrating the subsystems into a single virtual storage
subsystem. You select volumes within this storage subsystem as the migration source or target. This means
you can migrate data without worrying about the different types of storage subsystems.
1-1-5 Using HTSM With Clients
You can use Tiered Storage Manager with two types of clients:
• Web client: This client enables you to operate Tiered Storage Manager on a browser. For details about
the window, click the Help button on the window and refer to the displayed Tiered Storage Manager GUI
Help.
• Command Line Interface (CLI) client: This client directly operates the command line, so you can batch
operations such as migration. Refer to the HP StorageWorks XP Tiered Storage Manager CLI Reference
Guide for details.
1-2 Deciding When to Migrate Data
Migrating data helps increase the efficiency of an entire storage system. You can decide to migrate data:
• When the importance of data changes
• When storage performance needs to be improved
• When the storage environment changes
Tiered Storage Manager migrates data between storage subsystems.
NOTE: In this manual, the term domain controller refers to the following products
• StorageWorks XP12000/10000
• StorageWorks XP10000
1-2-1 When the Importance of Data Changes
You can migrate data in line with the concept of Data Lifecycle Management (DLCM), so that data used
frequently is stored in high-performance, high-price storage and data used less frequently is stored in low-
performance, low-price storage. You can migrate data between high- and low-performance storage
subsystems, depending on how often it is used.
Figure 1-3 illustrates migration according to the life cycle of data.
Using Tiered
Storage
Manage
r