Contents ● 9Backplane Connections .............................................................................. 71SAS Expander Connections........................................................................ 72How is SAS Different from Parallel SCSI? ....................................................... 73Understanding 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 Adaptec RAID Configuration UtilityIntroduction to the ARC Utility....................................................................... 84Running the ARC Utility .................................................................................. 84Navigating the ARC Utility ........................................................................ 84Using the ACU to Create and Manage Arrays................................................. 84Creating a New Array ................................................................................. 84Managing Existing Arrays .......................................................................... 85Initializing Disk Drives............................................................................... 86Rescanning Disk Drives.............................................................................. 86Secure Erasing Disk Drives......................................................................... 87Managing Global Hot Spares ..................................................................... 87Using the ACU to Create and Manage JBODs ................................................ 87Creating a New JBOD................................................................................. 87Managing Existing JBODs.......................................................................... 88Using the ACU to Manage the MaxIQ Pool.................................................... 88Using SerialSelect to Modify Controller Settings............................................. 88Opening SerialSelect.................................................................................... 89Applying Changes and Exiting................................................................... 89Modifying Your Controller’s Configuration............................................. 89Formatting and Verifying Disk Drives............................................................. 91Locating Disk Drives......................................................................................... 91Identifying Disk Drives..................................................................................... 92Viewing the Event Log ...................................................................................... 92Using the Array Configuration Utility for DOSGetting Started .................................................................................................. 94Working in the ACU Using Menus.................................................................. 94Running the ACU Using Scripts ...................................................................... 95