User`s guide

Introduction
1.2 SBB Shelf Description
1.2 SBB Shelf Description
The SBB shelf shown in Figure 1–1 can be used in several different cabinet and
orientations. The dimensions of this shelf are as follows:
Dimension Millimeters Inches
Height 150 5.9
Width 445 17.5
Depth 350 13.8
• The capacity of the SBB shelf is eight 3½-inch SBBs.
• As shown in Figure 1–1, the SBB slots are numbered 0 through 7 from right
to left, starting with the slot adjacent to the SCSI connectors.
Figure 1–1 Typical SBB Shelf — Front View
CXO-3617B-PH
(7)
POWER
65432 01
SCSI
CONNECTORS
• There are seven SCSI bus device addresses (that is, target IDs) that are
numbered 0 through 6. These addresses can be assigned to either 3½-inch or
5¼-inch SBBs.
• The slot numbers and the SCSI device addresses are the same for slots 0
through 6. Slot 7 is reserved for the shelf power unit and does not have a
device address.
• There are two 50-pin, high-density, female SCSI connectors on the backplane
adjacent to slot 0.
• The cabinet ac or dc cable distribution unit determines the type of power unit
installed in slot 7.
• Slot 6 can be used for either a storage SBB, a redundant power unit, or
battery backup unit (BBU).
• As shown in Figure 1–2, each shelf has two redundant blowers mounted on
the rear of the shelf.
1–2 Introduction