SCF Reference Manual for the Storage Subsystem (G06.24+, H06.03+)

Disk Load Balancing
SCF Reference Manual for the Storage Subsystem—529937-007
8-2
Disk Load Balancing Between Processors
For example, if $OPER on the PMF CRU in slot 50 is balanced between the X and
Y fabrics, the primary (-P or -B) disk OR the mirror (-M or -MB) disk has an asterisk
in a detailed INFO ADAPTER display:
Correspondingly, if $OPER on the PMF CRU in slot 55 is balanced between X
and Y, the primary (-P or -B) disk OR the mirror (-M or -MB) disk has an asterisk:
However, these asterisks illustrate an unbalanced situation:
Both halves of the mirrored volume are running on one fabric (in this case, the
Y fabric).
2. To restore the balance between fabrics, switch the primary process to $OPER-P:
-> SWITCH $OPER-P
For detailed guidelines about how to use the SWITCH command, see Changing
the Active Path for a Magnetic Disk on page 7-27.
Disk Load Balancing Between Processors
This subsection describes principles of disk load balancing between processors and
how to achieve an ideal balance. The technique for obtaining an ideal balance
depends on the RVU:
Slot 50:
2 $OPER-MB STARTED 0,298 1,269
…
1 $OPER-P *STARTED 0,298 1,269
Slot 55:
2 $OPER-M *STARTED 0,298 1,269
…
1 $OPER-B STARTED 0,298 1,269
Slot 50:
2 $OPER-MB STARTED 0,298 1,269
…
1 $OPER-P STARTED 0,298 1,269
Slot 55:
2 $OPER-M *STARTED 0,298 1,269
…
1 $OPER-B *STARTED 0,298 1,269
RVU Page
Guidelines for All G-Series RVUs
8-3
Guidelines for G06.11 and Later RVUs 8-3
Guidelines for G06.10 and Earlier RVUs 8-6
PRIMARY Command Function in G06.00 Through G06.10 8-8
PRIMARY Command Function in G05.00 and Earlier 8-11