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RAID Levels

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Introduction 1.3 RAID Levels 1.3.1 RAID 0 - Data Striping Data blocks are split into stripes based on the adjusted stripe size (for example, 128 KB) and the number of hard disks. Each stripe is stored on a separate hard disk. Significant improvement of the data throughput is achieved using this RAID level, especially with sequential read and write. RAID 0 includes no redundancy. When one hard disk fails, all data is lost. Figure 1-1. RAID 0 - Data Striping 1.3.2 RAID 1 - Disk Mirroring/Disk Duplexing All data is stored twice on two identical hard disks. When one hard disk fails, all data is immediately available on the other without any impact on performance and data integrity. With Disk Mirroring (Figure 1-2) two hard disks are mirrored on one I/O channel. If each hard disk is connected to a separate I/O channel, it is called Disk Duplexing (Figure 1-3). RAID 1 represents an easy and highly efficient solution for data security and system availability. It is especially suitable for installations which are not too large (the available capacity is only half of the installed capacity). Software Installation and User's Guide 17

Section	Page
ICP RAID Software	1
Introduction 1	13
1.1 Using the User Documentation Set	13
1.1.1 Document Formats	14
1.2 About This Guide	14
1.2.1 Installation Guide	15
1.2.2 User’s Guide	16
1.3 RAID Levels	17
1.3.1 RAID 0 - Data Striping	17
Figure 11. RAID 0 - Data Striping	17
1.3.2 RAID 1 - Disk Mirroring/Disk Duplexing	17
Figure 12. RAID 1 - Disk Mirroring	18
Figure 13. RAID 1 - Disk Duplexing	18
1.3.3 RAID 4 - Data Striping With a Dedicated Parity Drive	18
Figure 14. RAID 4 - Data Striping With a Dedicated Parity Drive	19
1.3.4 RAID 5 - Data Striping with Striped Parity	19
Figure 15. RAID 5 - Data Striping with Striped Parity	19
1.3.5 RAID 10 - Combination of RAID 1 and RAID 0	19
Figure 16. RAID 10 - Combination of RAID 1 and RAID 0	20
1.3.6 Levels of Drive Hierarchy Within the ICP RAID Firmware	20
1.3.6.1 Level 1	20
1.3.6.2 Level 2	20
1.3.6.3 Level 3	20
1.3.6.4 Level 4	21
1.4 Transparency of Host Drives	21
1.4.1 Using CD-ROMs, DATs, Tapes, etc.	22
Getting Started 2	24
2.1 Determine the RAID Configuration	24
Table 21. Pre-installation Worksheet (Creating a Host Drive for the Operating System)	25
2.2 Create the RAID Driver Installation Diskette	25
2.2.1 Preferred Method	25
Figure 27. Main Menu	26
Figure 28. Create Diskettes Menu	26
Figure 29. Select an OS to Create	27
2.2.2 Alternative Methods	27
2.2.2.1 Create ICP RAID Driver for Any Supported OS using a Windows Server	27
Figure 210. ICP RAID Splash Screen	28
Figure 211. Select an Operating System Screen	28
2.2.2.2 Create OpenServer ICP RAID Driver	29
2.2.2.3 Create SCO UnixWare ICP RAID Driver	29
2.3 Install the ICP RAID Controller	29
Quick Installation 3	31
3.1 Roadmap for Quick Installation	31
Table 32. High Level Steps for Quick Installation	31
3.2 Create a Bootable Host Drive—RAID 1 Mirrored Array	32
Figure 312. Select Controller	32
Figure 313. Configure Host Drives	33
Figure 314. Create New Host Drive	33
Figure 315. Select Physical Drive	34
Figure 316. Choose Type Menu	34
Figure 317. Host Drive Creation Confirmation	35
Figure 318. Drive Capacity	35
Figure 319. Newly Created Host Drive	36
3.3 Create a Bootable Host Drive—RAID 5 Disk Array with Hot Fix	36
Figure 320. Select Controller	37
Figure 321. Configure Host Drives	37
Figure 322. Create New Host Drive	38
Figure 323. Select Physical Drive	38
Figure 324. Choose Type Menu	39
Figure 325. Host Drive Creation Confirmation	39
Figure 326. Drive Capacity	39
Figure 327. Newly Created Host Drive	40
Figure 328. Progress Window	40
3.4 Microsoft Windows 2000 and Windows NT Quick Installation	41
3.4.1 Minimum Requirements	41
3.4.2 OS Installation Procedures	41
3.4.2.1 Installing Windows Using the Installation Boot Diskettes	42
3.4.2.2 Installing Windows Using the Bootable Windows CD-ROM	42
3.5 Novell NetWare 4.2x, 5.x and 6.x Quick Installation	42
3.5.1 Minimum Requirements	43
3.5.2 OS Installation Procedures	43
3.5.2.1 New Installation of NetWare 4.20 with the SRCRX.HAM Driver	43
3.5.2.2 New Installation of NetWare 5.1x with the SRCRX.HAM Driver	43
3.5.2.3 New Installation of NetWare 6.x with the SRCRX.HAM Driver	44
3.6 SCO UnixWare 7.1.1 and 8.0 Quick Installation	44
3.6.1 Minimum Requirements	44
3.6.2 OS Installation Procedures	44
3.7 RAID Software Suite Quick Installation	45
3.7.1 Microsoft Windows 2000 and NT 4.0	45
Figure 329. RAID Software Setup Splash Screen	45
Figure 330. Setup Type	46
3.7.2 Novell NetWare 4.2x, 5.x and 6.x	46
3.7.2.1 Installing the ICP RAID Controller Tools Kit Package	46
3.7.2.2 Configuring Tools for Remote Access	47
3.7.3 SCO UnixWare 7.1.1 or 8.0	47
Installing Microsoft Windows NT / 2000 / XP 4	48
4.1 Operating System Installation Procedures	48
4.1.1 Pre-Installation Requirements Checklist	48
4.1.1.1 Minimum Hardware Requirements	48
4.1.1.2 Computer System Requirements	48
4.1.1.3 Minimum Software Requirements	48
4.1.2 Installing an Operating System onto a Host Drive	49
4.1.2.1 Create a Host Drive	49
4.1.2.2 Windows 2000 / XP Professional / NT 4.0 Installation Procedures	49
4.1.2.3 Installing the OS	50
4.1.3 Installing an OS onto a Disk Drive not Attached to the ICP RAID Controller	51
4.1.3.1 Windows 2000 / XP Professional / NT 4.0 Installation Procedures	51
4.1.4 Upgrading/Replacing Windows NT 4.0 Server installed on a host drive	52
4.1.4.1 Before you Begin	52
4.1.4.2 Upgrading Windows NT 4.0 to Windows 2000	52
4.1.4.3 Replacing existing Windows NT 4.0 with Windows XP Professional	53
4.1.5 Installation to an Existing OS	54
4.1.5.1 Minimum Requirements	54
4.1.5.2 Installing Drivers for your ICP RAID Controller	55
4.1.6 Replacing Compatible ICP RAID Controllers in Windows 2000 / XP	56
4.1.6.1 If OS Is on a Host Drive Connected to the ICP RAID Controller	56
4.1.6.2 If OS is on an IDE Drive Connected to the Motherboard	57
4.2 Configuring the RAID Configuration Service	57
Figure 431. Access Account Manager	57
Figure 432. Enter User Account and Password	58
Figure 433. Confirm User Account and Password	59
Installing Linux 5	60
5.1 Before you begin	60
5.1.1 Linux Drivers and Updates	60
Table 53. Driver Diskette or Driver Update	60
5.1.2 Available Drivers and Tools on the RAID Software Suite CD- ROM	61
5.1.3 Assumptions About Path Names	61
Table 54. Linux Path Names	61
5.2 General Installation Notes	61
5.2.1 Minimum Hardware Requirements	61
5.2.1.1 Computer System Requirements	61
5.2.1.2 Minimum Software Requirements	62
5.3 Installing Red Hat Linux 7.x on a Host Drive	62
5.4 Installing an ICP RAID Controller onto an Existing Linux Server	63
5.4.1 Installation of Driver Sources from the RAID Software Suite CD- ROM	63
5.5 GDTH Driver Parameters	64
5.5.1 Reservation of SCSI Devices	64
5.5.2 Further Driver Parameters	65
5.6 Installation of ICPCON Monitoring Utility	65
5.6.1 Installation of ICPCON from the RAID Software Suite CD-ROM	65
5.6.2 Using ICPCON Monitoring Utility	66
5.7 Remote Monitoring with the ICP vortex SRCD Remote Access Service	66
5.7.1 SRCD Installation Instructions from the RAID Software Suite CD-ROM	66
Installing Novell NetWare 6	69
6.1 Pre-Installation Requirements Checklist	69
6.1.1 Minimum Hardware Requirements	69
6.1.1.1 Computer System Requirements	69
6.1.2 Minimum Software Requirements	69
6.2 New installation of NetWare 4.2x, 5.xx and 6.x	70
6.2.1 New Installation of NetWare 4.20 with the SRCRX.HAM Driver	70
6.2.2 New Installation of NetWare 5.0 with the SRCRX.HAM Driver	70
6.2.3 New Installation of NetWare 5.1x with the SRCRX.HAM Driver	71
6.2.4 New Installation of NetWare 6.x with the SRCRX.HAM Driver	72
6.3 Adding Drivers and/or ICP RAID Console to an existing NetWare Installation	72
6.3.1 Installing the ICP RAID Driver Package	72
6.3.2 Installing the ICP RAID Controller Tools Kit Package	73
6.3.2.1 Configuring Tools for Remote Access	73
6.4 ASPI Support for NetWare 4.2x, 5.x	74
6.5 Tips and Tricks	74
6.5.1 Last Status Information	74
6.5.2 Adding Additional Capacity after an Online Capacity Expansion	75
Installing SCO UnixWare 7	76
7.1 General Installation Notes	76
7.1.1 Minimum Hardware Requirements	76
7.1.1.1 Computer System Requirements	76
7.1.2 Minimum Software Requirements	76
7.2 Installing the ICP RAID Controller as Boot Controller	77
7.3 Installing the ICP RAID Controller as an Additional Controller	77
7.3.1 No ICP RAID Controller Has Yet Been Configured	77
7.3.2 An ICP RAID Controller Has Already Been Configured	78
7.4 Installing an Operating System onto an Array Drive or Single Disk	78
7.5 Hardware Identifiers of SCSI Devices	79
7.5.1 Host adapter Number (HA)	79
7.5.2 Bus Number, Target ID and LUN	79
7.5.2.1 Configuration Example (1st channel = 0, 2nd = 1, virtual =2)	79
Table 75. Bus Number, Target ID and LUN	80
7.6 Additional Information	80
7.7 Host Drive Removal	81
7.8 Remote Monitoring with the SRCD Remote Access Service	81
7.8.1 SRCD Installation Instructions	81
Installing SCO OpenServer 8	82
8.1 General Installation Notes	82
8.1.1 Minimum Hardware Requirements	82
8.1.1.1 Computer System Requirements	82
8.1.2 Minimum Software Requirements	82
8.1.3 Additional Installation Notes	83
8.1.4 Installing OpenServer on a System with Multiple SCSI or RAID Controllers	84
8.1.5 Installing an Operating System onto an Array Drive or Single Disk	84
8.1.6 Installing the operating system to an Disk Drive not attached to the RAID Card	84
8.2 Instructions on mkdev (ADM) for 3.2v5.x (Open Server)	85
8.2.1 Host adapter Number (HA)	85
8.2.2 UNIX Target ID and LUN	85
8.2.3 Configuration Example	85
Table 86. UNIX Target ID and LUN	86
8.3 Additional Information	86
8.4 Remote Monitoring with the SRCD Remote Access Service	86
8.4.1 SRCD Installation Instructions	87
Installing Berkeley UNIX FreeBSD 9	88
9.1 General Installation Notes	88
9.1.1 Minimum Hardware Requirements	88
9.1.1.1 Computer System Requirements	88
9.1.2 Minimum Software Requirements	88
9.2 Installing an Operating System onto an Array Drive or Single Disk	89
9.3 Installing an OS onto an IDE or SCSI Disk Drive not Attached to the ICP RAID Controller	89
9.4 ICP RAID Controller Installation in an Already Configured FreeBSD System	90
9.4.1 Installation Procedure	90
9.4.2 Un-installation Procedure	90
9.5 Remote Monitoring with the SRCD Remote Access Service	91
9.5.1 SRCD Installation Instructions	91
9.5.1.1 Install the SRCD package	91
9.5.1.2 Configuring SRCD	91
ICP RAID Console 10	93
10.1 ICPCON Features	93
10.2 Installing and Launching ICPCON	94
10.2.1 Launching the ICPCON Program Under NetWare	94
10.2.2 Installing and Launching ICPCON under Windows NT/2000/XP	94
Figure 1034. ICP RAID Splash Screen	95
Figure 1035. Setup Type	96
10.2.3 Installing and Launching ICPCON Under Linux	96
10.2.4 Launching ICPCON Under OpenServer	97
10.2.5 Launching ICPCON Under UnixWare	97
10.2.6 Launching ICPCON Under FreeBSD	97
10.2.7 Un-installing the RAID Software Suite	97
10.3 The ICPCON Program	98
Table 107. Host Drive Types	99
Figure 1036. Select Interface	100
10.3.1 Select Interface	100
Figure 1037. Remote Machine	100
10.3.2 Select Controller	100
Figure 1038. Select Controller	101
10.3.3 Express Setup / Advanced Setup and Monitor Menus	101
Figure 1039. Express Setup and Monitor Menus	101
Figure 1040. Advanced Setup and Monitor Menus	101
10.4 Express Setup	101
10.4.1 Configure Host Drives	102
10.4.1.1 Create New Host Drive	102
Figure 1041. Select Host Drive Screen	102
Figure 1042. Select Physical Drive and Choose Type Screens	103
Figure 1043. Create Host Drive Confirmation	103
Figure 1044. Hard Disk Capacity to Use	104
Figure 1045. SAF-TE Auto Hot Plug	104
Figure 1046. Cluster Popup Window	104
Figure 1047. Newly Created Host Drive	105
Figure 1048. Progress Information: Non-destructive Array Build	106
10.4.1.2 Host Drive Statuses	106
10.4.1.3 Host Drive Screen	108
Figure 1049. Host Drive Menu for an Existing Host Drive	108
10.4.2 Repair Array Drives	109
Figure 1050. Array Drive Summary	110
Figure 1051. Failed Hard Drive	110
Figure 1052. Replace Hard Drive Prompt	110
Figure 1053. Replace Hard Drive Prompt	110
Figure 1054. Add Disk to Array Confirmation	110
Figure 1055. Array Drive Summary	111
Figure 1056. Array Drive Error State Dialog	111
10.5 Advanced Setup	111
10.5.1 Configure Controller	112
Figure 1057. Configure Controller Menu	112
10.5.1.1 Controller Settings	112
Figure 1058. Controller Settings Dialog	112
Table 108. Controller Settings	113
10.5.1.2 Firmware Update	114
Figure 1059. Firmware Update	115
Figure 1060. Firmware Update Warning	115
10.5.1.3 Intelligent Fault Bus	116
10.5.1.4 Non-Intelligent Enclosures	116
Figure 1061. Select Enclosure	117
Figure 1062. Enclosure Slots	117
Figure 1063. Select Disk	117
10.5.1.5 Advanced Settings	118
Figure 1064. Advanced Settings Warning	118
Figure 1065. Advanced Settings Dialog	118
Table 109. Advanced Settings	119
10.5.1.6 Cluster Settings	119
Figure 1066. Cluster Channels Screen	119
Table 1010. Cluster Channels Settings	120
10.5.1.7 Periodic Parity Verify	120
Figure 1067. Periodic Parity Verify Screen	120
Table 1011. Periodic Parity Verify Settings	121
10.5.1.8 Clear Log Buffer	121
10.5.1.9 Remove Enclosure Config.	121
Figure 1068. Remove Configuration Screen	122
10.5.2 Configure Physical Devices	122
Figure 1069. Select Physical Drive	123
Figure 1070. Configure Disk	124
10.5.2.1 SCSI Parameter / Initialize	124
Figure 1071. Initialize Disk	124
Figure 1072. Disk Initialization Confirmation	125
10.5.2.2 Format Disk	126
10.5.2.3 Check Surface	126
10.5.2.4 View Defects/Status	127
Figure 1073. View Defects/Status	127
10.5.2.5 Deinitialize Disk	127
Figure 1074. Select Physical Drive Screen with Initialized and Fragmented Disk	128
Figure 1075. Select Physical Drive Screen with De-initialized Disk	128
10.5.2.6 Lock Disk or Unlock Disk	128
10.5.2.7 Enclosure Status or Enclosure Slot Configuration	129
Figure 1076. Enclosure Status	129
Figure 1077. Enclosure Slots	129
Figure 1078. Block Diagram of a SAF-TE Subsystem	130
10.5.3 Configure Logical Drives	130
Figure 1079. Select Logical Drive	131
10.5.3.1 Create New Logical Drive	131
Figure 1080. Select Physical Drive	131
Figure 1081. Create Single Drive	131
Figure 1082. Drive Size	132
10.5.4 Configure Array Drives	132
Figure 1083. Select Array Drive	132
10.5.4.1 Array Drive Menu for Existing Array Drives	133
Figure 1084. Array Drive Menu	133
Figure 1085. Expand Popup Window	134
Figure 1086. Remove Drive Confirmation	135
Figure 1087. Progress Information	138
10.5.4.2 Create New Array Drive	139
Figure 1088. Create New Array Drive	139
Figure 1089. Choose Type	139
Figure 1090. Strip Size	140
Figure 1091. Choose Build Type	140
Figure 1092. Create Array Drive Confirmation	140
Figure 1093. Drive Size Dialog	140
Figure 1094. Array Drive Status	140
10.5.4.3 Notes on the Configuration of RAID 0, 1, 4, 5 and 10 Arrays Drives	141
10.5.5 Configure Host Drives	141
10.5.5.1 Create New Host Drive	142
Figure 1095. Select Host Drive Screen	142
Figure 1096. Select Physical Drive and Choose Type Screens	143
Figure 1097. Create Host Drive Confirmation	143
Figure 1098. Strip Size	143
Figure 1099. Hard Disk Capacity to Use	144
Figure 10100. SAF-TE Auto Hot Plug	144
Figure 10101. Cluster Popup Window	144
Figure 10102. Newly Created Host Drive	145
Figure 10103. Progress Information: Non-destructive Array Build	146
10.5.5.2 Host Drive Statuses	146
10.5.5.3 Host Drive Screen	146
Figure 10104. Host Drive Menu for an Existing Host Drive	146
Figure 10105. Host Drive Cluster	148
10.5.6 Repair Array Drives	148
10.6 Monitor Menu	148
10.6.1 View Statistics	149
Figure 10106. View Statistics Menu	149
Figure 10107. Physical Drive Statistics	149
Figure 10108. Logfile Name	150
10.6.2 View Events	150
Figure 10109. Controller Events	150
10.6.3 View Hard Disk Info	150
Figure 10110. Hard Disk Information	150
Figure 10111. Hard Disk Information	151
10.6.4 Save Information	151
Figure 10112. Save Information	152
Figure 10113. Screen Service Messages and Async. Events	152
ICP RAID Navigator 11	153
11.1 Introduction	153
11.2 The ICP RAID Navigator Controls	154
11.2.1 The Toolbar	154
Figure 11114. ICP RAID Navigator Toolbar	154
Table 1112. Toolbar Icons	154
11.2.2 The Status Bar	155
Figure 11115. Status Bar	155
11.2.3 File Menu Commands	155
Figure 11116. File Menu	155
11.2.4 View Menu Commands	155
Figure 11117. View Menu	156
11.2.5 Window Menu Commands	156
Figure 11118. Window Menu	156
11.2.6 The Chart Menu	156
Figure 11119. Chart Menu	156
11.2.7 The Configuration Menu Commands	156
Figure 11120. Physical Configuration Menu	157
Figure 11121. Logical Configuration Menu	157
Figure 11122. Refresh Rate Settings Dialog	157
Table 1113. Configuration Menu Refresh Settings	157
11.2.8 Help Menu Commands	158
Figure 11123. Help Menu	158
11.3 Select Controller	158
Figure 11124. Select Controller	158
Figure 11125. Select Controller	159
Figure 11126. Sockets	159
Figure 11127. Access Control	159
11.4 Physical Configuration Window	159
Figure 11128. Physical Configuration Icon	159
Figure 11129. Example of a Physical Configuration and the Controller Settings	160
Figure 11130. Controller Icon	160
Figure 11131. Controller Settings Dialogs	161
11.4.1 Controller Configuration Settings	161
11.4.1.1 Change Settings	161
Table 1114. Controller Settings	161
11.4.1.2 Save Information	162
11.4.1.3 Non-Intelligent Enclosures	162
11.4.2 I/O Processors	163
Table 1115. I/O Processor Icons	163
Figure 11132. Processor Information	163
11.4.2.1 Channel Settings	164
11.4.2.2 Rescan ID(s)	164
11.4.2.3 Hot Plug: Add Disk	164
11.4.3 Direct Access Devices	165
Table 1116. Direct Access Device Icons	165
Figure 11133. Physical Drive Information	166
11.4.3.1 The SCSI Parameter/Initialize	166
Table 1117. Data Transfer Rates	167
11.4.3.2 Check Surface	168
11.4.3.3 Deinitialize Disk	168
11.4.3.4 Lock Disk / Unlock Disk	168
11.4.4 Non-Direct Access Devices (Raw Devices)	169
Table 1118. Non Direct Access Devices	169
11.5 Logical Configuration Window	169
Figure 11134. Logical Configuration Icon	169
11.5.1 Host Drives	170
Table 1119. Host Drive Icons	170
11.5.1.1 Normal Host Drive	170
11.5.1.2 Local Mounted Cluster Drive	170
11.5.1.3 Remote Mounted Cluster Drive	171
11.5.1.4 Private Host Drive Belonging To Another ICP RAID Controller	171
11.5.2 Array Drives	172
Table 1120. Array Drive Icons	173
11.5.3 Logical Drives	174
Table 1121. Logical Drive Icons	174
11.5.4 Physical Drives	174
Table 1122. Physical Disk Icon	174
11.5.5 The Host Drive Information Window	174
Figure 11135. Host Drive Information Window	175
11.5.6 The Array Drive Information Window	175
Figure 11136. Array Drive Information Window	175
11.5.7 The Logical Drive Information Window	176
Figure 11137. Logical Drive Information Window	177
11.5.8 Drive Name	177
11.5.9 Properties (of a Host Drive)	178
Figure 11138. Properties	178
11.5.10 Remove (a Host Drive)	178
11.5.11 Create New (Host Drive)	178
Figure 11139. New Host Drive	179
Figure 11140. Array Build Information Dialog	179
11.5.12 Parity Verify	179
Figure 11141. Parity Verify	180
11.5.13 Progress Information	180
Figure 11142. Parity Verify Progress Information	180
11.5.14 Expand Array	180
Figure 11143. Logical Configuration	181
11.5.15 Add Hot Fix	182
Figure 11144. Add Hot Fix Drive	182
11.5.16 Remove Hot Fix	183
11.5.17 Hot Fix Pool Access	183
11.5.18 Add RAID 1 Component (Mirror a Drive)	183
Figure 11145. Add RAID1 Component	184
11.5.19 Remove RAID 1 Component (Remove a Mirror Drive)	184
11.5.20 Replace Drive	184
11.5.21 The Different States of an Array Drive	185
11.5.21.1 The Ready State	185
Figure 11146. The Ready State	185
11.5.21.2 The Idle State	185
Figure 11147. The Idle State	185
11.5.21.3 The Build / Rebuild State	185
Figure 11148. The Build / Rebuild State	186
11.5.21.4 The Fail State	186
Figure 11149. The Fail State	186
11.5.21.5 The Error State	186
Figure 11150. The Error State	187
11.6 The Statistics Window	187
Figure 11151. Statistics Window Icon	187
Figure 11152. Statistics Window	188
11.7 The Events Window	188
Figure 11153. Events Window Icon	188
Table 1123. Event Window Icons	189
Figure 11154. Controller Events	189
11.8 ICP RAID Navigator Help	190
Figure 11155. ICP RAID Navigator Help	190
11.9 RAID Configuration Service and RAIDMail	191
Figure 11156. Services	191
Figure 11157. RAID Configuration Service	192
Figure 11158. RAID Configuration Service	193
Figure 11159. RAIDMail	193
Figure 11160. Log File Name	194
Figure 11161. Workstation Names	194
Figure 11162. RAIDMail Utility	194
Optional Features A	195
A.1 Server Clustering	195
A.1.1 ICP RAID Controllers in a Cluster Configuration	196
A.1.2 Hardware Installation	196
A.1.3 Using ICP RAID Controllers with SCSI Interfaces	196
A.1.4 Releasing the Cluster Channels	197
Figure A1. Cluster Channels	197
A.1.5 The Microsoft Cluster Server Concept	197
Figure A2. Microsoft Clustering	198
A.1.6 Novell Netware Clustering	199
A.1.6.1. Hardware Requirements and Settings	199
A.1.6.2. Installation of Netware OS and Cluster Services	199
A.1.6.3. The Netware Client	200
A.1.6.4. Information on the Active-Active Failover Scenario	200
A.1.6.5. The Netware Driver and the Tool ICPCON.NLM	200
A.1.6.6. Restrictions	201
A.1.6.7. Notes on the ICP RAID Navigator (ICP RAID Navigator)	201
Figure A3. Channel Information	201
Figure A4. Channel Settings	202
Figure A5. Cluster Administration	202
Figure A6. Cluster Administration	203
Figure A7. Cluster Administration	203
Figure A8. Cluster Administration	204
Figure A9. Logical Configuration	204
A.2 PCI Hot Plug Overview	204
Advanced Features B	206
B.1 Chaining	206
B.1.1 Configuring a Chaining Set Using ICPCON	206
B.1.2 Configuring a Chaining Set Using ICP RAID Navigator	206
Fibre Channel Features C	207
C.1 Boot BIOS Message	207
Figure C1. Fibre Channel Boot BIOS Screen	207
C.2 Physical Device Information	208
C.2.1 Physical Device Configuration Screen	208
Figure C2. Physical Device Configuration Screen	208
C.2.2 Fibre Channel Information	209

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Software Installation and User’s Guide

Introduction

1.3

RAID Levels

1.3.1

RAID 0 - Data Striping

Data blocks are split into stripes based on the adjusted stripe size (for example, 128 KB)

and the number of hard disks. Each stripe is stored on a separate hard disk. Significant

improvement of the data throughput is achieved using this RAID level, especially with

sequential read and write. RAID 0 includes no redundancy. When one hard disk fails, all

data is lost.

Figure 1-1. RAID 0 - Data Striping

1.3.2

RAID 1 - Disk Mirroring/Disk Duplexing

All data is stored twice on two identical hard disks. When one hard disk fails, all data is

immediately available on the other without any impact on performance and data integrity.

With

Disk Mirroring

(

Figure 1-2

) two hard disks are mirrored on

one

I/O channel. If each

hard disk is connected to a separate I/O channel, it is called

Disk Duplexing

(

Figure 1-3

RAID 1 represents an easy and highly efficient solution for data security and system

availability. It is especially suitable for installations which are not too large (the available

capacity is only half of the installed capacity).