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
Recovering from Hard Drive Failure
189Modular SAN Array 1000 User Guide
Replacing a Drive
Replacement drives must have a capacity no less than that of the smallest drive in
the array. Drives of insufficient capacity will be failed immediately by the
Controller before Automatic Data Recovery can begin.
Caution: Sometimes, a drive that has previously been failed by the Controller
may seem to be operational after the system is power-cycled, or (for a
hot-pluggable drive) after the drive has been removed and reinserted.
However, continued use of such marginal drives may eventually result in data
loss. Replace the marginal drive as soon as possible.
A hot-pluggable drive can be removed and replaced at any time, whether the host
or storage system power is on or off. System performance and fault tolerance will
both be affected until the rebuild operation is completed. This can take several
hours, even if the system is not busy while the rebuild is in progress.
When a hot-pluggable drive is inserted, all disk activity on the array is paused
while the new drive is spinning up (usually 10 seconds or so). If the drive is
inserted while power is on, in a fault-tolerant configuration, data recovery onto the
replacement drive will begin automatically (indicated by the blinking online
LED).
Disk drive replacement should be performed as soon as possible. In addition, all
logical volumes on the same array as the drive being replaced should have a
current valid backup.
230941-005_MSA1000_UG.book Page 189 Thursday, April 17, 2003 5:53 PM