Product Manual
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© 1996 Seagate Technology, Inc. Other product names are registered trademarks of their owners. D February 1996 Seagate® , Seagate Technology® , and the Seagate logo are registered trademarks or trademarks of Seagate Technology, Inc. Barracuda™ is a trademark of this publication may be reproduced in any form without notice, product offerings or specifications. No part of Seagate Technology, Inc. Seagate reserves the right to change, without written permission from Seagate Technology, Inc. All rights reserved Publication number: 83328880, Rev.
© 1996 Seagate Technology, Inc. Other product names are registered trademarks of their owners. D February 1996 Seagate® , Seagate Technology® , and the Seagate logo are registered trademarks or trademarks of Seagate Technology, Inc. Barracuda™ is a trademark of this publication may be reproduced in any form without notice, product offerings or specifications. No part of Seagate Technology, Inc. Seagate reserves the right to change, without written permission from Seagate Technology, Inc. All rights reserved Publication number: 83328880, Rev.
Product Manual
Page 7
... 6.2.1 Mean time between failures (MTBF 22 6.2.2 Air flow ...22 6.2.3 Preventive maintenance 30 6.2.4 Service life ...30 6.2.5 Service philosophy 30 6.2.6 Installation ...30 6.2.7 Service tools 30 6.2.8 Hot plugging Barracuda 4 disc drives 31 7.0 Physical/electrical specifications 33 7.1 AC power requirements 33 7.2 DC power requirements 33 7.2.1 Conducted noise immunity 34 7.2.2 Power sequencing 34 7.2.3 12V current profile 35
... 6.2.1 Mean time between failures (MTBF 22 6.2.2 Air flow ...22 6.2.3 Preventive maintenance 30 6.2.4 Service life ...30 6.2.5 Service philosophy 30 6.2.6 Installation ...30 6.2.7 Service tools 30 6.2.8 Hot plugging Barracuda 4 disc drives 31 7.0 Physical/electrical specifications 33 7.1 AC power requirements 33 7.2 DC power requirements 33 7.2.1 Conducted noise immunity 34 7.2.2 Power sequencing 34 7.2.3 12V current profile 35
Product Manual
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... 7.5 Electromagnetic compatibility 38 7.6 Mechanical specifications 39 7.6.1 Drive orientation 42 7.6.2 Cooling ...42 8.0 Media characteristics ...43 8.1 Media description ...43 9.0 Defect and error management 45 9.1 Drive internal defects/errors 45 10.0 Drive configuration ...47 10.1 Option headers ...47 10.1.1 ST15150N/ND drives option headers 47 10.1.2 ST15150W/WD drives option headers 50 10.1.3 ST15150WC/DC drives option headers 53 10.2 Synchronized...
... 7.5 Electromagnetic compatibility 38 7.6 Mechanical specifications 39 7.6.1 Drive orientation 42 7.6.2 Cooling ...42 8.0 Media characteristics ...43 8.1 Media description ...43 9.0 Defect and error management 45 9.1 Drive internal defects/errors 45 10.0 Drive configuration ...47 10.1 Option headers ...47 10.1.1 ST15150N/ND drives option headers 47 10.1.2 ST15150W/WD drives option headers 50 10.1.3 ST15150WC/DC drives option headers 53 10.2 Synchronized...
Product Manual
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... 75 Figure 34. Synchronized drive interconnect diagram 17 Figure 5. MYHX temperature measurement locations 26 Figure 10. ST15150N/ND drives configuration select header specification 56 Figure 27. ST15150W/WD drives configuration select header specification 56 Figure 28. Single-...Typical Barracuda 4 drive +12V current profile 35 Figure 15. ST15150N/ND drives option header locations 47 Figure 20. SCA SCSI device connector 81 Mounting configuration dimensions for W/WD drives 40 Figure 17. Barracuda 4 disc drive 1 Figure 2. Air flow ...23 Figure 7. Barracuda disc drive ...
... 75 Figure 34. Synchronized drive interconnect diagram 17 Figure 5. MYHX temperature measurement locations 26 Figure 10. ST15150N/ND drives configuration select header specification 56 Figure 27. ST15150W/WD drives configuration select header specification 56 Figure 28. Single-...Typical Barracuda 4 drive +12V current profile 35 Figure 15. ST15150N/ND drives option header locations 47 Figure 20. SCA SCSI device connector 81 Mounting configuration dimensions for W/WD drives 40 Figure 17. Barracuda 4 disc drive 1 Figure 2. Air flow ...23 Figure 7. Barracuda disc drive ...
Product Manual
Page 11
... the Small Computer System Interface-2 (SCSI-2) as described in the ANSI SCSI and SCSI-2 interface specifications to the extent described in this and other families of Seagate drives. Barracuda™ 4 disc drives. This manual defines the performance characteristics of this manual. ST15150N/ND/W/WD/WC/DC Product Manual, Rev. The SCSI-2 Interface Product Manual (part number...
... the Small Computer System Interface-2 (SCSI-2) as described in the ANSI SCSI and SCSI-2 interface specifications to the extent described in this and other families of Seagate drives. Barracuda™ 4 disc drives. This manual defines the performance characteristics of this manual. ST15150N/ND/W/WD/WC/DC Product Manual, Rev. The SCSI-2 Interface Product Manual (part number...
Product Manual
Page 21
D 11 5.0 Performance characteristics This section provides performance-related characteristics and features of Barracuda 4 drives. 5.1 Internal drive characteristics Drive capacity, Mbytes unformatted 5,062 Read/write data heads, maximum (physical) 21 Bytes per track, average bytes... an active SCSI command. When execution of initialization. ST15150N/ND/W/WD/WC/DC Product Manual, Rev. When calibration completes for the remaining head. The above procedure continues until the calibration for the specific head being calibrated, the first queued SCSI command executes...
D 11 5.0 Performance characteristics This section provides performance-related characteristics and features of Barracuda 4 drives. 5.1 Internal drive characteristics Drive capacity, Mbytes unformatted 5,062 Read/write data heads, maximum (physical) 21 Bytes per track, average bytes... an active SCSI command. When execution of initialization. ST15150N/ND/W/WD/WC/DC Product Manual, Rev. When calibration completes for the remaining head. The above procedure continues until the calibration for the specific head being calibrated, the first queued SCSI command executes...
Product Manual
Page 26
...see the SCSI-2 Interface Product Manual). 2. Case B. The drive prefetches additional logical blocks contiguous to the initiator in accordance with the "buffer-full" ratio specification given in the segment. During a prefetch, the drive crosses a cylinder boundary to fetch data only if the ... The drive stops filling the segment when the maximum prefetch value has been transferred (see the SCSI-2 Interface Product Manual). Divide the 976,896 bytes in Mode Select Disconnect/ Reconnect parameters, page 02h (see the SCSI-2 Interface Product Manual). 3. 16 ST15150N/ND/W/WD...
...see the SCSI-2 Interface Product Manual). 2. Case B. The drive prefetches additional logical blocks contiguous to the initiator in accordance with the "buffer-full" ratio specification given in the segment. During a prefetch, the drive crosses a cylinder boundary to fetch data only if the ... The drive stops filling the segment when the maximum prefetch value has been transferred (see the SCSI-2 Interface Product Manual). Divide the 976,896 bytes in Mode Select Disconnect/ Reconnect parameters, page 02h (see the SCSI-2 Interface Product Manual). 3. 16 ST15150N/ND/W/WD...
Product Manual
Page 31
ST15150N/ND/W/WD/WC/DC Product Manual, Rev. Refer to Section 9.0, "Defect and error management." 6.1.1 Environmental interference When evaluating systems operation under conditions of electromagnetic interference (EMI), the performance of being recovered by normal drive or system recovery procedures without ...8226; is not capable of being detected from error rate computations. D 21 6.0 Reliability specifications The following : • The drive is considered acceptable if the drive does not generate an unrecoverable condition. Seek error rate Less than 10 errors in 108...
ST15150N/ND/W/WD/WC/DC Product Manual, Rev. Refer to Section 9.0, "Defect and error management." 6.1.1 Environmental interference When evaluating systems operation under conditions of electromagnetic interference (EMI), the performance of being recovered by normal drive or system recovery procedures without ...8226; is not capable of being detected from error rate computations. D 21 6.0 Reliability specifications The following : • The drive is considered acceptable if the drive does not generate an unrecoverable condition. Seek error rate Less than 10 errors in 108...
Product Manual
Page 32
... flow The rack, cabinet, or drawer environment for a minimum period of the drive. Orient the drive or direct the air flow so that the least amount of Barracuda 4 disc drives by the Barracuda 4 drive and other information that may be no seek complete error (02h), or track ...1h). Possible air-flow patterns are classified as shown in the sense key. Drive failure means any stoppage or substandard performance caused by using the temperature measurement guidelines described below. 22 6.1.3 6.2 6.2.1 6.2.2 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. Create the air-flow patterns ...
... flow The rack, cabinet, or drawer environment for a minimum period of the drive. Orient the drive or direct the air flow so that the least amount of Barracuda 4 disc drives by the Barracuda 4 drive and other information that may be no seek complete error (02h), or track ...1h). Possible air-flow patterns are classified as shown in the sense key. Drive failure means any stoppage or substandard performance caused by using the temperature measurement guidelines described below. 22 6.1.3 6.2 6.2.1 6.2.2 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. Create the air-flow patterns ...
Product Manual
Page 43
...values. [2] A -10% tolerance is permissible during initial start of Barracuda 4 drives. 7.1 AC power requirements None. 7.2 DC power requirements The voltage and current requirements for ST15150N/ND/W/WD/WC/DC drives Voltage regulation [5] Notes N/W/WC ±5V[11] ±12V ...) AC 3σ [1] 0.95 0.95 1.19 0.95 1.08 1.8 1.95 1.8 Track following at the drive's power connector. ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 33 7.0 Physical/electrical specifications This section provides information relating to accept selection by the host initiator. [3] See Figure 14.
...values. [2] A -10% tolerance is permissible during initial start of Barracuda 4 drives. 7.1 AC power requirements None. 7.2 DC power requirements The voltage and current requirements for ST15150N/ND/W/WD/WC/DC drives Voltage regulation [5] Notes N/W/WC ±5V[11] ±12V ...) AC 3σ [1] 0.95 0.95 1.19 0.95 1.08 1.8 1.95 1.8 Track following at the drive's power connector. ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 33 7.0 Physical/electrical specifications This section provides information relating to accept selection by the host initiator. [3] See Figure 14.
Product Manual
Page 46
...package ambient with a maximum gradient of 122°F (50°C) may degrade MTBF. The enclosure for your drive are referenced to a standard day at nominal voltages ST15150N/W/WC ST15150ND/WD/DC 15W (51 BTUs/hr) 16W (54 BTUs/hr) Typical power dissipation under idle ... the shipping container designed by Seagate. This assumes that the drive is 82°F (28°C). Operating 5% to 50°C) drive ambient temperature range with a maximum gradient of DC power average at 58.7°F (14.8°C). Altitude and atmospheric pressure specifications are listed below assume that...
...package ambient with a maximum gradient of 122°F (50°C) may degrade MTBF. The enclosure for your drive are referenced to a standard day at nominal voltages ST15150N/W/WC ST15150ND/WD/DC 15W (51 BTUs/hr) 16W (54 BTUs/hr) Typical power dissipation under idle ... the shipping container designed by Seagate. This assumes that the drive is 82°F (28°C). Operating 5% to 50°C) drive ambient temperature range with a maximum gradient of DC power average at 58.7°F (14.8°C). Altitude and atmospheric pressure specifications are listed below assume that...
Product Manual
Page 47
...limits are specified with specifications not exceeding: 20...an enclosure that buffers and restricts the drive's movements to +3,048 meters) b. ... shown in an abnormal environment The drive as installed for distance dropped Drop...drive as packaged by Seagate for normal operation operates error free while subjected to a single or multiple drive pack. This includes both isolated drives and integrated drives. c. Shock may be applied in the X, Y, or Z axis. Packaged The drive...drive mounted in the X, Y, or Z axis. The drive does not cause drive...directly on the drive chassis. Do...
...limits are specified with specifications not exceeding: 20...an enclosure that buffers and restricts the drive's movements to +3,048 meters) b. ... shown in an abnormal environment The drive as installed for distance dropped Drop...drive as packaged by Seagate for normal operation operates error free while subjected to a single or multiple drive pack. This includes both isolated drives and integrated drives. c. Shock may be applied in the X, Y, or Z axis. Packaged The drive...drive mounted in the X, Y, or Z axis. The drive does not cause drive...directly on the drive chassis. Do...
Product Manual
Page 48
...@ 0.75 G Vibration occurring at these levels may be applied in a normal environment The drive as installed for normal operation does not incur physical damage while subjected to ISO 7779 specifications. See Section 7.2 "DC power requirements." Operating in the X, Y, or Z axis. ...may be applied in the X, Y or Z axis. 38 7.4.4.2 7.4.5 7.4.6 7.5 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. Acoustics Sound power during the abnormal vibration period. Air cleanliness The drive is responsible for normal operation operates error free while subjected to operate in the same system...
...@ 0.75 G Vibration occurring at these levels may be applied in a normal environment The drive as installed for normal operation does not incur physical damage while subjected to ISO 7779 specifications. See Section 7.2 "DC power requirements." Operating in the X, Y, or Z axis. ...may be applied in the X, Y or Z axis. 38 7.4.4.2 7.4.5 7.4.6 7.5 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. Acoustics Sound power during the abnormal vibration period. Air cleanliness The drive is responsible for normal operation operates error free while subjected to operate in the same system...
Product Manual
Page 49
...177; .25 T .190 ± 0.010 4.83 ± .25 U 0.015 max 0.381 max Figure 15. D 39 7.6 Mechanical specifications The following nominal dimensions do not include the decorative front-panel accessory. A minimum clearance of 0.050 inches must be maintained from the PWA side... Notes: [1] Mounting holes two on bottom, 6-32 UNC. B [2] Mounting holes four on each side, 6-32 UNC. ST15150N/ND/W/WD/WC/DC Product Manual, Rev. Mounting configuration dimensions for ST15150W/WD drives. Height Width Depth Weight 1.63 in 4.00 in 5.97 in . (3.81 mm). Max screw length into side of...
...177; .25 T .190 ± 0.010 4.83 ± .25 U 0.015 max 0.381 max Figure 15. D 39 7.6 Mechanical specifications The following nominal dimensions do not include the decorative front-panel accessory. A minimum clearance of 0.050 inches must be maintained from the PWA side... Notes: [1] Mounting holes two on bottom, 6-32 UNC. B [2] Mounting holes four on each side, 6-32 UNC. ST15150N/ND/W/WD/WC/DC Product Manual, Rev. Mounting configuration dimensions for ST15150W/WD drives. Height Width Depth Weight 1.63 in 4.00 in 5.97 in . (3.81 mm). Max screw length into side of...
Product Manual
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... meet specific functionality requirements. 10.1.1 ST15150N/ND drives option headers SCSI I/O Connector Pin 1 J4 J01 DC Power Connector Figure 19. ST15150N/ND drives option header locations ST15150N and ST15150W models can also synchronize the spindles of the drives for synchronizing spindles. 10.1 Option headers The headers described in this section enable you to configure the drive to configure Barracuda 4 drives...
... meet specific functionality requirements. 10.1.1 ST15150N/ND drives option headers SCSI I/O Connector Pin 1 J4 J01 DC Power Connector Figure 19. ST15150N/ND drives option header locations ST15150N and ST15150W models can also synchronize the spindles of the drives for synchronizing spindles. 10.1 Option headers The headers described in this section enable you to configure the drive to configure Barracuda 4 drives...
Product Manual
Page 65
.... The reference index signal is an input otherwise. ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 55 10.2 Synchronized spindles interface The synchronized spindles interface (SSI) allows several drives operating from drive to drive in a daisy-chain fashion as a master and...driver circuits have the following electrical specifications: Negated (false) 0.V to +0.4V @ I = +250 µA Main PWA Open Collector Driver Receiver 2.21K Ohm +5V SSREF + GND J4 - 1 (N/ND Drives) J5 - 11 (W/WD Drives) J4 - 2 (N/ND Drives) J5 - 12 (W/WD Drives) ST15150WC/DC drives use J04 pin 6 for ...
.... The reference index signal is an input otherwise. ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 55 10.2 Synchronized spindles interface The synchronized spindles interface (SSI) allows several drives operating from drive to drive in a daisy-chain fashion as a master and...driver circuits have the following electrical specifications: Negated (false) 0.V to +0.4V @ I = +250 µA Main PWA Open Collector Driver Receiver 2.21K Ohm +5V SSREF + GND J4 - 1 (N/ND Drives) J5 - 11 (W/WD Drives) J4 - 2 (N/ND Drives) J5 - 12 (W/WD Drives) ST15150WC/DC drives use J04 pin 6 for ...
Product Manual
Page 66
...mm header type connector. A diode prevents current from backfeeding. ST15150N/ND drives configuration select header specification Dimensions of the J5 connector mounted on the main PCB ofST15150W/WD drives to interconnect the drives are used for connecting the reference index signal cable, as...185 (4.7 mm) Figure 27. Physical interface Dimensions of ST15150N/ND drives to interconnect the drives are used for connecting the reference index signal cable, as shown in Figure 22. ST15150W/WD drives configuration select header specification Pin 11 is SSREF+ and pin 12 is a...
...mm header type connector. A diode prevents current from backfeeding. ST15150N/ND drives configuration select header specification Dimensions of the J5 connector mounted on the main PCB ofST15150W/WD drives to interconnect the drives are used for connecting the reference index signal cable, as...185 (4.7 mm) Figure 27. Physical interface Dimensions of ST15150N/ND drives to interconnect the drives are used for connecting the reference index signal cable, as shown in Figure 22. ST15150W/WD drives configuration select header specification Pin 11 is SSREF+ and pin 12 is a...
Product Manual
Page 80
...effects. Only non-shielded cable connectors are applicable for non-shielded flat or twisted-pair ribbon cable. Connector requirements ST15150N/ND drives The non-shielded cable connector is especially important to achieve satisfactory system operation. The connector is recommended for N and ND...6050 with strain relief, no center key Berg-66900-290 with strain relief, with center key Open end (in the same bus. Your specific setup may be carefully considered. However, most available cables have a somewhat lower characteristic impedance. A 50-conductor flat cable or 25 twisted-...
...effects. Only non-shielded cable connectors are applicable for non-shielded flat or twisted-pair ribbon cable. Connector requirements ST15150N/ND drives The non-shielded cable connector is especially important to achieve satisfactory system operation. The connector is recommended for N and ND...6050 with strain relief, no center key Berg-66900-290 with strain relief, with center key Open end (in the same bus. Your specific setup may be carefully considered. However, most available cables have a somewhat lower characteristic impedance. A 50-conductor flat cable or 25 twisted-...
Product Manual
Page 98
... of the 28, 29, 30 head switch overhead time 14 heat/power dissipation 36 hot plugging Barracuda disc drives 31 humidity 36 I I/O circuits 69 index signal 18 inquiry data 62 installation 30 instructions 9... L landing zone 6 LYHX temperature measuring 25 M mean time between failures (MTBF) 22 mechanical specifications 39 media characteristics 43 media description 43 miscellaneous operating features supported 66 miscorrected data transferred 21 Mode Select...14 operating current ST15150N/ND 33 option/configuration headers 47 options drive temination 57 single-unit shipping pack 8 overhead time 14
... of the 28, 29, 30 head switch overhead time 14 heat/power dissipation 36 hot plugging Barracuda disc drives 31 humidity 36 I I/O circuits 69 index signal 18 inquiry data 62 installation 30 instructions 9... L landing zone 6 LYHX temperature measuring 25 M mean time between failures (MTBF) 22 mechanical specifications 39 media characteristics 43 media description 43 miscellaneous operating features supported 66 miscorrected data transferred 21 Mode Select...14 operating current ST15150N/ND 33 option/configuration headers 47 options drive temination 57 single-unit shipping pack 8 overhead time 14
Product Manual
Page 99
...documents Barracuda 4 Installation Guide 3 SCSI-2 Reference Manual 3 reference index signal 55 termination 56 reference signal 18, 19 relative humidity 36 reliability general characteristics 7, 8 reliability and service 22 reliability specifications 21... remote LED connector 49, 52 REQ/ACK offset 67 rotation speed 11 rotational latency average 11 rotational position locking 18 rotational skew operating the drive with 19 S safety agencies certification 3 safety/regulatory agency compliance 3 SCA contact assignments 83 SCSI documents, ANSI 3 SCSI bus conditions and misc. ST15150N...
...documents Barracuda 4 Installation Guide 3 SCSI-2 Reference Manual 3 reference index signal 55 termination 56 reference signal 18, 19 relative humidity 36 reliability general characteristics 7, 8 reliability and service 22 reliability specifications 21... remote LED connector 49, 52 REQ/ACK offset 67 rotation speed 11 rotational latency average 11 rotational position locking 18 rotational skew operating the drive with 19 S safety agencies certification 3 safety/regulatory agency compliance 3 SCA contact assignments 83 SCSI documents, ANSI 3 SCSI bus conditions and misc. ST15150N...