Synchronous Data Transfer; Synchronous Data Transfer Periods Supported; Req/Ack Offset; Table 12. Synchronous Data Transfer Periods - Seagate ST31250N Product Manual

Barracuda 2LP Product Manual, Rev. D
11.5
11.5.1
11.5.2

Synchronous data transfer

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-2 Interface
Product Manual.

Synchronous data transfer periods supported

Table 12 lists the synchronous data transfer periods supported by the
drives.

Table 12. Synchronous data transfer periods

M Transfer period
(decimal) (M times 4 nanoseconds) (mega transfers/second)
25
31
37
50
62
75
87
100

REQ/ACK offset

The maximum REQ/ACK offset supported by Barracuda 2LP drives is
15 (0Fh).
100
125
150
200
250
300
350
400
Transfer rate
10.0
8.0
6.66
5.0
4.0
3.33
2.86
2.5
67