Disc Drive Scsi Timing; Table 14. Disc Drive Scsi Timing - Seagate Elite 9 Product Manual

Elite 9 Product Manual, Rev. C
11.9

Table 14. Disc drive SCSI timing

Description
Target select time (no arbitration)
Target select time (with arbitration)
Target select to command
Target select to MSG out
Identify MSG to command
Command to status
Command to data (para. in)
Command to data (para. out)
Command to data (write to data buffer)
Command to disconnect MSG
Disconnect MSG to bus free
Disconnect to arbitration (for re-select)
This measures disconnected CMD overhead
Target win arbitration (for re-select)
Arbitration to re-select
Re-select to Identify MSG in
Re-select Identify MSG to status
Re-select Identify MSG to data (media)
Data to status
Status to command complete MSG
Command complete MSG to bus free
Data to save data pointer MSG
Save data pointer MSG to disconnect MSG
Command byte transfer
Next command byte access
Next CDB byte access (byte 2 of 6)
Next CDB byte access (byte 3 of 6)
Next CDB byte access (byte 4 of 6)
Next CDB byte access (byte 5 of 6)
Next CDB byte access (byte 6 of 6)
Next CDB byte access (byte 2 of 10)
Next CDB byte access (byte 3 of 10)
Next CDB byte access (byte 4 of 10)
Next CDB byte access (byte 5 of 10)
Next CDB byte access (byte 6 of 10)
Next CDB byte access (byte 7 of 10)
Next CDB byte access (byte 8 of 10)
Next CDB byte access (byte 9 of 10)
Next CDB byte access (byte 10 of 10)
continued

Disc drive SCSI timing

Waveform Waveform
symbol [1] table [1]
T00 N/A
T01 4.5-1,2
T02 4.5-1
T03 4.5-2
T04 4.5-3
T05 4.5-5
T06 4.5-9
T07 4.5-10
T08 4.5-10
T09 4.5-6
T10 4.5-6,14
T11 4.5-6
T12 4.5-7
T13 4.5-7
T14 4.5-7
T15 4.5-8
T16 4.5-11
T17 4.5-15
T18 4.5-5,8,15
T19 4.5-5,8,15
T20 4.5-14
T21 4.5-14
T22 4.5-4
4.5-4
T23.6.2 4.5-4
T23.6.3 4.5-4
T23.6.4 4.5-4
T23.6.5 4.5-4
T23.6.6 4.5-4
T23.10.2 4.5-4
T23.10.3 4.5-4
T23.10.4 4.5-4
T23.10.5 4.5-4
T23.10.6 4.5-4
T23.10.7 4.5-4
T23.10.8 4.5-4
T23.10.9 4.5-4
T23.10.10 4.5-4
65
Typical Max
< 1 µs < 250 µs
2.31 µs 2.36 µs
3.33 µs 3.34 µs
1.51 µs 1.54 µs
3.34 µs 3.36 µs
Command dependent
Command dependent
Command dependent
Command dependent
Command dependent
0.64 µs 0.68 µs
Command dependent
2.8 µs
1.8 µs
1.34 µs
Command dependent
Command dependent
Command dependent
1.0 µs
0.75 µs
4.5 µs
0.75 µs
0.04
0.55 µs 0.56 µs
0.10 µs 0.10 µs
0.09 µs 0.10 µs
0.13 µs 0.14 µs
0.13 µs 0.14 µs
0.59 µs 0.60 µs
0.14 µs 0.14 µs
0.13 µs 0.14 µs
0.12 µs 0.12 µs
0.11 µs 0.12 µs
0.10 µs 0.10 µs
0.09 µs 0.10 µs
0.13 µs 0.14 µs
0.12 µs 0.12 µs