Sun Microsystems StorEdge D2 Array Best Practices Manual page 25

0
1 2 3
VPD
180
040
F
180
VHDIC
Sun StorEdge D2
7
Host1
Sun StorEdge D2 Single Bus Configuration (Logical View)
FIGURE 2-1
In a single-bus configuration, the Sun StorEdge D2 in the "0" position (the left ESM
slot as viewed from the rear of the enclosure) communicates with all 12 drive slots,
and two hosts can be connected to the ESM. The 12 drive slots are mapped to SCSI
IDs 0-5 and 8-13. The physical drive slot position corresponding to these SCSI IDs is
illustrated in
FIGURE 2-3
back-end SCSI bus expanders, the "180s." The two back-end SCSI bus expanders
enable the back-end SCSI bus to be isolated into two separate busses in split-bus
mode (see ).
FIGURE 2-2
In single-bus configuration, both host 1 and host 2 can communicate with all 12
drives. The numbers "6" and "7" next to the two host connections represent the SCSI
IDs that are assigned to the initiator in each host. The "F" next to the box with the
"040," the SAF-TE processor, is the SCSI ID of the SAF-TE processor.
8
5 9 A
4
180
VPD
180
VHDIC
6
Host 2
. Note in that each ESM has two front-end and two
FIGURE 2-1
Chapter 2 Hardware Installation and Configuration
C D
B
2-5