User guide
Table Of Contents
- MSA1000 User Guide
- Contents
- About this Guide
- Chapter 1: Introduction
- Chapter 2: Operating System Specific Information
- Chapter 3: MSA1000 Setup and Sample Configurations
- Chapter 4: Operation and Management
- Chapter 5: Array Configuration Utility (ACU)
- Installing the ACU on the Server
- Accessing the ACU
- Description of Screen Regions
- Configuring a New Controller
- Modifying an Existing Controller
- Probability of Logical Drive Failure
- Chapter 6: Command Line Interface (CLI)
- CLI Overview
- CLI Setup
- Help Commands
- Display Commands
- Array Controller Configuration Commands
- LUN Management Commands
- Server Connection Commands
- Selective Storage Presentation/Access Control List Commands
- Appendix A: Regulatory Compliance Notices
- Appendix B: Electrostatic Discharge
- Appendix C: Specifications
- Appendix D: Hard Drive Arrays
- Appendix E: Recovering from Hard Drive Failure
- Appendix F: Controller Display Messages
- Appendix G: Recovery ROM and ROM Cloning
- Appendix H: SCSI ID Assignments
- Index
Array Configuration Utility (ACU)
109Modular SAN Array 1000 User Guide
Migrate a Logical Drive
This option lets you alter the stripe size (data block size) or RAID level, or both,
for a selected logical drive. There might need to be unused drive space available
on the array for the migration to be possible, depending on the initial and final
settings for the stripe size and RAID level.
Note: The migration process takes about 15 minutes per gigabyte, or considerably
longer if the controller does not have a battery-backed cache. While migration is
taking place, no other expansion, extension, or migration can occur simultaneously on
the same controller.
1. Back up all data on the logical drive.
Although migration is unlikely to cause data loss, observing this precaution
provides additional data protection.
2. Click Migrate a logical drive and click Begin.
3. Select the logical drive and click Next.
4. Select the new RAID level and click Next.
Only RAID levels that are possible for this configuration are shown. For
example, RAID 5 is not listed if the array has only two physical drives.
5. Select the stripe size and click Finish to accept the changes. (Only stripe sizes
that are possible for this configuration are shown.)
At this point (before clicking Save in the next step), you can arrange to
migrate another logical drive on the same controller by repeating the previous
steps. However, the controller can migrate only one logical drive at a time;
remaining migrations are queued.
6. Click Save.
Migration begins.
To check the progress of a migration, click the icon for that logical drive in the
Configuration View window. A More Information popup window is displayed
that lists the drive status.
230941-005_MSA1000_UG.book Page 109 Thursday, April 17, 2003 5:53 PM