H-14
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
Dual Bus Expansion Configuration
In a dual bus configuration, a StorageWorks Enclosure 4214 is used to connect
to two ProLiant CL380s. An optional Dual Bus I/O Module is required, and is
installed in the StorageWorks Enclosure 4214. The Dual Bus I/O Module
splits the SCSI bus into two equal halves, each supporting seven disk drives.
This configuration supports two ProLiant CL380s, with each of them
connected to one side of the Dual Bus I/O Module (see Figure H-9).
When configured with the Dual Bus I/O Module, the enclosure provides two
separate channels that can be used by each of the ProLiant CL380 clusters. In
this configuration, the external storage enclosure has two separate buses that
can be accessed independently of one another. The drive bays on each bus are
addressed as SCSI IDs 0-5 and 8. Each bus is connected via an external SCSI
cable to the CR3500 Controller in the ProLiant CL380. Using this
configuration, seven drives in the external enclosure are seen as an extension
of the six drives in the internal shared storage for each ProLiant CL380 to
provide support for 13 drives for each cluster.
SCSI IDs
Drive Bays
Enclosure 4214
SCSI IDs
Server Node 2
CR3500-1
9 10 11 12 13 14
CR3500-2
ProLiant CL380
Cluster #1
Server Node 1
14
13
12
11
10
9
8
7
6
5
4
3
2
1
8
5
4
3
2
1
0
8
5
4
3
2
1
0
Server Node 2
CR3500-1
9 10 11 12 13 14
CR3500-2
ProLiant CL380
Cluster #2
Server Node 1
Figure H-9. SCSI IDs for Dual Bus Expansion Configuration
