H-10
Compaq ProLiant CL380 User Guide
Compaq Confidential – Need to Know Required
Writer:
Marcello Frau
Project:
Compaq ProLiant CL380 User Guide
Comments:
Part Number:
118128-003
File Name:
n-apph SCSI ID Configurations.doc
Last Saved On:
8/28/00 4:55 PM
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
CR3500
Host
Side
Bus
Disk
Side
Bus
Host
Side
Bus
Disk
Side
Bus
Internal Shared Disks
SCSI
Adapter
Host Port 0
(Channel 0)
Server
Node 2
SCSI
Adapter
Drive Bus
(Channel 2)
Host Port 1
(Channel 1)
CR3500
Host Port 0
(Channel 0)
Drive Bus
(Channel 2)
Host Port 1
(Channel 1)
Repeater to
4214 External
Storage
Disk
Disk
Disk
Disk
Disk
Disk
6
2A
2P
3A
3P
7
A = Active
P = Passive
Figure H-6. Active/Passive Failover Mode