Seagate ST34520N/W/WC/LW/LC, ST36530N/W/WC manual Interconnect characteristics for LVD I/O circuits

Models: ST34520N/W/WC/LW/LC ST36530N/W/WC ST39140N/W/WC/LW/LC

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Medalist Pro Installation Guide, Rev. B

27

Table 5a. Interconnect characteristics for LVD I/O circuits

 

Maximum distance between

 

terminators (meters) [1] [3] [5]

 

 

 

 

Interconnect

Fast-5

Fast-10

Fast-20

Fast-40

 

 

 

 

 

Point-to-point interconnect

25

25

25

25 [2]

(2 devices)

 

 

 

 

 

 

 

 

 

Daisy-chain interconnect

15

15

15

12

(up to 16 devices) [4]

 

 

 

 

 

 

 

 

 

[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]Loads spaced at least 8 inches (20.3 cm) apart (refer to SCSI EPI T10/1143D specification).

[5]See ANSI T10/1302D specification for details.

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Seagate ST34520N/W/WC/LW/LC, ST39140N/W/WC/LW/LC, ST36530N/W/WC manual Interconnect characteristics for LVD I/O circuits