9.10, Disc drive SCSI timing | Seagate ST336918N, ST318418N, ST318438LW

Barracuda 36ES2 Product Manual, Rev. B

9.10	Disc drive SCSI timing
Table 17:	Disc drive SCSI timing

		Waveform	Waveform
Description		symbol [1]	table [1]	Typical timing


Target Select Time (no Arbitration)		T00	N/A	<1 ∝s

Target Select Time (with Arbitration)		T01	4.5-1,2	1.93	∝s

Target Select to Command		T02	4.5-1	3.77	∝s

Target Select to MSG Out		T03	4.5-2	1.57	∝s

Identify MSG to Command		T04	4.5-3	3.36	∝s

Command to Status		T05	4.5-5	Command Dependent

Command to Data (para. In)		T06	4.5-9	Command Dependent

Command to Data (para. Out)		T07	4.5-10	Command Dependent

Command to Data (Write to Data Buffer)		T08	4.5-10	Command Dependent

Command to Disconnect MSG		T09	4.5-6	Command Dependent

Disconnect MSG to Bus Free		T10	4.5-6,14	0.52	∝s

Disconnect to Arbitration (for Reselect)		T11	4.5-6	Command Dependent
This measures disconnected CMD overhead

Target win Arbitration (for Reselect)		T12	4.5-7	3.00	∝s

Arbitration to Reselect		T13	4.5-7	1.60	∝s

Reselect to Identify MSG In		T14	4.5-7	1.39	∝s

Reselect Identify MSG to Status		T15	4.5-8	Command Dependent

Reselect Identify MSG to Data (media)		T16	4.5-11	Command Dependent

Data to Status		T17	4.5-15	Command Dependent

Status to Command Complete MSG		T18	4.5-5,8,15	0.98	∝s

Command Complete MSG to Bus Free		T19	4.5-5,8,15	0.51	∝s

Data to Save Data Pointer MSG		T20	4.5-14	4.00	∝s

Save Data Pointer MSG to Disconnect MSG		T21	4.5-14	0.79	∝s

Command Byte Transfer		T22	4.5-4	0.04	∝s

Next Command Byte Access:			4.5-4

Next CDB Byte Access (Byte 2 of 6)		T23.6.2	4.5-4	0.58	∝s

Next CDB Byte Access (Byte 3 of 6)		T23.6.3	4.5-4	0.12	∝s

Next CDB Byte Access (Byte 4 of 6)		T23.6.4	4.5-4	0.12	∝s

Next CDB Byte Access (Byte 5 of 6)		T23.6.5	4.5-4	0.12	∝s

Next CDB Byte Access (Byte 6 of 6)		T23.6.6	4.5-4	0.12	∝s

Next CDB Byte Access (Byte 2 of 10)		T23.10.2	4.5-4	0.59	∝s

Next CDB Byte Access (Byte 3 of 10)		T23.10.3	4.5-4	0.11	∝s ±1 ∝s

Next CDB Byte Access (Byte 4 of 10)		T23.10.4	4.5-4	0.12	∝s ±1 ∝s

Next CDB Byte Access (Byte 5 of 10)		T23.10.5	4.5-4	0.11	∝s ±1 ∝s

Next CDB Byte Access (Byte 6 of 10)		T23.10.6	4.5-4	0.11	∝s ±1 ∝s

Next CDB Byte Access (Byte 7 of 10)		T23.10.7	4.5-4	0.13	∝s ±1 ∝s

Next CDB Byte Access (Byte 8 of 10)		T23.10.8	4.5-4	0.12	∝s ±1 ∝s

Next CDB Byte Access (Byte 9 of 10)		T23.10.9	4.5-4	0.12	∝s ±1 ∝s

Next CDB Byte Access (Byte 10 of 10)		T23.10.10	4.5-4	0.12	∝s ±1 ∝s

Seagate ST336918N, ST318418N 9.10, Disc drive SCSI timing, Barracuda 36ES2 Product Manual, Rev. B

Models: ST318438LW ST336938LW ST336918N ST318418N

9.10

Disc drive SCSI timing