Compaq ProLiant CL380 User Manual page 233

H-10 Compaq ProLiant CL380 User Guide
Figure H-6 shows an Active/Passive Failover Mode. Note that all disk access
is through a single CR3500 Controller. This means that the disk I/O load
cannot be balanced across the two CR3500 Controllers. The Active/Passive
Failover Mode should only be used when there is a single logical drive being
used in the shared storage area.
Server
Node 1
SCSI
Adapter
6
2A
Host
Host Port 0
Side
(Channel 0)
Bus
CR3500
Disk
Drive Bus
(Channel 2)
Side
Bus
A = Active
P = Passive
Figure H-6. Active/Passive Failover Mode
3A
Host Port 1
Host Port 0
(Channel 1)
(Channel 0)
Internal Shared Disks
Server
Node 2
SCSI
Adapter
7
2P 3P
Host
Side
Host Port 1
(Channel 1)
Bus
CR3500
Disk
Drive Bus
(Channel 2)
Side
Bus
Repeater to
4214 External
Storage