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Glossary, ACU Array Configuration Utility, ADU Array Diagnostic Utility

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Glossary ACU (Array Configuration Utility) A configuration utility useful for both novices and more experienced RAID users. Obtained either from the SmartStart and Support Software CD or by downloading from the Compaq website (www.compaq.com). ACU-XE (Array Configuration Utility-XE) A browser-based version of ACU that can be used remotely on systems that also run Compaq Insight Manager XE. ADU (Array Diagnostic Utility) A diagnostic tool that collects comprehensive information about the array controllers in a system and lists any problems detected. ARM (Auto-Reliability Monitoring) Also known as surface analysis. A fault management feature whereby hard drives are scanned for bad sectors, and data in the faulty sectors is remapped onto good sectors. Parity data consistency is also checked for drives in RAID 5 or RAID ADG configurations. Operates as a background process. array A set of physical drives configured into one or more logical drives. Arrayed drives have significant performance and data protection advantages over non-arrayed drives. array accelerator A component of some Smart Array controllers that dramatically improves disk read and write performance by providing a buffer. Data integrity is protected by a backup battery and ECC memory. Compaq Smart Array 5i Plus Controller and Battery Backed Write Cache Enabler User GuideGlossary-1

Section	Page
Compaq Smart Array 5i Plus Controller and Battery Backed Write Cache Enabler User Guide	1
Notice	2
Contents	3
About This Guide	7
Important Safety Information	7
Symbols on Equipment	7
Symbols in Text	8
Text Conventions	9
Related Documents	9
Getting Help	10
Compaq Technical Support	10
Compaq Website	10
Compaq Authorized Reseller	10
Reader’s Comments	11
Chapter 1: Features	12
Overview of Controller Features	12
Battery Backed Write Cache Enabler	13
Memory	15
Controller Interface	16
SCSI Support	16
Drive Array Technology	16
Fault Management Features	17
Chapter 2: Installation Overview	19
Chapter 3: Installing the Smart Array 5i Plus Controller and Battery Backed Write Cache Enabler	21
Chapter 4: Updating the System Firmware	23
Running System ROMPaq from the CD	24
Running System ROMPaq from Diskette	24
Creating a System ROMPaq Diskette from the CD	24
Creating a System ROMPaq Diskette from the SoftPaq File	24
Using the Diskette	25
Chapter 5: Updating the Controller Firmware	26
Running Options ROMPaq from the Smart Array Controller Support Software CD	27
Running Options ROMPaq from Diskettes	28
Creating Diskettes Using the Smart Array Controller Support Software CD	28
Creating Diskettes Using the SmartStart and Support Software CD	28
Creating Diskettes Using the SoftPaq File	29
Using the Diskettes	29
Updating the System Partition	30
Chapter 6: Configuring the System	32
Using RBSU	32
Using ORCA	34
Chapter 7: Configuring an Array	35
Using ORCA	37
Using ACU	38
Running ACU from CD	39
Running ACU while Online	39
ACU Screen Descriptions	40
Main Configuration Screen	40
Secondary Screens	44
Typical Manual Configuration Procedures in ACU	51
Creating a New Array	51
Expanding Array Capacity	55
Extending Logical Drive Capacity	58
Migrating RAID Level or Stripe Size	59
Using CPQONLIN	60
Running CPQONLIN	61
Automatic Configuration	61
Manual Configuration	62
Typical Manual Configuration Procedures in CPQONLIN	64
Creating a Custom Configuration for a New Array	64
Adding a Spare Drive	65
Configuring the New Logical Drive	65
Configuring the Controller Settings	65
Expanding an Array	67
Migrating RAID Level or Stripe Size	68
Chapter 8: Installing the Device Drivers	69
Using the Smart Array Controller Support Software CD	69
Using the SmartStart and Support Software CD	69
Updating the Compaq Insight Manager Agents	70
Appendix A: Regulatory Compliance Notices	71
Regulatory Compliance Identification Numbers	71
Federal Communications Commission Notice	71
Class A Equipment	72
Class B Equipment	72
Declaration of Conformity for Products Marked with the FCC Logo, United States Only	73
Modifications	73
Cables	74
Canadian Notice (Avis Canadien)	74
Class A Equipment	74
Class B Equipment	74
Mouse Compliance Statement	74
European Union Notice	75
Japanese Notice	76
Taiwanese Notice	76
Laser Device	77
Laser Safety Warnings	77
Compliance with CDRH Regulations	77
Compliance with International Regulations	77
Laser Product Label	78
Laser Information	78
Battery Replacement Notice	79
Appendix B: Electrostatic Discharge	80
Grounding Methods	81
Appendix C: Drive Arrays and Fault Tolerance	82
What Is a Drive Array?	82
Fault-Tolerance Methods	86
RAID 0—No Fault Tolerance	86
Advantages	86
Disadvantages	86
RAID 1+0—Drive Mirroring	87
Advantages	88
Disadvantages	89
RAID 5—Distributed Data Guarding	89
Advantages	90
Disadvantages	90
Other Fault-Tolerance Options	92
Appendix D: Hard Drive Installation and Replacement	93
General Information About Hard Drive Failure	93
Recognizing Drive Failure	94
Compromised Fault Tolerance	97
Procedure to Attempt Recovery	97
Automatic Data Recovery	98
Failure of Automatic Data Recovery	98
General Aspects of Drive Replacement	99
Drive Failure During Rebuild	100
Minimizing Fatal System Errors During Rebuild	100
Moving Drives and Arrays	101
Upgrading Disk Drive Capacity	103
Expanding and Extending Capacity	103
Appendix E: Probability of Logical Drive Failure	105
Appendix F: POST Error Messages	107
Appendix G: Questions and Answers	123
Glossary	126

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Compaq Smart Array 5i Plus Controller and Battery Backed Write Cache Enabler User Guide

Glossary-1

Glossary

ACU (Array Configuration Utility)

A configuration utility useful for both novices and more experienced RAID users. Obtained

either from the SmartStart and Support Software CD or by downloading from the Compaq

website (www.compaq.com).

ACU-XE (Array Configuration Utility-XE)

A browser-based version of ACU that can be used remotely on systems that also run Compaq

Insight Manager XE.

ADU (Array Diagnostic Utility)

A diagnostic tool that collects comprehensive information about the array controllers in a

system and lists any problems detected.

ARM (Auto-Reliability Monitoring)

Also known as surface analysis. A fault management feature whereby hard drives are scanned

for bad sectors, and data in the faulty sectors is remapped onto good sectors. Parity data

consistency is also checked for drives in RAID 5 or RAID ADG configurations. Operates as a

background process.

array

A set of physical drives configured into one or more logical drives. Arrayed drives have

significant performance and data protection advantages over non-arrayed drives.

array accelerator

A component of some Smart Array controllers that dramatically improves disk read and write

performance by providing a buffer. Data integrity is protected by a backup battery and ECC

memory.