Seagate ST34572W Installation Guide download pdf (Page 28)

26 Barracuda 9LP Installation Guide, Rev. E

[1] For environments where all elements of the bus (cables, device inter-

faces, environmental noise and other parameters) are controlled to

be better than minimally required, it may be possible to extend the

path length and device count.

[2] SCSI devices shall be within a stub length of the termination (.1

meter).

[3] Values specified by data rate shall apply even if a slower data rate is

negotiated.

[4] Low voltage differential (LVD) devices only (“LW” models).

Twisted pair cable should be used with differential transceivers.

Table 4b. Cable characteristics for differential I/O circuits

Interconnect

Maximum distance between

terminators (meters) [1] [3]

Fast-5 Fast-10 Fast-20 Fast-40

Point-to-point interconnect

(2 devices) 25 25 25 25 [2]

Daisy-chain interconnect

(up to 16 devices) 25 25 25 12 [4]

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 59 60

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Seagate ST34572W Installation Guide Page 28