Product Manual
Page 15
...differentiating features Model number ST19171N ST19171W ST19171WD ST19171WC ST19171DC I/O circuit type single-ended single-ended differential single-ended differential Number of I/O connector pins 50 68 68 80 80 Number of the targets (logical block addressing is sealed at the factory. C 5 3.0 General description Barracuda 9 drives combine magnetoresistive (MR) ...I/O data bus bits 8 (fast) 16 (fast/wide) 16 (fast/wide) 16 (fast/wide) 16 (fast/wide) The drive records and recovers data on each surface to the landing zone when power is for an exploded view of Seagate SCSI drives.
...differentiating features Model number ST19171N ST19171W ST19171WD ST19171WC ST19171DC I/O circuit type single-ended single-ended differential single-ended differential Number of I/O connector pins 50 68 68 80 80 Number of the targets (logical block addressing is sealed at the factory. C 5 3.0 General description Barracuda 9 drives combine magnetoresistive (MR) ...I/O data bus bits 8 (fast) 16 (fast/wide) 16 (fast/wide) 16 (fast/wide) 16 (fast/wide) The drive records and recovers data on each surface to the landing zone when power is for an exploded view of Seagate SCSI drives.
Product Manual
Page 31
... tolerance is enabled and the drive has not yet received a Start Motor command. [5] See Section 6.2.1 "Conducted Noise Immunity." A command is defined as a third-stroke seek at OD and Read One track. Table 2: DC power requirements Notes ST19171N/W/WC ST19171WD/DC Single-ended Differential Voltage ...and that its power-up , the motor current regulator limits the 12 volt current to an average value of Barracuda 9 drives. 6.1 None. See Section 9.9. AC power requirements 6.2 DC power requirements The voltage and current requirements for single-ended models includes the internal...
... tolerance is enabled and the drive has not yet received a Start Motor command. [5] See Section 6.2.1 "Conducted Noise Immunity." A command is defined as a third-stroke seek at OD and Read One track. Table 2: DC power requirements Notes ST19171N/W/WC ST19171WD/DC Single-ended Differential Voltage ...and that its power-up , the motor current regulator limits the 12 volt current to an average value of Barracuda 9 drives. 6.1 None. See Section 9.9. AC power requirements 6.2 DC power requirements The voltage and current requirements for single-ended models includes the internal...
Product Manual
Page 33
...ST19171WD/DC For drives with single-ended interface circuits, typical operating random read power dissipation is 13.6 watts (47 BTUs per hour) of DC power average at a local ambient temperature of DC power average at case temperatures above these temperature values (Section 8.3 and 8.3.1). Occasional excursions to achieve Barracuda...T3 0.0 2 4 6 8 TIME (S) 10 12 Figure 3. Typical Barracuda 9 drive +5 V and +12 V current profile 6.3 Power dissipation ST19171N/W/WC For drives with differential interface circuits, typical operating random read power dissipation is 82°...
...ST19171WD/DC For drives with single-ended interface circuits, typical operating random read power dissipation is 13.6 watts (47 BTUs per hour) of DC power average at a local ambient temperature of DC power average at case temperatures above these temperature values (Section 8.3 and 8.3.1). Occasional excursions to achieve Barracuda...T3 0.0 2 4 6 8 TIME (S) 10 12 Figure 3. Typical Barracuda 9 drive +5 V and +12 V current profile 6.3 Power dissipation ST19171N/W/WC For drives with differential interface circuits, typical operating random read power dissipation is 82°...
Product Manual
Page 35
Location of PCB components listed in Table 3 Barracuda 9 Product Manual, Rev. C ST19171N Drives 1 4 25 ST19171DC Drives 1 4 2 DYKX 3 ST19171WD Drives 1 4 2 XYJX 3 ST19171WC Drives 1 4 2 2 3 FYJX ST19171W Drives 1 4 3 HYJX 2 GYJX 3 2.00" HDA Temp. 1.00" Check Point Figure 4a.
Location of PCB components listed in Table 3 Barracuda 9 Product Manual, Rev. C ST19171N Drives 1 4 25 ST19171DC Drives 1 4 2 DYKX 3 ST19171WD Drives 1 4 2 XYJX 3 ST19171WC Drives 1 4 2 2 3 FYJX ST19171W Drives 1 4 3 HYJX 2 GYJX 3 2.00" HDA Temp. 1.00" Check Point Figure 4a.
Product Manual
Page 36
Location of PCB components listed in Table 3 26 ST19171N Drives 1 4 Barracuda 9 Product Manual, Rev. C ST19171DC Drives 1 4 2 ABAJ 3 ST19171WD Drives 1 4 2 EBAJ 3 ST19171WC Drives 1 4 2 2 3 CBAJ ST19171W Drives 1 4 3 DBAJ 2 BBAJ 3 2.00" HDA Temp. 1.00" Check Point Figure 4b.
Location of PCB components listed in Table 3 26 ST19171N Drives 1 4 Barracuda 9 Product Manual, Rev. C ST19171DC Drives 1 4 2 ABAJ 3 ST19171WD Drives 1 4 2 EBAJ 3 ST19171WC Drives 1 4 2 2 3 CBAJ ST19171W Drives 1 4 3 DBAJ 2 BBAJ 3 2.00" HDA Temp. 1.00" Check Point Figure 4b.
Product Manual
Page 47
...SCSI Parity Reserved Pin 1 J2 Pin 2 RT T T D MW P E P P ESEPDS2 1 [3] Pin 1 ST19171W Enable Terminator (default) Term. ST19171W/WD option select jumper connectors Power to SCSI Bus and Drive ST19171WD Term. Do not install jumpers on these pins. Power from SCSI Bus (position A) Term. Pin 1 J2 Jumper ...12 SCSI ID = 13 SCSI ID = 14 SCSI ID = 15 Figure 10. Barracuda 9 Product Manual, Rev. Power to SCSI Bus Term. Retain the cover unless you install a 20-pin plug. Power from Drive (default) Term. power to SCSI Bus (default) Host adapter or other device provides...
...SCSI Parity Reserved Pin 1 J2 Pin 2 RT T T D MW P E P P ESEPDS2 1 [3] Pin 1 ST19171W Enable Terminator (default) Term. ST19171W/WD option select jumper connectors Power to SCSI Bus and Drive ST19171WD Term. Do not install jumpers on these pins. Power from SCSI Bus (position A) Term. Pin 1 J2 Jumper ...12 SCSI ID = 13 SCSI ID = 14 SCSI ID = 15 Figure 10. Barracuda 9 Product Manual, Rev. Power to SCSI Bus Term. Retain the cover unless you install a 20-pin plug. Power from Drive (default) Term. power to SCSI Bus (default) Host adapter or other device provides...
Product Manual
Page 67
C 57 9.6.4 Mating connectors Part numbers for ST19171W and ST19171WD models Use a non-shielded 68-conductor cable... apart. Mating panel mount connector: 3M-CHE-2050-J01A10-KLE. 9.6.4.2 Mating connectors for connectors that mate with the various Barracuda 9 I /O connection using a cable is keyed (see Figure 18). 9.6.4.3 Mating connectors for daisy-chain installations. [1]...contacts with adjacent pins 50 mils apart. The drive device connector is keyed by means of 34 female pins with adjacent contacts 50 (1.27 mm) mils apart. Barracuda 9 Product Manual, Rev. The connector is ...
C 57 9.6.4 Mating connectors Part numbers for ST19171W and ST19171WD models Use a non-shielded 68-conductor cable... apart. Mating panel mount connector: 3M-CHE-2050-J01A10-KLE. 9.6.4.2 Mating connectors for connectors that mate with the various Barracuda 9 I /O connection using a cable is keyed (see Figure 18). 9.6.4.3 Mating connectors for daisy-chain installations. [1]...contacts with adjacent pins 50 mils apart. The drive device connector is keyed by means of 34 female pins with adjacent contacts 50 (1.27 mm) mils apart. Barracuda 9 Product Manual, Rev. The connector is ...
Product Manual
Page 75
The minus sign next to the signal indicates asserted state is the low voltage of the two levels used for ST19171WD drives Note. Signal Name [1] +DB12 +DB13 +DB14 +DB15 +DBP1 GND +DB0 +DB1 +DB2 +DB3 +DB4 +DB5 +DB6 +DB7 +DBP DIFFSENS TermPwr TermPwr Reserved +ATN GND +BSY +... -C/D -REQ -I/O GND -DB8 -DB9 -DB10 -DB11 Notes [ ]: See page following Table 17. C 65 Table 15: Wide differential P cable assignments (non-shielded connector) for logic signals. Barracuda 9 Product Manual, Rev.
The minus sign next to the signal indicates asserted state is the low voltage of the two levels used for ST19171WD drives Note. Signal Name [1] +DB12 +DB13 +DB14 +DB15 +DBP1 GND +DB0 +DB1 +DB2 +DB3 +DB4 +DB5 +DB6 +DB7 +DBP DIFFSENS TermPwr TermPwr Reserved +ATN GND +BSY +... -C/D -REQ -I/O GND -DB8 -DB9 -DB10 -DB11 Notes [ ]: See page following Table 17. C 65 Table 15: Wide differential P cable assignments (non-shielded connector) for logic signals. Barracuda 9 Product Manual, Rev.
Product Manual
Page 79
... Vil (low-level input voltage) = 1.0 V maximum (signal true); maximum = Vdd +0.5V. C 69 9.7 Electrical description ST19171N and ST19171W models use open collector or three state drivers. Differential I /O circuits are open collector single-ended driver. This means some method of active ...Interface signal levels and logical sense at each end of 0.4 volt. Barracuda 9 Product Manual, Rev. ST19171WD models use an ANSI SCSI single-ended receiver with 110-ohm active termination circuits at the drive I/O connector for adding terminator sockets on the back panel must be provided...
... Vil (low-level input voltage) = 1.0 V maximum (signal true); maximum = Vdd +0.5V. C 69 9.7 Electrical description ST19171N and ST19171W models use open collector or three state drivers. Differential I /O circuits are open collector single-ended driver. This means some method of active ...Interface signal levels and logical sense at each end of 0.4 volt. Barracuda 9 Product Manual, Rev. ST19171WD models use an ANSI SCSI single-ended receiver with 110-ohm active termination circuits at the drive I/O connector for adding terminator sockets on the back panel must be provided...
Product Manual
Page 80
... requirement is more positive than +SIGNAL. Input characteristics Each signal received by ST19171WD drives are shown in Figure 21. All assigned signals must additionally conform to EIA RS-485-1983. 70 Barracuda 9 Product Manual, Rev. The drive has no provisions for the differential drives. You must additionally conform to +12 V DC *Measure these voltages between...
... requirement is more positive than +SIGNAL. Input characteristics Each signal received by ST19171WD drives are shown in Figure 21. All assigned signals must additionally conform to EIA RS-485-1983. 70 Barracuda 9 Product Manual, Rev. The drive has no provisions for the differential drives. You must additionally conform to +12 V DC *Measure these voltages between...
Product Manual
Page 82
... you to 5.25 V 1,500 mA minimum source drive capability 3.0 A maximum ST19171WD drives You can configure terminator power in four different ways. Drive supplies power to the SCSI bus terminator power line. C 9.8 Terminator requirements ST19171N and ST19171W drives Internal disc drive I/O termination consists of active circuits contained in the 80-pin I /O Barracuda drives do not have internal terminators available. Note...
... you to 5.25 V 1,500 mA minimum source drive capability 3.0 A maximum ST19171WD drives You can configure terminator power in four different ways. Drive supplies power to the SCSI bus terminator power line. C 9.8 Terminator requirements ST19171N and ST19171W drives Internal disc drive I/O termination consists of active circuits contained in the 80-pin I /O Barracuda drives do not have internal terminators available. Note...