Seagate ST43400N/ND User Manual
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Seagate ST43400N/ND User Manual

Seagate ST43400N/ND User Manual

Elite disc drive
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Summary of Contents for Seagate ST43400N/ND

  • Page 1 ......ST43400N/ND ......

  • Page 2: Table Of Contents

    Section 1. General description ... Section 2. Installation ... Section 3. Operation ... Section 4. Parts data ... Section 5. Maintenance ... © 1992 Seagate Technology, Inc. All rights reserved Publication Number: 83327630, Rev. A ® Seagate , Seagate Technology trademarks of Seagate Technology, Inc.

  • Page 3: Preface

    ST43400N/ND User’s Manual Preface This manual contains information for users of the Seagate ST43400N and ST43400ND Elite disc drives employing the SCSI interface. It provides instal- lation, operation, and maintenance information. This manual also lists the part numbers for options and accessories available for these drives. Additional information is available in the reference manual (publication 83327640).

  • Page 4: Important Safety Information And Precautions

    Important safety information and precautions Caution. Use forced-air ventilation when bench-testing the drive to ensure proper cooling of drive components. Use proper safety and repair techniques for safe, reliable operation of this unit. Service should be done only by qualified persons. We recommend the proce- dures in this manual as effective ways of servicing the unit.
  • Page 5 UL1950, IEC950, EN60950, CSA C22.2 950, and VDE0806. Refer to section 2 for information about installation. If you do not use a Seagate power supply, ensure that the supply meets the specifications in this manual and is designed to be used in accordance with UL1950, IEC950, EN60950, CSA C22.2 950, and VDE0806.

  • Page 6: Technical Support Services

    These are toll calls if you dial from outside of the number’s local dialing area. SeaFAX: (408) 438-2620 You can use a Touch-Tone telephone to access Seagate’s automated FAX delivery system and select technical support information by return FAX. This service is available twenty-four hours a day, seven days a week.

  • Page 7: Section 1. General Description

    Section 1. General description The Seagate ST43400N/ND Elite 3 disc drives are high speed, random access digital data storage devices. They communicate with an initiator using the Small Computer System Interface (SCSI). The drive is shown in Figure 1, and its specifications are listed in Table 1 on the following page.
  • Page 8 Table 1. Drive specifications Characteristics Conditions Size Dimensions Weight (drive only) Weight (power supply only) Interface Fast SCSI-2 Recording Total capacity (unformatted) Bytes per track (unformatted) Inner track Outer track Formatted capacity* (256-byte sectors) (512-byte sectors) (1,024-byte sectors) Number of discs Recording heads Servo heads Physical heads per surface...
  • Page 9 General description continued from previous page Characteristics SCSI transfer rate, burst Seek time (time required to move heads to a different track address— excluding SCSI I/O overhead) Typical access times Latency (time required to reach a particular track address after head positioning is complete) Start time** Stop time...
  • Page 10 The drive contains all the circuits and mechanical devices necessary to record data on and recover it from its discs. The drive requires DC voltage input from an external power supply, which receives its AC input power from the site main power source.
  • Page 11 General description Selection SCSI Controller Read/Write Initiator I/0 Lines Orientation Detection Figure 2. Drive functional block diagram After arriving at the data track and selecting a head, the controller locates the portion of the track where the data is to be read or written. This is called track orientation.

  • Page 12: Section 2. Installation

    Section 2. Installation The information contained in this section describes installation and initial checkout of the drive. Site requirements The site requirements considered are environment, airflow, space, power, grounding, and interface. Environmental requirements All environmental requirements for the drive are listed in Table 2 below. Table 2.
  • Page 13 Airflow requirements The enclosure design must ensure adequate cooling for the drive. Note that the fan in the power supply cools only the power supply’s internal parts. The drive’s product specification (document 64403601) describes how to evaluate the airflow design. The evaluation consists of ensuring that the case temperatures of certain critical components remain within acceptable limits during drive operation.
  • Page 14 Installation Note. Air flow in the direction shown (front to back) or in reverse direction (back to front) Note. Air flow in the direction shown or in reverse direction (side to side) Figure 3. Suggested airflow Above unit Under unit Above unit Under unit...
  • Page 15 Space requirements The drive is designed to be mounted in one of the three orientations shown in Figure 4. The drive may be mounted on its base or on either side. Mounting orientations other than those shown are not permitted. The physical dimen- sions of the drive and power supply are shown in Figure 5.
  • Page 16 Installation 83 mm 3.25 in 147 mm 5.75 in 70 mm 2.75 in 141 mm 5.57 in Figure 5. Dimensions of the drive and power supply Drive 204.72 mm 8.06 in max Power Supply 202 mm 8.00 in...
  • Page 17 Power requirements The voltage and current requirements for a single drive at cylinder 0 are shown in Table 3. Table 3. Single drive voltage and current requirements Current without Internal Terminator Seeking Voltage Idle Reading SCSI single-ended interface +5 V 1.87 A 1.91 A +12 V...
  • Page 18 Installation AC power requirements for the optional Seagate power supply are listed in Table 4 below. Conversion to the different line voltages is explained in the installation procedures. Table 4. Power supply AC power requirements Specifications 100–120 VAC Voltage range...
  • Page 19 Term SCSI Device SCSI Device SCSI Device SCSI Device Figure 6. SCSI bus configuration A connector (J06) at the back of the drive accepts the I/O cable that connects it to the system. The daisychain cable is a continuous unshielded cable having one connector for each drive it connects to.
  • Page 20 Installation Table 5. Unshielded single-ended I/O cabling Signal Name DB- (0) DB- (1) DB- (2) DB- (3) DB- (4) DB- (5) DB- (6) DB- (7) DB- (P) GROUND GROUND GROUND TERMPWR GROUND GROUND ATN- GROUND BSY- ACK- RST- MSG- SEL- C/D- REQ- I/O-...
  • Page 21 Table 6. Unshielded differential I/O cabling Signal Name Pin Number (GROUND) DB(0) DB(1) DB(2) DB(3) DB(4) DB(5) DB(6) DB(7) DB(P) DIFFSENS GROUND TERMPWR GROUND GROUND GROUND Pin Number Signal Name GROUND DB- (0) DB- (1) DB- (2) DB- (3) DB- (4) DB- (5) DB- (6) DB- (7)
  • Page 22 Installation Unpacking, inspection, and repacking After removing the packing material, inspect the drive for shipping damage. Save all packing materials for future use. The drive is shipped separately from any other items ordered for the installation. Unpacking 1. Allow the drive temperature to approach the ambient temperature of the unpacking area.
  • Page 23 Installation procedures With the site requirements completed, the enclosure designed, and the drive unpacked, you are ready to begin the installation. The following procedures are included in drive installation: • Setting the control board jumpers • Installing the power supply •...
  • Page 24 Installation Terminator Resistor-Paks (must be installed if drive is at either end of daisychain) SCSI Selectors Write Protect (WP) Master/Slave (MS) Select SCSI ID, write protect, and master/slave options by placing jumpers as shown below. SCSI ID = 0 SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4...
  • Page 25 Installing the power supply A power supply and AC power cord are available if desired. The power supply is configured before shipment to operate in one of two AC input voltage ranges. The voltage select plate on the power supply (see Figure 8) indicates the factory- preset voltage range.
  • Page 26 Installation DC Output Connector Pin 1 Ground Strap (to cabinet safety ground) DC Power Cable AC Power Connector Voltage Select Plate On / Standby Switch Figure 8. Power supply installation Chassis Safety Ground Screw Cooling Fan (air inlet) Bottom-Mounting Screws (4) Voltage Select Switch Side-Mounting...
  • Page 27 Installing an optional bezel Use the following procedure to attach an optional bezel to the drive. The bezel is available as an accessory (see section 4). 1. Remove the backing from the double-sticky tape attached to the rear surface of the bezel. 2.
  • Page 28 Installation Socket Plug Active Bezel Mounting Boss Figure 9. Attaching a bezel Control Board Chassis Chassis Mounting Holes (2)
  • Page 29 Mounting the drive The drive may be secured to the enclosure via tapped holes in either the sides or the bottom of the drive chassis. Figure 10 shows two of the three allowable orientations. Note. The mounting screws must be completely engaged in the drive chassis, but the portion that extends into the chassis must not exceed 3.2 mm (0.125 in) in length.
  • Page 30 Installation 6-32 Bottom-Mounting Screws (4) Pin 1 DC Power Cable NOTE: Either side- or bottom-mounting screws can be used with each drive orientation Figure 10. Mounting the drive DC power and pin connector assignments Drive Power +12 VDC +12 Volts return +5 Volts return +5 VDC DC Power...
  • Page 31 Connecting the system I/O cabling Be sure that the site has been prepared in accordance with the site requirements information provided earlier in this section. This procedure describes how to cable the system in a daisychain configuration. This configuration was discussed earlier in this section under “Interface require- ments.”...
  • Page 32 Installation Figure 12 shows how the terminator resistor-paks are attached on drives with single-ended I/O. The terminator resistor-paks, which are single inline pack- ages, mount in the rows of holes located in the control board. Ensure that they are installed with the correct orientation (indicated by a dot above pin 1) to terminate these drives.
  • Page 33 Figure 13 shows how the terminator resistor-paks are attached on drives with differential I/O. These terminator resistor-paks, which are dual inline packages, mount in sockets in the control board. These terminators are also marked with a dot above pin 1. If the drive is located at either end of the daisychain, ensure that it has resistor-pak(s) installed.
  • Page 34 Installation Synchronizing the spindle The spindle sync feature makes it possible to synchronize the spindle rotation of a group of disc drives. This reduces the latency normally encountered when the initiator switches between multiple disc drives. Figure 14 shows two system configurations. In one type of system, one of the disc drives in the system provides the reference clock.
  • Page 35 To enable the feature, it is necessary to run an additional daisychain cable from drive to drive and to make a master/slave selection for each drive. Connector J5 on the control board handles the cable connections. Master/slave selection is made by a jumper on connector J4A. Figure 15 shows the two connectors. For a drive at the end of the daisychain, the cable connects to one of the two rows of pins (row A or row B), and a terminator connects to the other row of pins, as shown in Figure 15.
  • Page 36 Installation For each drive in the middle of the daisychain, the cable from the preceding unit connects to one of the two rows of pins (row A or row B), and the cable to the next unit connects to the other row of pins. There are two ways to establish a drive as a master (supplying the sync reference signal to all drives connected for spindle sync).
  • Page 37 Verification After installing the drive, follow the sequence outlined below for initial startup. 1. Place the on/standby switch in the on ( l ) position. What follows depends on the setting of the Start Command option and the Spinup Delay option jumpers on the control board.

  • Page 38: Section 3. Operation

    Section 3. Operation This section provides the information and instructions to operate the drive. It includes the following topics: • Switches and indicators—locates and describes the switches and indicators used for normal drive operation. • Operating instructions—describes procedures for operating the drive. Switches and indicators Following initial checkout, the drive normally requires no attention from the operator.
  • Page 39 Ready LED (green) Control Board Drive Power Supply On / Standby Switch Note. Differential unit shown. Figure 16: Switches and indicators Socket for Active LED (red) Heartbeat LED (green) Active LED (on optional bezel) Standby = On = I...
  • Page 40 Operation Table 7. Switches and indicators Switch or Indicator Function Power supply On/standby switch Applies DC operating voltages to the drive electronics and (on/ power supply fan when placed in the on ( l ) position. Drive control board Ready LED This LED flashes during the power on sequence until the (green) discs are up to speed and the heads are loaded.
  • Page 41 Operating instructions Following initial checkout, the drive normally requires no attention from the operator. DC power is available to the drive, as the on/standby switch on the power supply is normally left in the on ( l ) position. If you wish to verify that the drive has completed its power on sequence, gain access to the drive, and check that its Ready LED is on steady and that the Heartbeat LED is blinking (see Figure 16).

  • Page 42: Section 4. Parts Data

    Because the drive is depot repairable, there are no field- replaceable parts. If the drive requires maintenance, refer to the instructions in section 5. Within the continental U.S., you can order accessories from: Seagate Technology, Inc. Customer Services 7801 Computer Avenue South Minneapolis, MN 55435...
  • Page 43 Table 8 below lists the part numbers for options and accessories for system installation. Table 8. Options and accessories Part Number Description 12263496 Static ground wrist strap, 6 1/2 to 8 inch wrist I/O cables External terminators 96752447 Terminator resistor-pak, single-ended 15479501 Terminator resistor-pak, differential 47188890...

  • Page 44: Section 5. Maintenance

    Section 5. Maintenance This section contains the following maintenance information: • Observing maintenance precautions • Arranging for depot repair • Removing and replacing a drive • Removing and replacing a power supply • Packing a drive for shipment Observing maintenance precautions Because the drive is depot repairable, there are no field-replaceable parts.

  • Page 45: Removing And Replacing A Drive

    Arranging for depot repair Before returning any units to Seagate, it is necessary to obtain a returned material authorization (RMA) number. To get the number, you will need to know the part number and serial number of the unit. These numbers appear on a label located on the front surface of the HDA.
  • Page 46 (saved during installation). Comply with the packing instructions to ensure that the drive will be undamaged in shipment. To obtain packing instructions or a new shipping container, contact: Seagate Technology, Inc. Customer Services 7801 Computer Avenue South Minneapolis, MN 55435...
  • Page 48 Maintenance...
  • Page 49 Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, CA 95066-4544, USA Publication Number: 83327630, Rev. A...

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Elite st43400nElite st43400nd

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