Device Scsi Id Ranges - Impediment RS-0800-LVD User Manual

RS--0800-LVD User Guide

2.6.2 Device SCSI ID Ranges

Important Ensure that the SCSI IDs of all devices are uniquely defined for the configuration used. Each drive
bay has a unique value which is set as part of a range of IDs. The ID range can be changed using
the Range switch on the rear of the I/O module (See
2.6.2.1 RS-0800-LVD (2 Channel) with 2 ID ranges
The SCSI_ID base address of each drive will be set to a range defined by a combination of an I/O module
mounted range switch, and the drives location within the enclosure. These lines are set via the backplane
logic.
10 ranges are defined, i.e. 0 - 9. These ranges control the start SCSI-ID address with the addresses for
the other 3 drives following on sequentially.
To change device addressing - remove the black cover pad tor reveal the range switch.
In a 2 x 4 Configuration, the range defined by the right I/O module will control the IDs of the right 4 drives
and the left I/O will control the IDs of the left 4 drives (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)
Table 2–2 2 x 4 I/O SCSI_ID
Range
*Indicates that these addresses have been reserved for future SES/SAF-TE requirements.
In a 1 x 8 configuration with a loopback module fitted, the single 2 x 4 I/O module controls the range of
all of the drives by adding 8 to the Hex value, this would be equivalent to setting range 0 on the left I/O
and range 8 on the right I/O or 1 & 9 respectively. In this configuration, only ranges 0 and 1 are active.
All SCSI_ID values are given in Hexadecimal.
22
Device Slot
0 SCSI_ID
1 SCSI_ID
2 SCSI_ID
3 SCSI_ID
4 SCSI_ID
5 SCSI_ID
6 SCSI_ID
7 SCSI_ID
8 SCSI_ID
9 SCSI_ID
Figure
1/1 or 1/3 2/1 or 2/3
0 1
1 2
2 3
3 4
4 5
5 6
6 7
7 8
8 9
9 A
2–7).
1/2 or 1/4 2/2 or 2/4
2 3
3 4
4 5
5 6
6 7
7 8
8 9
9 A
A B
B C
SAF-TE*
D
D
D
D
E
E
E
E
F
F