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Setting the SCSI IDs for the Drives
Each of the array's three drive bays needs a SCSI ID assigned, whether or not a disk
drive occupies the bay. The three SCSI IDs must be sequential numbers. All SCSI IDs
in the series must not be assigned to another peripheral or SCSI controller. So, for
example, if you plan to assign SCSI IDs 2, 3, and 4, neither 2, 3, nor 4 can be assigned
to any other device. See the following procedure:
"To Determine the Drive Bay's SCSI ID Sequence and Base ID" on page 57
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This section provides example SCSI ID assignment for several configurations:
"Example: Single-Ended SCSI Configuration" on page 52
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"Example: LVD SCSI Configuration" on page 54
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"Example: Mixed Single-Ended and LVD SCSI Configuration" on page 55
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"LVD SCSI Example: Cabling Four Arrays in a Daisy Chain" on page 61
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You set the SCSI IDs for the drives by setting only the base address, which is the first
number in the sequence of SCSI IDs. For example, in the sequence of SCSI IDs 2, 3,
and 4, the base SCSI ID address is 2 (
FIGURE 3-16
See this procedure for how to set the base address:
"To Set the SCSI IDs for the Drives" on page 58
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Example: Single-Ended SCSI Configuration
FIGURE 3-17
connected to a Netra T1 Model 100 or Netra T1 105 server's on-board SCSI port.
Limitations of this configuration include:
The maximum number of Sun StorEdge S1 arrays that can be used for this
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configuration is two, because the Netra T1 servers are single-ended.
SCSI IDs 0 and 1 are used by the host system's internal drives, and SCSI ID 7 is
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used by the SCSI controller.
52
Sun StorEdge S1 Array Installation and Maintenance Manual • April 2003
base + 1
base
2
3
Example of SCSI ID Drive Assignment Sequence
and
show an example with two Sun StorEdge S1 arrays
TABLE 3-2
).
FIGURE 3-16
base + 2
4
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