Seagate Enterprise Capacity 3.5 HDD/Savvio 10K Savvio 10K.1 SCSI Product Manua - Page 58
Physical interface
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9.5.1 Synchronous data transfer periods supported In the following tables, M is the synchronous period value (in the transfer rate negotiation message) that represents the associated transfer period and transfer rate values. Table 17 lists the synchronous data transfer periods supported by the drive in DT DATA phase. DT DATA phase is only allowed when using the LVD interface. Table 17: Synchronous DT DATA transfer periods M (decimal) Transfer period Transfer rate (nanoseconds) (megatransfers/second) 8 6.25 160.0 9 12.5 80.0 10 25 40.0 12 50 20.0 25 100 10.0 Transfer rate (Mbytes/second) on wide bus 320.0 160.0 80.0 40.0 20.0 Table 18 lists the synchronous data transfer periods supported by the drive in ST DATA phase. ST DATA phase is allowed with either LVD or SE interface except as noted. Table 18: Synchronous ST DATA transfer periods M (decimal) Transfer period Transfer rate (nanoseconds) (megatransfers/second) 10 25 40.01 12 50 20.0 25 100 10.0 50 200 5.0 1. This transfer rate is only allowed when using the LVD interface. 9.5.2 REQ/ACK offset Savvio SCSI family drives support REQ/ACK offset values from 7 to 63 (3Fh). Offsets of 1 through 6 are negotiated to 0 (asynchronous transfer). 9.6 Physical interface This section describes the connectors, cables, signals, terminators and bus timing of the DC and SCSI I/O interface. See Section 9.8 and Section 9.8.1 for additional terminator information. Figure 14 shows the location of the SCSI interface connector. Details of the physical, electrical and logical characteristics are given in sections following, while the SCSI operational aspects of Seagate drive interfaces are given in the SCSI Interface Product Manual. 9.6.1 DC cable and connector SFF.1 LC model drives receive power through the 80-pin I/O connector. See Tables 20 and 21. 52 Savvio SCSI Product Manual, Rev. D