Reserving Disk Drives .....................27
Fast-Write Cache .......................27
Chapter3. RAID Functions and Array States .............29
RAID Functions .......................29
Availability ........................29
Disk Drives ThatAre Not in Arrays ................30
RAID-0Array States ......................31
Good State ........................31
Offline State........................31
RAID-1Array States ......................32
RAID-5Array States ......................33
Good State ........................33
Exposed State .......................33
Degraded State ......................33
Rebuilding State ......................34
Offline State........................34
RAID-5Array State Flowchart ..................35
RAID-10Array States .....................36
Good State ........................36
Exposed State .......................36
Degraded State ......................37
Rebuilding State ......................37
Offline State........................37
Unknown State.......................38
Multiple States .......................38
Chapter4. Using the SSA SMIT Menus ...............39
GettingAccess to the SSA Adapters SMIT Menu ............40
GettingAccess to the SSA Disks SMIT Menu ..............41
GettingAccess to the SSA RAID Arrays SMIT Menu ...........43
Chapter5. 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
Chapter6. Using the RAID Array Configurator ............57
Installing and Configuring SSARAID Arrays ..............58
GettingAccess 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 ThatAre Protected by Hot Spares ..........77
Listing the Disks ThatAre 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