SCF Reference Manual for the Storage Subsystem (G06.27+, H06.04+)

Disk Load Balancing

SCF Reference Manual for the Storage Subsystem—529937-008

8-18

Maintaining a Disk Load Balance

•

For fabrics, verify each disk IOP is correctly balancing its load between the X and

Y fabrics. See Disk Load Balancing Between Fabrics on page 8-1.

•

For processors, once you have achieved the desired load-balancing scheme, use

the STATUS command periodically to monitor that balance.

If you have configured all SACs in group 02 to be owned by processor 02, type:

-> STATUS ADAPTER $ZZSTO.#*.GRP-2*, DETAIL

If the Primary PID for any IOP is processor 3, an unwanted processor change has

occurred. Use a PRIMARY command to swap processors for that IOP.

STORAGE - Detailed Status ADAPTER \COMM.$ZZSTO.#PMF.GRP-2.MOD-1.SLOT-50

…

SAC \COMM.$ZZSTO.#PMF.SAC-1.GRP-2.MOD-1.SLOT-50:

…

Configured Devices ( group: 2 , module: 1 ):

Slot Name State Substate Primary Backup

PID PID

2 $AOL2-MB STARTED 2,269 3,286

4 $VIRCFG-MB STARTED 2,288 3,267

…