Product data
SCSI Addresses
Each disk drive module is identified to the using system by a SCSI address. This
address is related to the slot in which the disk drive module is installed. Although the
SCSI address switch (see “Switch Card Assembly Switches” on page 9) allows the
addresses of the slots to be reversed, do not use reversed settings; they are not
supported on 2104 Models DU3 and TU3.
Table 1 shows the SCSI addresses of the slots.
Note: In the 2104 Model DU3, slot 1 is the leftmost slot (viewed from the front of the
2104). In the 2104 Model TU3, slot 1 is the bottommost slot (viewed from the
front of the 2104).
Table 1. SCSI Addresses of Disk Drive Module Slots
Disk drive module
slot
1234567891011121314
Device SCSI
address
0123456891011121314
Note: If the 2104 is configured for single SCSI bus mode with two SCSI attachments,
SCSI addresses 5 and 6 cannot be used; that is, disk drive module slots 6 and 7
must contain dummy disk drive modules.
The SCSI enclosure services (SES) use address 15 if the Enable Enclosure Services
switch is set to On (see “Switch Card Assembly Switches” on page 9).
Attention: The SCSI address of the SCSI attachment that is connected to the 2104
must be different from the addresses of the installed disk drive modules. When a
second SCSI attachment is connected to a 2104, the SCSI address of that SCSI
attachment must be different from the address of the first SCSI attachment and different
from the addresses of the installed disk drive modules.
Chapter 1. Reference Information 25