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HP StorageWorks
XP24000 Disk/Cache Partition User's Guide
Part number: T5214–96004 First edition: June 2007
Legal and notice information
© Copyright 2007 Hewlett-Packard Development Company, L.P.
Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.211 and 12.212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor's standard commercial license.
The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.
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Revision History
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June 2007 |
This edition applies to microcode version 60-01-31-00/00 or later. |
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Contents
About this Guide . . . . . . . . . . . . . . . . . . . . . . . . . . |
7 |
Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
7 |
Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
7 |
Conventions for Storage Capacity Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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Window Illustrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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HP Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
8 |
Subscription Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
8 |
HP Websites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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Documentation Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
8 |
1 Overview of HP StorageWorks XP Disk/Cache Partition . . . . . . . . |
11 |
2 About Disk/Cache Partition Operations . . . . . . . . . . . . . . . |
13 |
Overview of Disk/Cache Partition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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Storage Management Logical Partition (SLPR) . . . . . . . . . . . . . . . . . . . . . . . . . |
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Cache Logical Partition (CLPR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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3 Preparing for Disk/Cache Partition Operations . . . . . . . . . . . . |
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Storage Administrator and Storage Partition Administrator Privileges . . . . . . . . . . . . . . . . |
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Possible Interacting and Conflicting Functions . . . . . . . . . . . . . . . . . . . . . . . . . |
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4 Using the Disk/Cache Partition GUI . . . . . . . . . . . . . . . . |
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The License Key Partition Definition Window . . . . . . . . . . . . . . . . . . . . . . . . . . |
23 |
The Logical Partition Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
27 |
The Storage Management Logical Partition Window . . . . . . . . . . . . . . . . . . . . . . |
28 |
The Cache Logical Partition Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
30 |
5 Performing Disk/Cache Partition Operations . . . . . . . . . . . . . |
33 |
Launching Disk/Cache Partition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
33 |
Storage Management Logical Partition Operations . . . . . . . . . . . . . . . . . . . . . . . |
33 |
Creating a Storage Management Logical Partition Operations . . . . . . . . . . . . . . . . |
33 |
Migrating Resources To and From Storage Management Logical Partitions . . . . . . . . . . . |
34 |
Deleting Storage Management Logical Partitions . . . . . . . . . . . . . . . . . . . . . . |
34 |
Cache Logical Partition Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
35 |
Creating a Cache Logical Partition . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
35 |
Migrating Resources To and From Cache Logical Partitions . . . . . . . . . . . . . . . . . . |
35 |
Deleting Cache Logical Partitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
36 |
Partitioning and Allocating Licensed Capacity . . . . . . . . . . . . . . . . . . . . . . . . . |
36 |
6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . |
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Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
39 |
Displaying an Error Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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A Acronyms and Abbreviations . . . . . . . . . . . . . . . . . . . |
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XP24000 Disk/Cache Partition User's Guide |
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Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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Figures
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..An Example of Storage Management Logical Partition Function . . . . . . . . . . . . |
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..An Example of Cache Logical Partition . . . . . . . . . . . . . . . . . . . . . . |
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..Storage Administrator and Storage Partition Administrator . . . . . . . . . . . . . . |
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..An Example of Performing Manual Migration between SLPRs . . . . . . . . . . . . . |
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..The License Key Partition Definition Window . . . . . . . . . . . . . . . . . . . . |
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..Program Product List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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..Information on the Licensed Capacity of the Program Product . . . . . . . . . . . . . |
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..Partition Status List and Setting Box . . . . . . . . . . . . . . . . . . . . . . . . |
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..Setting Box for Program Product with Unlimited Licensed Capacity or that does Not Depend |
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on Licensed Capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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..Partition Definition Window (Initial Screen or Subsystem Selected) . . . . . . . . . . . |
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..Partition Definition Window (SLPR Selected) . . . . . . . . . . . . . . . . . . . . |
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..Partition Definition Window (CLPR Selected) . . . . . . . . . . . . . . . . . . . . |
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..Select CU Dialog Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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XP24000 Disk/Cache Partition User's Guide |
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Tables
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..Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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..Capacity for the Data in a Hard Disk Drive that is Associated with a CLPR and the |
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Recommended Cache Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . |
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..Available Functions for the Storage Partition Administrator . . . . . . . . . . . . . . |
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..General Troubleshooting for the Disk/Cache Partition Operations . . . . . . . . . . . |
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..Acronyms and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . |
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About this Guide
This user's guide describes and provides instructions for performing Disk/Cache Partition operations on the HP storage system.
The term storage system in this guide refers to an HP StorageWorks XP24000 Disk Array.
Intended Audience
This user's guide assumes that:
•the user has a background in data processing and understands direct-access storage device subsystems and their basic functions,
•the user is familiar with the storage system,
•the user has read and understands both the HP StorageWorks XP24000 Disk Array Owner's Guide and the HP StorageWorks XP24000 Remote Web Console User’s Guide, and
•the user is familiar with the operating system and web browser software on the system hosting the Remote Web Console and Disk/Cache Partition remote console software.
Related Documentation
•HP StorageWorks XP24000 Disk Array Owner's Guide
•HP StorageWorks XP24000 Remote Web Console User’s Guide
•HP StorageWorks XP RAID Manager User’s Guide
•HP StorageWorks XP24000 LUN Manager User’s Guide
•HP StorageWorks XP24000 Remote Web Console Error Codes
You can find related HP StorageWorks documents from the Manuals page of the HP Business Support Center website:
http://www.hp.com/support/manuals.
In the Storage section, click Storage Software and then select the product.
Document Conventions
Table 1 Document Conventions
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Conventions for Storage Capacity Values
HP XP storage systems use the following values to calculate physical storage capacity values (hard disk drives):
• 1 KB (kilobyte) = 1,000 bytes
XP24000 Disk/Cache Partition User's Guide |
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•1 MB (megabyte) = 1,0002 bytes
•1 GB (gigabyte) = 1,0003 bytes
•1 TB (terabyte) = 1,0004 bytes
HP XP storage systems use the following values to calculate logical storage capacity values (logical devices):
•1 KB (kilobyte) = 1,024 bytes
•1 MB (megabyte) = 1,0242 bytes
•1 GB (gigabyte) = 1,0243 bytes
•1 TB (terabyte) = 1,0244 bytes
•1 block = 512 bytes
Window Illustrations
The windows shown in this guide were displayed on a Windows computer with the Internet Explorer browser. The windows may appear different on your computer depending on the operating system and browser being used. Window contents also vary depending on installed program products and the storage system being managed.
HP Technical Support
For worldwide technical support information, see the HP support website: http://www.hp.com/support
Before contacting HP, collect the following information:
•Product model names and numbers
•Technical support registration number (if applicable)
•Product serial numbers
•Error messages
•Operating system type and revision level
•Detailed questions
Subscription Service
HP recommends that you register your product at the Subscriber’s Choice for Business website: http://www.hp.com/go/e-updates
After registering, you will receive e-mail notification of product enhancements, new driver versions, firmware updates, and other product resources.
HP Websites
For additional information, see the following HP websites:
•http://www.hp.com
•http://www.hp.com/go/storage
•http://www.hp.com/service_locator
•http://www.hp.com/support/manuals
Documentation Feedback
HP welcomes your feedback.
8 About this Guide
To make comments and suggestions about product documentation, send a message to storagedocsFeedback@hp.com. All submissions become the property of HP.
XP24000 Disk/Cache Partition User's Guide |
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10 About this Guide
1 Overview of HP StorageWorks
XP Disk/Cache Partition
The HP storage system can connect to multiple hosts and be shared by multiple users, such as different departments or even different companies. This can cause conflicts among the various users. For example, if a particular host issues a large number of I/O requests, the I/O performance of other hosts may decrease. If the various administrators have different storage policies and procedures, or issue conflicting commands, that can cause difficulties. Disk/Cache Partition has two main functions: storage management logical partition (SLPR), and cache logical partition (CLPR).
Storage Management Logical Partition allows you to divide the available storage among various users. A storage system can be shared among several groups that may have different storage administrators. This can cause problems if those administrators have differing or conflicting storage procedures, or if two or more administrators attempt to perform operations on the same logical volume, such as HP StorageWorks XP LUN Expansion (LUSE) or HP StorageWorks XP Virtual LVI/LUN (VLL). The storage management logical partition function can allocate the storage system resources into two or more virtual storage systems, each of which can be accessed only by the storage administrator, the storage partition administrator for that storage management logical partition, and the users for that partition.
Cache Logical Partition allows you to divide the cache into multiple virtual cache memories. If one storage system is shared with multiple hosts, and one host reads or writes a large amount of data, read and write data can require enough of the cache memory to affect other users. The cache logical
partition function creates two or more virtual cache memories, with each allocated to a different host. This prevents contention for cache memory.
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12 Overview of HP StorageWorks XP Disk/Cache Partition
2 About Disk/Cache Partition
Operations
The storage systems can connect multiple hosts and can be shared by multiple departments in an enterprise, and also shared by multiple companies. Under this circumstances, if a host issues a lot of I/O requests, the I/O performance of other hosts may decrease. If a subsystem's administrator of a department or an enterprise performs an inappropriate operation, there is a possibility that data of other departments or companies are leaked or broken. Disk/Cache Partition enables you to prevent these risks. “Overview of HP XP Disk/Cache Partition” on page 11 describes the overview of Disk/Cache Partition and its features.
Overview of Disk/Cache Partition
Disk/Cache Partition is the function to logically partition the resources in the storage system. Disk/Cache Partition contains the Cache Logical Partition function and the Storage Management Logical Partition function.
Cache Logical Partition enables you to partition the built-in cache memory in the storage system into multiple virtual cache memories. Furthermore, by allocating the partitioned virtual cache to a host, the I/O performance of other hosts can be protected from decreasing even if one host issues many I/O requests.
Storage Management Logical Partition enables you to partition a subsystem into multiple virtual subsystems. Because the administrator of the virtual subsystem cannot access the other virtual subsystem that he/she administrates, your data is protected from the risks, such as the data destroyed by other administrators who administrate other virtual subsystem, or the data leaked.
Section “Storage Management Logical Partition (SLPR)” on page 13 describes the Cache Logical Partition and the Storage Management Logical Partition.
Storage Management Logical Partition (SLPR)
Storage system can be shared with the plural organizations, for example, enterprises, and departments within the enterprise. Therefore, the plural administrators who are belonged in the different organizations may manage one subsystem. Under this circumstances, an administrator who is belonged in an organization is potentially destroying the volumes of other organizations. Furthermore, there is a risk of deriving a complicated and difficult management of storage system because of an incorrect operation by an administrator and its influence to the other organizations. The storage management logical partition function of Disk/Cache Partition can allocate all resources of one subsystem, that is, ports and CLPRs, to the plural virtual subsystem. Each virtual subsystem can be accessed by each administrator only. Therefore, the risks of which an administrator destroys the volumes of other organization, and the data of an organization leaks can be prevented. Figure 1 on page 14 shows an example of which one subsystem is partitioned to two virtual subsystems. Each virtual subsystem is allocated to two enterprises respectively. In this case, the subsystem administrator of enterprise A can manage the virtual subsystem of enterprise A, but cannot manage one of enterprise B. By the same token, the subsystem administrator of enterprise B can manage the virtual subsystem of enterprise B, but cannot manage one of enterprise A.
The virtual subsystem that is created by the storage system's partitioned referred to as the SLPR (storage management logical partition). Up to 32 SLPRs including SLPR0 which is provided as a default can be created in one subsystem. See “Launching Disk/Cache Partition” on page 33 for creating SLPR.
Note: Though you usually need the license key to use the Storage Management Logical Partition function of Disk/Cache Partition, you may create up to 4 SLPRs (including SLPR0) without the license key.
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