SCSI ID Configurations
H-11
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
Disk Side SCSI Bus
The Disk Side Bus consists of the CR3500 Controller connections to the disk
bus, as well as the actual SCSI disk drives in the shared storage area. Since the
Disk Side Bus is separate from the Host Side Bus, there is no chance for
SCSI ID conflicts with any devices configured on the Host Side Bus.
Figure H-7 shows the SCSI bus numbering for the Disk Bus Side in a standard
ProLiant CL380 configuration with no external expansion shared storage.
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
9 10 11 12 13 14
7
Figure H-7. Disk Side SCSI Bus Numbering
CR3500 Controller Connections
Each CR3500 Controller has a connection to the Disk Side SCSI Bus. These
are automatically set to Initiator SCSI IDs 6 and 7, and cannot be changed.
Since these are on a separate SCSI bus, there is no conflict with the SCSI IDs
6 and 7 that are used for the Compaq 64-Bit Dual Channel Wide Ultra2 SCSI
Controllers in each server node. In fact, these IDs were chosen to be the same
to reduce confusion.