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SCSI Connections
Determining SCSI Bus Length
Fast, Wide Differential SCSI Bus Length
Follow these instructions to calculate your total bus length for the fast, wide
SCSI bus on your system, using Table 21.
1 List all of your internal Fast, Wide SCSI devices in the first column.
2 In the third column, write the lengths of the internal Fast, Wide SCSI bus that cor-
respond to your devices.
3 In the fourth column, write down the lengths of the Fast, Wide SCSI interconnect
cables you are using for your installation. (Cable lengths are listed in subsection
“Cables” in the section on “SCSI Restrictions.”)
4 Add all of the numbers in the third column and write the sum on the subtotal line
at the bottom of the column. Do the same for the fourth column.
5 Add the subtotals together and write the total on the Total Fast, Wide SCSI Bus
Length line.
NOTICE: The total length of the Fast, Wide SCSI bus must not exceed 25 meters (82
feet). If the number you write for Total Fast, Wide SCSI Bus Length is
greater than 25 meters, try configuring your installation with shorter cables.
If you have problems, call your designated service representative.
Subtotals: ______________ + ________
Total Fast, Wide SCSI Bus Length = ______________
(Total fast, wide SCSI bus length not to exceed total of 25 meters [82 feet])
Table 21 Fats, Wide SCSI Bus Length Worksheet for Fast, Wide Differential SCSI Bus
Fats, Wide
Device
Internal Fats, Wide SCSI Bus
Length meters(feet)
Device Internal Length
meters(feet)
External
Cable
Length
meters(feet)
System Unit 1.5 (4.9) N/A
C3034T 1.0 (3.3)
C3035T 1.0 (3.3)
C3036T 1.0 (3.3)