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Quantum Atlas 10K II Ultra 160/m SCSI Hard Disk Drives
C–1
Appendix C
NEGOTIATED RATE INFORMATION PAGE REFERENCE
This appendix provides information about the INQUIRY command’s Negotiated Rate
Information Page that is not provided in Section 5.11.2.7. Specifically, it provides the codes and
meanings for the Transfer Period Factor field (byte 4) and a table that explains the allowable
settings for the QAS, DT, and IU fields (bits 2, 1, and 0, respectively, of byte 7).
C.1
TRANSFER PERIOD FACTOR FIELD
Table C-1 provides the codes and meanings allowed for the Transfer Period Factor field if the
value of PARL (Parallel Protocol, bit 2 of byte 6 of the Negotiated Rate Information Page) is 1.
Table C-2 provides the allowable codes when the value of PARL = 0.
Table C–1 Transfer Period Factor Field Values When PARL = 1
Code
Description
00h – 08h
Reserved.
09h
Transfer period = 12.5 ns (Fast-80 is latched every 12.5 ns). This code is valid only if
the protocol options bits (QAS, DT, and IU) of the page have values selected that
support double transition (DT) data transfers.
0Ah
Transfer period = 25 ns (Fast-40 data is latched every 25 ns).
0Bh
Transfer period = 30 ns (Fast-40 data is latched every 30 ns).
OCh
Transfer period = 50 ns (Fast-20 data is latched using a transfer period of less than or
equal to 96 ns and greater than or equal to 50 ns).
0Dh – 18h
Transfer period = the period factor x 4 (Fast-20 data is latched using a transfer period
of less than or equal to 96 ns and greater than or equal to 50 ns).
19h – 31h
Transfer period = the period factor x 4 (Fast-10 data is latched using a transfer period
of less than or equal to 196 ns and greater than or equal to 100 ns).
32h - FFh
Transfer period = the period factor x 4 (Fast-5 data is latched using a transfer period
of less than or equal to 1020 ns and greater than or equal to 200 ns).
Summary of Contents for Quantum Atlas 10K II 9.2/18.4/36.7/73.4 GB
Page 15: ...Contents Quantum Atlas 10K II Ultra 160 m SCSI Hard Disk Drives xv...
Page 19: ...Contents Quantum Atlas 10K II Ultra 160 m SCSI Hard Disk Drives xix...
Page 25: ...About This Manual 1 4 Quantum Atlas 10K II Ultra 160 m SCSI Hard Disk Drives...
Page 55: ...Installation 3 28 Quantum Atlas 10K II Ultra 160 m SCSI Hard Disk Drives...
Page 69: ...SCSI Description 5 2 Quantum Atlas 10K II Ultra160 m SCSI Hard Disk Drives...
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Page 315: ...Feature Descriptions 6 14 Quantum Atlas 10K II Ultra 160 m SCSI Hard Disk Drives...
Page 321: ...Appendix A Quick Reference A 6 Quantum Atlas 10K II Ultra 160 m SCSI Hard Disk Drives...
Page 363: ...Appendix B SCSI Bus Signal Timing B 42 Quantum Atlas 10K II Ultra 160 m SCSI Hard Disk Drives...
Page 369: ...Index I 4 Quantum Atlas 10K II Ultra 160 m SCSI Hard Disk Drives...
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