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Reserving Disk Drives .....................27
Fast-Write Cache .......................27
Chapter 3. RAID Functions and Array States .............29
RAID Functions .......................29
Availability ........................29
Disk Drives That Are Not in Arrays ................30
RAID-0 Array States ......................31
Good State ........................31
Offline State........................31
RAID-1 Array States ......................32
RAID-5 Array States ......................33
Good State ........................33
Exposed State .......................33
Degraded State ......................33
Rebuilding State ......................34
Offline State........................34
RAID-5 Array State Flowchart ..................35
RAID-10 Array States .....................36
Good State ........................36
Exposed State .......................36
Degraded State ......................37
Rebuilding State ......................37
Offline State........................37
Unknown State.......................38
Multiple States .......................38
Chapter 4. Using the SSA SMIT Menus ...............39
Getting Access to the SSA Adapters SMIT Menu ............40
Getting Access to the SSA Disks SMIT Menu..............41
Getting Access to the SSA RAID Arrays SMIT Menu ...........43
Chapter 5. Hot Spare Management ................45
Deciding how to Configure Hot Spare Disk Drive Pools ..........45
Choosing How Many Hot Spare Disk Drives to Include in Each Pool ......51
Choosing the Error Threshold (Alarm) Level for a Hot Spare Pool .......51
Rules for Hot Spare Disk Drive Pools ................52
Solving Hot Spare Pool Problems .................53
Chapter 6. Using the RAID Array Configurator ............57
Installing and Configuring SSA RAID Arrays ..............58
Getting Access to the SSA RAID Arrays SMIT Menu ..........59
Adding an SSA RAID Array...................60
Deleting an SSA RAID Array ..................70
Creating a Hot Spare Disk Drive .................72
Changing or Showing the Status of a Hot Spare Pool ..........74
Showing the Disks That Are Protected by Hot Spares ..........77
Listing the Disks That Are in a Hot Spare Pool ............80
Adding a New Hot Spare Pool..................83
Adding Disks to, or Removing Disks from, a Hot Spare Pool........86
iv User’s Guide and Maintenance Information