Seagate 15K.5 - Cheetah - Hard Drive, Product Manual

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74 Cheetah 15K.5 SCSI Product Manual, Rev. D
9.10 Disc drive SCSI timing
Table 24: Disc drive SCSI timing
These values are not current Cheetah 15K.5 SCSI values, but are listed for information only.
Description
Waveform
symbol [1] Waveform
table [1]
Typical timing
Target Select Time (no Arbitration) T00 N/A <1
μ
s
Target Select Time (with Arbitration) T01 4.5-1,2 1.93
μ
s
Target Select to Command T02 4.5-1 3.77
μ
s
Target Select to MSG Out T03 4.5-2 1.57
μ
s
Identify MSG to Command T04 4.5-3 3.36
μ
s
Command to Status T05 4.5-5 Command Depen-
dent
Command to Data (para. In) T06 4.5-9 Command Depen-
dent
Command to Data (para. Out) T07 4.5-10 Command Depen-
dent
Command to Data (Write to Data Buffer) T08 4.5-10 Command Depen-
dent
Command to Disconnect MSG T09 4.5-6 Command Depen-
dent
Disconnect MSG to Bus Free T10 4.5-6,14 0.52
μ
s
Disconnect to Arbitration (for Reselect)
This measures disconnected CMD over-
head
T11 4.5-6 Command Depen-
dent
Target win Arbitration (for Reselect) T12 4.5-7 3.00
μ
s
Arbitration to Reselect T13 4.5-7 1.60
μ
s
Reselect to Identify MSG In T14 4.5-7 1.39
μ
s
Reselect Identify MSG to Status T15 4.5-8 Command Depen-
dent
Reselect Identify MSG to Data (media) T16 4.5-11 Command Depen-
dent
Data to Status T17 4.5-15 Command Depen-
dent
Status to Command Complete MSG T18 4.5-5,8,15 0.98
μ
s
Command Complete MSG to Bus Free T19 4.5-5,8,15 0.51
μ
s
Data to Save Data Pointer MSG T20 4.5-14 4.00
μ
s
Save Data Pointer MSG to Disconnect MSG T21 4.5-14 0.79
μ
s
Command Byte Transfer T22 4.5-4 0.04
μ
s
Next Command Byte Access: 4.5-4
Next CDB Byte Access (Byte 2 of 6) T23.6.2 4.5-4 0.58
μ
s
Next CDB Byte Access (Byte 3 of 6) T23.6.3 4.5-4 0.12
μ
s
Next CDB Byte Access (Byte 4 of 6) T23.6.4 4.5-4 0.12
μ
s
Next CDB Byte Access (Byte 5 of 6) T23.6.5 4.5-4 0.12
μ
s
Next CDB Byte Access (Byte 6 of 6) T23.6.6 4.5-4 0.12
μ
s