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
Introduction
12 Modular SAN Array 1000 User Guide
Array Accelerator Batteries
The Array Accelerator has two rechargeable and replaceable NiMH battery packs.
Under normal operating conditions, these should last for three years before
replacement is necessary. They are continuously recharged via a “trickle”
charging process whenever the MSA1000 storage system is powered on.
The battery packs protect data on the Array Accelerator against equipment failure
or power outage for up to four continuous days.
Note: Temperature, age, and cache size may affect battery life.
This also applies if the Array Accelerator is removed from the MSA1000
Controller. When power is restored to the MSA1000 storage system, an
initialization process writes the preserved data to the disk drives. This is
particularly important for data that has been cached by a posted-write operation,
but has not yet been written to the hard drives.
Note: The batteries on a new MSA1000 Controller may be discharged when the
board is first installed. In this case, a Power-On Self-Test (POST) message will be
displayed on the controller display panel when the controller is powered on, indicating
that the Array Accelerator is temporarily disabled. No action is required on your part,
since the internal circuitry will automatically recharge the batteries. Recharging the
batteries can take up to 4 hours. The MSA1000 Controller will function properly during
this time, although without the performance advantage of the Array Accelerator. When
the batteries are charged to 90 percent of their capacity, the Array Accelerator is
automatically enabled.
Depending on the status of the array accelerator, including a low battery charge,
informational or error messages may be displayed on the controller’s LCD panel.
For a listing of cache module LCD messages, see the definitions for LCD
messages 60 through 79 in the “Controller Display Messages” appendix.
For detailed array accelerator or battery replacement instructions, see the
“Operation and Management” chapter.
230941-005_MSA1000_UG.book Page 12 Thursday, April 17, 2003 5:53 PM