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

Managing Magnetic Disks
SCF Reference Manual for the Storage Subsystem—529937-008
7-28
Changing the Active Path for a Magnetic Disk
•
The $D0201 disk process is executing in processor 2.
•
The $D0201 disk is accessed through SACs in two different PMF CRUs.
•
The disk process is using the primary path to access the primary disk.
•
The paths use the X and Y fabrics.
2. Change the active path accessing the primary disk:
-> SWITCH $D0201-B
-P
-M -B
Processor 2
X Y
SCSI Bus 2
SCSI Bus 1
SAC 1
SAC 2
SAC 2
$D0203-P
$D0201-P
$D0207-P
$D0205-P
$D0201-M
$D0205-M$D0203-M $D0208-P
Processor 3
X Y
X
Y
-MB -MB -M -MB -M
-B
-P -B -P -B -P -B
-P
$D0201
$D0203
$D0205
$D0207
$D0208
$D0201’
$D0203’
$D0205’
$D0207’
$D0208’
VST505.vsd
SAC 1