HP StorageWorks XP10000 Disk Array - Manual (Page 38)

Creating a Storage Tier 38
4 Creating a Storage Tier
This chapter describes creating a storage tier and includes the following sections:
• About Storage Tiers (section 4-1 )
• Storage Tier Operations (section 4-2 )
• Creating a Storage Tier by Selecting the Storage Tiers Object from a Storage Domain (section 4-3 )
• Creating a Storage Tier Based on a Storage Domain Volume Search (section 4-4 )
For information about viewing a list of storage tiers, searching volumes and changing attribute information, see
9 .
4-1 About Storage Tiers
Set filter conditions for target volumes (such as the array group or RAID level) as the definition of certain
storage tiers. This allows you to select volumes that match those filter conditions for the migration destination
when you perform a migration. For more information on volume filter conditions, see
5 . Applying Filter
Conditions.
You can create multiple storage tiers within a storage domain. The maximum number of storage tiers you can
create within a single storage domain is 100. If you create 101 or more storage tiers, operation of Tiered
Storage Manager cannot be guaranteed.
When you create a storage tier, or when you update an existing storage tier, the storage tier is defined with the
specified volume filter conditions.
• Define by using conditions that can be used for the definition of storage tiers. This means that LDEV
numbers or volume statuses cannot be used to define storage tiers.
• Define by using and or or for all conditions.
Examples of creating a storage tier are as follows:
Example 1: When creating a storage tier for each storage subsystem
Select Storage Subsystem from the volume filter conditions. If you select StorageWorks
XP12000/XP10000 as a filter condition, StorageWorks XP12000/XP10000 is created as the storage
tier.
Example 2: When creating a storage tier for a CLPR
Select CLPR from the volume filter conditions. If you set CLPR1 as filter condition 1 and CLPR0 as
filter condition 2, and then search volumes on the combination of conditions 1 and 2 by OR, all
volumes in CLPR1 and 2 are displayed. Every volume can be created in a separate storage tier. If
you set CLPR1 as a filter condition, a storage tier for CLPR1 is created.
Example 3: When creating a storage tier for an array group
Select Array group from the volume filter conditions. If you set Array group 1-1-1 for filter condition 1,
Array group 1-2-1 for filter condition 2 and Array group 1-2-2 for filter condition 3, and then search
volumes on the combination of condition 1-3 by OR, all volumes in array group 1-1-1, 1-2-1 and 1-2-2
are displayed. All the volumes can be created as a storage tier. If you set Array group 1-2-2 as a filter
condition, a storage tier for Array group 1-2-2 is created.
A storage tier name must be unique within its storage domain. When creating a storage tier that includes a
LUSE volume, make sure that the LUSE volume is in no more than one storage tier. If the LUSE volume is in
more than one storage tier, see
Table 12-3 .
Volumes from one storage tier can also be included in another storage tier. Even if a volume filtered by volume
filter conditions is different, there is no problem.
Figure 4-1 illustrates the relationship between storage tiers and volumes.