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
229Modular SAN Array 1000 User Guide
G
Recovery ROM and ROM
Cloning
Recovery ROM
Each MSA1000 Controller contains ROM (Read-Only Memory), which holds the
firmware that operates the controller. The Recovery ROM feature stores two
complete firmware images in the ROM: one active image and one backup image.
When the controller is powering up, it checks both firmware images to ensure they
are valid. If either one is not, the valid image will be copied on top of the invalid
image to correct it. This is referred to as auto-flashing. All of this functionality is
done automatically by the controller and does not require any user intervention.
230941-005_MSA1000_UG.book Page 229 Thursday, April 17, 2003 5:53 PM