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HAWK 2 Family:

Product Manual, Volume 1

ST12400W/WD/WC

(Wide bus)

Summary of content (82 pages)

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............................................................. HAWK 2 Family: ............................................................. (Wide bus) ............................................................. ST12400W/WD/WC ............................................................. ............................................................. Product Manual, Volume 1 .............................................................
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........................................................... HAWK 2 Family: ........................................................... (Wide bus) ........................................................... ST12400W/WD/WC ........................................................... ........................................................... Product Manual, Volume 1 ...........................................................
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 1995 Seagate Technology, Inc. All rights reserved Publication Number: 77767457, Rev. C March 1995 Seagate, Seagate Technology and the Seagate logo are registered trademarks of Seagate Technology, Inc. Hawk™, SeaFAX, SeaFone, SeaTDD and SeaBOARD are trademarks of Seagate Technology, Inc. Other product names are registered trademarks or trademarks of their owners. Seagate reserves the right to change, without notice, product offerings or specifications.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. C v _____________________________________________________________________________________ Revision status summary sheet Revision Authority A Issue Date Writer/Eng. Sheets Affected 8/5/94 D. Ashby v through viii, 1 through 71 B PLD:84538 01/18/95 D. Ashby v, viii, 21, 23, 69 and 71 C PLD:84542 03/17/95 J. Rust/J. Bentley v, 24, 25, 70, 71. Notice.
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vi Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ Table of contents 1.0 Scope .......................................................................................................................................... 1 2.0 Applicable standards and reference documentation .............................................................. 2 2.1 Standards ...................................................
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A vii _____________________________________________________________________________________ Table of contents 6.2 Reliability and service ..................................................................................................... 19 6.2.1 Mean time between failure ................................................................................. 19 6.2.2 Preventive maintenance ........................................................
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viii Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. B _____________________________________________________________________________________ Table of contents 11.0 Interface requirement ................................................................................................................ 41 11.1 General description ......................................................................................................... 41 11.2 SCSI interface messages supported ..................
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 1 _____________________________________________________________________________________ 1.0 Scope This specification describes the Seagate Technology, Inc. Hawk 2 family Model ST12400 Wide SCSI bus Disc Drive. This high capacity, high performance member of the Seagate 3.5 inch rigid disc family has a new HDA (Head/Disc Assembly) design having improvements over previous 3.5-inch Seagate models. It has an embedded SCSI controller.
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2 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 2.0 Applicable standards and reference documentation The drive has been developed as a system peripheral to the highest standards of design and construction. The drive depends upon its host equipment to provide adequate power and environment in order to achieve optimum performance and compliance with applicable industry and governmental regulations.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 3 ______________________________________________________________________________________ 3.0 General description The drives are a member of a family of low cost, high performance, highly reliable, random access storage devices designed to meet the needs of the OEM marketplace. The drive records and recovers data on 3.7 inch (95 mm) fixed discs.
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4 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A ______________________________________________________________________________________ ST12400W/WD PCB Figure 3.0-1.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 5 _____________________________________________________________________________________ 4.
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6 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 4.2 Unformatted and formatted capacities Formatted capacity depends on the number of spare reallocation sectors reserved and the number of bytes per sector. The following table shows some typical formatted capacities. Spare Sectors or Cylinders Reserved for reallocation No Spares 12 Spare Sectors per cyl.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 7 _____________________________________________________________________________________ 4.5 Installation For option jumper locations and definitions refer to Figure 10.1-1a and 10.1-1b. Drive default mode parameters are not normally needed for installation. Refer to Section 11.3.2 for default mode parameters if they are needed. • Ensure that the SCSI ID of the drive is not the same as the host adapter.
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8 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 5.0 Performance characteristics 5.1 Internal drive characteristics (transparent to user) Drive Capacity Read/Write Heads Bytes/Track Bytes/Surface Tracks/Surface, Total Tracks/Inch Servo Heads Internal Data Rate Disc Rotational Speed Average Rotational Latency 5.2 ST12400W/WD/WC 2537 MByte (UNF) 19 Data (Max) 50,945 Bytes (Avg) 131.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 9 _____________________________________________________________________________________ 5.2.2 Format drive command execution time (minutes) [1] Maximum (with verify) Maximum (no verify) ST12400W/WD/WC 45 Min. 31 Min. *[ ] All notes are listed in Section 5.3.1. 5.2.3 Read data command execution time [4] (512 byte sector size, without disconnect and with read look ahead cache disabled) latency time is included. a.
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10 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 5.3 Generalized performance characteristics Minimum Sector Interleave 1 to 1 Data Buffer To/From Disc Media Data transfer rate (< 1 sector) - 512 Byte Sector Min. [4]* Avg. [4] Max. [4] 3.35 MByte/sec 4.59 MByte/sec 5.35 MByte/sec Data Buffer To/From Disc Media Data Transfer Rate (< 1 Track) - 512 Byte Sector Min. [4] Avg. [4] Max. [4] 2.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 11 _____________________________________________________________________________________ 5.3.1 Notes for sections 5.2 and 5.3. [1] Execution time measured from receipt of the last Byte of the Command Descriptor Block (CDB) to the request for a Status Byte Transfer to the Initiator (excluding connect/disconnect). [2] Maximum times are specified over the worst case conditions of temperature, voltage margins and drive orientation.
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12 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ If the Motor Start Option is enabled the internal controller accepts the commands listed in the SCSI Interface Product Manual* less than 3 seconds after DC power has been applied. After the Motor Start Command has been received the drive becomes ready for normal operations within 15 seconds.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 13 _____________________________________________________________________________________ Case B - A Read command requests data, the first LB of which is not in any segment of the cache: 1. The drive fetches the requested LB’s from the disc and transfers them into a segment, and from there to the host in accordance with the disconnect/reconnect specification referred to in case A. 2. If the prefetch feature is enabled, refer to section 5.5.
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14 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 5.6 Caching write data Write caching is a write operation by the drive that makes use of a drive buffer storage area where the data to be written to the medium is stored in one or more segments while the drive performs the write command. Write caching is enabled along with read caching.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev.
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16 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ The servo/read-write LSI on the master drive provides the reference signal (REFIND+). It is a 90.18 Hz crystal generated signal. The signal is normally false/negated (nominal 0 V) and makes a transition to the true/asserted (nominal +5 V) level to indicate the reference position during the revolution period.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 17 _____________________________________________________________________________________ SCSI Interface Factors The Rotational Position Locking (RPL) field in byte 17 (bits 0 and 1) of the Rigid Disc Drive Geometry mode parameters page (page 04h) is used for enabling/disabling spindle synchronization mode*. If the target fails to achieve synchronization, it shall create a unit attention to all initiators.
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18 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 6.0 Reliability specifications The following reliability specifications assume correct host/drive operational interface, including all interface timings, power supply voltages, and environmental requirements.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 19 _____________________________________________________________________________________ 6.1.3 Write errors Write errors can occur as a result of media defects, environmental interference, or equipment malfunction. Therefore, write errors are not predictable as a function of the number of bits passed.
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20 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 6.2.4 Service philosophy Special equipment is required to repair the drive HDA. In order to achieve the above service life, repairs must be performed only at a properly equipped and staffed service and repair facility.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. B 21 _____________________________________________________________________________________ 7.0 Physical/electrical specifications 7.1 AC power requirements: None 7.2 DC Power requirements The voltage and current requirements for a single drive are shown in the following table. Values indicated apply at the drive power connector. Table 7.2-1.
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22 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 7.2.1 Conducted noise immunity Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 mHz. Maximum allowed noise values given below are peak to peak measurements and apply at the drive power connector. +5 V = +12 V = 150 mV pp from 0 to 100 kHz and 45 mA pp from 100 kHz to 10 mHz.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. B 23 _____________________________________________________________________________________ Note. All times and currents are typical. See Table 7.2-1 for maximum current requirements. 1.0 5V Current .5 CH1 GND T3 T1 T4 T2 T6 T5 2.0 1.5 12V Current 1 .5 CH2 GND Channel 1 2 s .5 Amps T Channel 2 2 s .5 Amps 0 2 4 6 8 10 12 14 16 18 Seconds Figure 7.2.2-1.
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24 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. C _____________________________________________________________________________________ 7.4.1 Temperature a. Operating The drive meets all specifications over a 41°F to 122°F (5°C to 50°C) drive ambient temperature range with a maximum gradient of 36°F (20°C) per hour. The enclosure for the drive should be designed such that the temperatures at the locations specified in Table 7.4.1-1, column 1 are not exceeded.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. C 25 _____________________________________________________________________________________ Model ST12400W PCB * U2 U17 U7 HDA U8 U16 U3 Q13 AG AT E Q4 U1 SE U11 U15 Q1 U2Ø Q2 U4 U5 U10 U14 U13 J1 Model ST12400WC PCB * Model ST12400WD PCB U2 U17 U2 U17 U7 U7 U16 U8 U8 U16 U3 U3 Q13 U15 * U11 Q13 U11 U15 U1 Q4 U1 Q1 Q4 Q1 U2Ø U2Ø Q2 Q2 U4 U4 U24 U5 U10 U5 J1 J1 *Bottom side of PCB Figure 7.4.
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26 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 7.4.2 Relative humidity The values below assume that no condensation on the drive occurs. a. Operating 8% to 80% relative humidity with a maximum gradient of 10% per hour. b. Non-Operating 5% to 95% relative humidity. 7.4.3 Effective altitude (Sea level reference) a. Operating -1000 to +10,000 feet (-305 to +3048 metres) b.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 27 _____________________________________________________________________________________ SE AG AT E B1 B1 B A1 1 A A B E X A Y Z D E1 C D1 C1 SE AG AT E E1 D1 C1 Z Y X E D C Figure 7.4.4-1.
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28 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 7.4.4.2 Vibration a. Operating The drive, as installed for normal operation, shall operate error free while subjected to continuous vibration not exceeding 5-22 Hz @ 0.040 inches (1.03 mm) displacement peak-to-peak 22-400 Hz @ 1.0 g Vibration may be applied in the X, Y, or Z axis. b.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 29 _____________________________________________________________________________________ 7.6 Mechanical specifications The following nominal dimensions are exclusive of the decorative front panel accessory. Refer to Figure 7.61 for detailed mounting configuration dimensions. Height: Width: Depth: Weight: 1.62 in 4.00 in 5.74 in 1.9 pounds 41.1 101.6 145.8 0.
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30 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ G C [3] D [1] F E A Notes: L [1] Mounting holes three on each side, 6-32 UNC. Max screw length into side of drive 0.15 in. (3.81 mm). Screw tightening torque 6.0 in-lb (.675 NM) max with minimum thread engagement of 0.12 in. (3.05 mm). [4] Pin 1 [2] Mounting holes four on bottom, 6-32 UNC. Max screw length into bottom of drive 0.20 in. (5.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 31 _____________________________________________________________________________________ 8.0 Media characteristics 8.1 Media description The media used on the drive has a diameter of approximately 95 mm (approximately 3.7 inches). The aluminum substrate is coated with a thin film magnetic material and overcoated with a proprietary protective layer for improved durability and environmental protection.
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32 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 9.0 Defect and error management The drive, as delivered, complies with this specification. The read error rate and specified storage capacity are not dependent upon use of defect management routines by the host (initiator).
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 33 _____________________________________________________________________________________ 10.0 Option/configuration headers 10.1 Drive ID/option select header Figure 10.1-1a shows a bottom view of the drive (PCB toward viewer) for the purpose of showing the drive ID and configuration option select jumper connectors for models ST12400W/WD. Figure 10.1-1c shows the jumper connectors for model ST12400WC. Figure 10.
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34 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev.
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36 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ Notes for Figure 10.1-1a, 10.1-1b and 10.1-1c: [1] Notes explaining the functions of the various jumpers on jumper header connectors J2, J1-auxiliary and J6 are given below in left to right order of jumper position. The term “default” means as standard OEM units are configured when shipped from factory.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 37 _____________________________________________________________________________________ continued from previous page [5] These jumper positions apply to model ST12400W only. [6] This jumper position applies to models ST12400W and ST12400WD only. [7] These signals are also on J1 (see Table 11.6.3-1c). The J2 and J6 jumper headers are not used if the J1 signals are used.
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38 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A ______________________________________________________________________________________ continued from previous page J2 Jumper Installation TE On Jumper Function Description (ST12400W only) With the jumper installed, the On-board (non-removable) terminator circuits are enabled (connected to the I/O lines). Default is jumper installed. Terminator circuits not connected to I/O lines.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 39 _____________________________________________________________________________________ continued from previous page SSP Used only as a cable connection for the reference index signal (REFIND+) (J1-6A and J6 Pin 6, bottom) for sync spindle feature. J1-10A or J6-10 provides ground. See paragraphs 10.2, 5.7 for description of synchronized spindle operation. When no cable is connected, no jumpers should be installed.
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40 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 10.2.1.2 Termination The reference index signal (REFIND+) is terminated with a 2 K ohm resistor. Each drive has a termination resistor located on the Main PCB. The terminator resistor is not removable and is always in the circuit. 10.2.1.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 41 _____________________________________________________________________________________ 11.0 Interface requirements 11.1 General description This section partially describes the interface requirements as implemented on the drives. The major portion of the interface requirements/implementation is described in the Seagate SCSI Interface Product Manual, P/N 77738479.
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42 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 11.2 SCSI interface messages supported Table 11.2-1 following lists the messages supported by the SCSI-1, SCSI-2 and SCSI-3 modes of the ST12400 Wide Family drives. Table 11.2-1.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 43 _____________________________________________________________________________________ 11.3 SCSI interface commands supported Table 11.3-1 following lists the SCSI interface commands that are supported in the SCSI-1, SCSI-2 and SCSI-3 modes of the drive. Hawk 2 Family (Wide bus) drives can be changed back and forth between SCSI1 and SCSI-2 modes using the Change Definition Command.
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44 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 45 _____________________________________________________________________________________ 11.3.1 Inquiry data 11.3.1.1 Standard Inquiry data Table 11.3.1-1 following lists the Inquiry command data that the drive should return to the initiator per the format given in the SCSI-2/SCSI-3 Interface Product Manual (P/N 77738479). Table 11.3.1-1.
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46 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 11.3.2 Mode Sense data The Mode Sense command provides a means for the drive to report its operating parameters to the initiator. The drive maintains four sets of Mode parameters, Default values, Saved values, Current values and Changeable values.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A* 47 _____________________________________________________________________________________ The following tables list the values of the data bytes returned by the drive in response to the Mode Sense command pages for SCSI-1, SCSI-2/SCSI-3 implementation (see SCSI Interface Product Manual, P/N 77738479). DEFINITIONS: DEF CHG = = Default value. Standard drives are shipped configured this way.
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48 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ Table 11.3.2-2.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 49 _____________________________________________________________________________________ 11.4 SCSI Bus Conditions and Miscellaneous Features Supported Asynchronous SCSI bus conditions supported by the drive are listed in Table 11.4-1. These conditions cause the SCSI device to perform certain actions and can alter the phase sequence. Other miscellaneous operating features supported are also listed here. Table 11.4-1.
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50 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 11.5 Synchronous data transfer 11.5.1 Synchronous data transfer periods supported Table 11.5-1 and 11.5-2 list Synchronous Data transfer periods supported by the drive. The data transfer period to be used by the drive and the initiator is established by an exchange of messages during the Message Phase of operation.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 51 _____________________________________________________________________________________ 11.6 Physical interface Figure 11.6-1 shows the locations of the physical interface components for the drive. Shown are the locations of the D.C. power connector, the SCSI interface connector, the I/O line terminators, and the drive select and option select header.
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52 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 11.6.1 DC cable and connector The model ST12400W/WD drive receives DC power through a 4 pin connector mounted at the rear of the main PCB (see Figure 11.6.3-1a). Recommended part numbers of the mating connector are listed below, but equivalent parts may be used (see Table 11.6.1-1). Table 11.6.1-1.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 53 ______________________________________________________________________________________ 11.6.2.2.3 General cable characteristics In general, cables having the characteristic impedance’s given above are not available; however, impedance’s that are somewhat lower are satisfactory. A characteristic impedance of 100 ohm ±10% is recommended for unshielded flat or twisted pair ribbon cable.
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54 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ SCSI Device Host Adapter/Initiator * * * T * 1 thru 16 SCSI Devices ** ** Disc Drive or Other SCSI Device Disc Drive or Other SCSI Device * T Disc Drive or Other SCSI Device VIEW B T indicates termination required Total Interface cable length must not exceed that specified in paragraph 11.6.2. (Including host adapter/ initiator).
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 55 _____________________________________________________________________________________ Position 1 Position 1 Position 1 .60 (15.24) .42 ref (10.67) .100 (2.54) 1.816 (46.13) Position 1 Position 1 Position 1 32 4 .218 (5.54) .050 (1.27) .20 typ (5.08) .065 x 45° chamfer typ (1.65) 1 .0787 (2.00) 1.650 (41.91) .834 ± .010 (21.18) .315 ± .010 (8.00) +.001 .083 –.002 dia (2.1) Trifurcated Pins (4 places) 3.650 (92.71) HDA .
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56 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ Recommended PCB or bulkhead mounted connectors are: Straight-in connector (most commonly used): Right angle to PCB connector: Seagate P/N: Amp US P/N: Amp Japan P/N: Seagate P/N: Amp US P/N: Amp Japan P/N: 77678703 2-557103-1 5-175475-9 * 77678559 2-557101-1 5-175474-9 Side View 7.00 (.276) 1.52 (.060) 2.70 (.106) 12.70 (.500) 1.32 (.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 57 ______________________________________________________________________________________ Table 11.6.3-1a. ST12400WD differential cable pin assignments (nonshielded connector) Note. The minus sign next to the signals indicates asserted state is the low voltage of the two levels used for logic signals .
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58 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A ______________________________________________________________________________________________________ Table 11.6.3-1b.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 59 ______________________________________________________________________________________ Note. The minus sign next to the signals indicates asserted state is the low voltage of the two levels used for logic signals. Table 11.6.3-1c.
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60 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 11.6.4 Electrical description The ST12400W/WC models use single ended interface signals. These signals must be terminated with 110 ohm active termination circuits at each end of the total cable. ST12400WC drives have no provisions for terminators on the PCB.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 61 _________________________________________________________________________________________ Line Driver Transmitter (or transceiver) Line Receiver (4) (1) TP TP (4) 110 Ohm Flat Cable Pair (1) Receiver 110 Ohm (3) (2) (2) [1] Part of active terminator circuits. Termination is required when the drive is first or last in the daisychain.
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62 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A ____________________________________________________________________________________________________________ 11.6.4.2 Differential drivers/receivers Typical differential driver and receiver circuits used by the model ST12400WD are shown in Figure 11.6.4-1. The drive has no provisions for terminator circuits on the drives. Differential signals All differential interface signals consist of two lines denoted +SIGNAL and -SIGNAL.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 63 _____________________________________________________________________________________ +5V Term (5) Power +5V 5.6K TE Transmit/Receive Enable (1) LSI RE XCVR DIFFSENS (6) Disable 330 Ohm (3) Twisted or Flat Cable Pair 1 Transmit or Receive Signal (2) 150 Ohm 1 R (4) 2 330 Ohm (7) SCSI Device at Beginning of I/O Cable (usually Host Adaptor/Initiator) +5V Term (5) Power +5V 5.
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64 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 11.6.4.2 Terminator requirements Drive I/O termination is not provided internally on ST12400WD or ST12400WC drives. Terminator circuits, must be provided in some manner external to the ST12400WD/WC drives by the user, systems integrator or OEM manufacturer.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 65 _____________________________________________________________________________________ 11.7 Disc drive SCSI timing Table 11.7-1. 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.
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66 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ continued from previous page Waveform Description Symbol [1] Asynchronous Data Transfer Characteristics: (continued) Next CDB Byte Access (Byte 2 of 10) T23.10.2 Next CDB Byte Access (Byte 3 of 10) T23.10.3 Next CDB Byte Access (Byte 4 of 10) T23.10.4 Next CDB Byte Access (Byte 5 of 10) T23.10.5 Next CDB Byte Access (Byte 6 of 10) T23.10.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A 67 _____________________________________________________________________________________ 12.0 Options All options are incorporated or packaged at the manufacturing facility. 12.1 Front panel The normal front panel available is black plastic. Other panel colors may be special ordered. Each panel has a single rectangular green LED indicator lens which, when glowing, indicates the drive is selected. 12.
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68 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A _____________________________________________________________________________________ 13.0 Accessories All accessories are designed for implementation by the customer. 13.1 Front panel kit Same as 12.1 but includes all mounting hardware to support field installation. 13.2 Installation manual This manual (P/N 77767465) provides basic information on the care and handling of Winchester disc peripherals in general.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. B 69 _____________________________________________________________________________________ 14.0 Seagate Technical Support services Seagate Technology provides technical support literature and diagnostic utilities to Authorized Distributors. Please contact your dealer for technical support and installation troubleshooting.
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70 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. C _____________________________________________________________________________________ Seagate Peripheral Family Listed below are some of the SEAGATE Peripheral family members. For specific information on each member, refer to the appropriate documents.
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Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev.
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Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 77767457, Rev.