Seagate ST31230DC, Руководство по эксплуатации продукта

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46 Product Manual - Hawk 2LP Family (Wide) SCSI-2 (Volume 1), Rev. A
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11.5 Synchronous data transfer
11.5.1 Synchronous data transfer periods supported
Table 11.5-1 and 11.5-2 list Synchronous Data transfer periods supported by the drive. The data transfer period
to be used by the drive and the initiator is established by an exchange of messages during the Message Phase
of operation. See the section on message protocol in the SCSI Interface manual*.
Table 11.5-1. Synchronous data transfer periods for drive
M (Decimal) Transfer period (M times 4 nanoseconds)
25 100
31 125
37 150
50 200
62 250
75 300
87 350
100 400
11.5.2 REQ/ACK offset
Hawk 2LP Family (Wide) drives support a maximum value of 15 (0Fh) for REQ/ACK offset.
11.6 Physical interface
Figure 11.6-1a shows the locations of the physical interface components for the "W/WD" drives. Shown are
the locations of the D.C. power connector, the SCSI interface connector, the I/O line terminators, and the drive
select and option select header.
Other versions of this drive, the "WC" and "DC" model as shown in Figure 11.6-1b, have an 80 pin connector
that has the SCSI I/O signals and the DC power all together in the 80 pin I/O connector. See Figure 11.6.3-
1b and Tables 11.6.3-1c and 11.6.3-1d.
Details of the physical, electrical and logical characteristics are given in paragraphs following, while the SCSI
operational aspects of Seagate drive interfaces are given in the Seagate SCSI Interface Product Manual,
P/N 77738479.
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*SCSI Interface Product Manual, P/N 77738479