Getting Started
23
*
Indicates that these addresses have been reserved for future SES/SAF-TE requirements.
All bays use immediate spin start.
Table 2–3
is for the 8 drives as viewed from the front of the enclosure
Note
The loopback module must only be fitted in the right hand I/O module bay (as viewed from the rear).
For U320 operation the cable to the host computer must be no longer than 3 metres and must connect
to the Channel 1 connection on the rear of the enclosure.
2.7 I/O Module Installation
2.7.1 Parts Check List
• 2 x 4 I/O module or Loopback module.
Important
Please check that you have received the correct IO Module variant. Please refer to Section
1.5.7, ”Ultra-320 SCSI I/O Module Specification”
for details.
2.7.2 Drive Address Ranges
Use the Range switch on the rear of the I/O module to change the address range of the drives on their
appropriate channel. (i.e. Left I/O: 1/1, 1/2, 2/1, 2/2 and Right I/O: 1/3, 1/4, 2/3, 2/4 when viewed from the
front)
• Set the Range switch for each channel to the range settings as shown in
Figure 2–15
.
Note:
The loopback module has NO range switch settings are derived from the 2 x 4 I/O module
– see
Table 2–3
in section
2.6.2
above.
Table 2–3
2 x 4 I/O with Loopback Card SCSI_ID
Range
Device Slot
1/1
2/1
1/2 2/2 1/3
2/3
1/4
2/4
SAF-TE*
0
SCSI_ID
0
1
2
3
8
9
A
B
D
1
SCSI_ID
1
2
3
4
9
A
B
C
D
Figure 2–7
IO Module Range Switch and Connectors
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