Compex Systems Advanced SerialRAID Adapters SA33-3285-02 - Manual (Page 6)

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