Contents ● 9Understanding RAIDUnderstanding Drive Segments ....................................................................... 75Non-redundant Arrays (RAID 0)..................................................................... 75RAID 1 Arrays ................................................................................................... 76RAID 1 Enhanced Arrays.................................................................................. 76RAID 10 Arrays ................................................................................................. 77RAID 5 Arrays ................................................................................................... 78RAID 5EE Arrays............................................................................................... 79RAID 50 Arrays ................................................................................................. 80RAID 6 Arrays ................................................................................................... 81RAID 60 Arrays ................................................................................................. 81Selecting the Best RAID Level .......................................................................... 82Using the ICP RAID Configuration UtilityIntroduction to the ICP RAID Configuration Utility..................................... 84Running the ICP RAID Configuration Utility ................................................ 84Navigating the ICP RAID Configuration Utility ...................................... 84Using the ACU to Create and Manage Arrays................................................. 84Creating a New Array ................................................................................. 84Managing Existing Arrays .......................................................................... 85Initializing Disk Drives............................................................................... 85Rescanning Disk Drives.............................................................................. 85Secure Erasing Disk Drives......................................................................... 86Using the -Select Utility to Modify Controller Settings .................................. 86Opening a -Select Utility............................................................................. 86Applying Changes and Exiting................................................................... 86Modifying Your Controller’s Configuration............................................. 87General Controller Settings........................................................................ 87SAS-specific Controller Settings ................................................................ 88SATA-specific Controller Settings ............................................................. 88SCSI-specific Controller Settings ............................................................... 89Formatting and Verifying Disk Drives............................................................. 90Locating Disk Drives......................................................................................... 90Identifying Disk Drives..................................................................................... 90Viewing the Event Log ...................................................................................... 91Using the Array Configuration Utility for DOSGetting Started .................................................................................................. 93Working in the ACU Using Menus.................................................................. 93Running the ACU Using Scripts ...................................................................... 94About Playback Mode ................................................................................ 94About Record Mode ................................................................................... 95Creating the Script File Manually .............................................................. 95Array Definition Block Keywords.............................................................. 96Channel Definition Block Keywords—SCSI only..................................... 99