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ST43401N/ND and ST43402ND Reference Manual, Rev. C
Guidelines for I/O cabling
This topic provides recommendations for I/O cabling and lists the parts that
can be used in various cables. There are three general cabling schemes, as
illustrated in the following figures:
• Figure 7 describes how to design cables when the initiator and all the drives
are located in one cabinet
• Figure 8 describes how to design cables when the initiator is located in one
cabinet and all the drives are located in another cabinet
• Figure 9 describes how to design cables when the initiators and drives are
distributed within three cabinets
Refer to the appropriate figure to determine the types of components required
for your installation. All three figures show how drives inside a cabinet are
connected by continuous unshielded I/O cables that have a connector for
each drive. In some cases, these internal cables connect to a bulkhead that
allows external shielded cables to be connected. Shielded cables must be
used if the cables run between cabinets.
Cumulative cable length in a daisy-chain system cannot exceed 25.0m
(82.0 ft) for drives using differential I/O. With single-ended I/O, cumulative
cable length cannot exceed 3.05m (10.0 ft).
Figure 6. Temperature measurement location on the HDA (bottom)
1.75
4.81
11
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