3-3
Cabling and Configuration
Setting First/Second Shelf
This switch enables a shelf to be set as the “First” or “Second” shelf. In Single
shelf configurations this switch should always be set at First. In Dual shelf (daisy-
chained) configurations, one shelf must be set as First and the second shelf must
be set as Second. The switch is located at the rear of the shelf (see Figure 3-1). To
set the shelf to First, the switch should be set to “First”. To set the shelf to Sec-
ond, the switch should be set to “Second”.
Figure 3-1. First/Second Shelf Switch Location
Setting Single/Dual Host
This switch enables a shelf to be set up for single or dual host. A single shelf may
be either single or dual host. In dual shelf configurations both shelves can be set
to single host or dual host, but they must both be the same. The switch is located
at the rear of the shelf (see Figure 3-2). To set a shelf to single host, the switch
should be set to “1”. To set a shelf to dual host the switch should be set to “2”.
Figure 3-2. Single/Dual Host Switch Location
Mute
T
emp
SCSI Out
SCSI In
LV
D
SE
PSU 2
0
1
PSU 2 PSU 1
First/Second Shelf
VEM Host Shelf
2 0/1
1
2
1
2
Mute
T
emp
SCSI Out
SCSI In
LV
D
SE
PSU 2
0
1
PSU 2 PSU 1
Dual/Single Host
VEM Host Shelf
2 0/1
1
2
1
2
