S T 4 3 4 0 1 N D E L I T E 3 SEAGATE NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 5.25"/FH Cylinders 2735| | | Capacity form/unform 2912/ 3555 MB Heads 21| | | Seek time / track 11.0/ 1.7 ms Sector/track 99| | | Controller SCSI2 DI/WI/FAST Precompensation Cache/Buffer 512 KB SEGMENTED Landing Zone Data transfer rate 6.750 MB/S int Bytes/Sector 512 20.000 MB/S ext Recording method RLL 1/7 operating | non-operating -------------+-------------- Supply voltage 5/12 V Temperature *C 5 50 | Power: sleep W Humidity % 5 95 | standby W Altitude km | idle 33.0 W Shock g | seek W Rotation RPM 5400 read/write W Acoustic dBA spin-up W ECC Bit MTBF h 200000 Warranty Month 60 Lift/Lock/Park YES Certificates ********************************************************************** L A Y O U T ********************************************************************** SEAGATE ST43401N/ND PRODUCT DESCRIPTION +---------------------------------------------------------++-+J1 | || | ++ |+-+ ++LED |XX Power | |XX | | | Terminator 1+ |XX1 | || |XX SCSI | ++ |XX | TP+-1 |XX | 4-+ |XX | Terminator 1+ |XX | || |XX | ++ |XX | Spindle+-+| | Sync +-+|+-+J2 | || | +---------------------------------------------------------++-+ ST43401N 2 Terminator Resistor Sips ST43401ND 2 Terminator Resistor Dips ********************************************************************** J U M P E R S ********************************************************************** SEAGATE ST43401N/ND PRODUCT DESCRIPTION Jumper Setting ============== Spindle Sync +4--1+ TP Ground +J2-------+|o oo|A 4+--+3 12V +++ 5V +----J1-+ |o o o o o||o oo|B 2+--+1 | | | | |o o o o| |o o o o o|+----++-------------------------+ +-------+ |o o o o| -+4-2-1----+------+oooooooooooooooooooooooo1+-+ +-+-------+- +-+-+ | | |ooooooooooooooooooooooooo| |O O O O| | | | | SCSI | | +-SCSI-Cable-Connector----+ +-------+ | | | | ID | | | | | | | + Master OFF/Slave ON - Spindle Sync | | | | +-- Write Protect option enable | | | | | | | | Spinup Delay (10 secs * ID) --------------------------+ | | | Motor Start option enable ------------------------------+ | | Parity check disable -------------------------------------+ | Sweep Cycle enable -----------------------------------------+ SCSI ID ------- +----------+-----------------------+ | SCSI ID | Jumpers | | | ID4 | ID2 | ID1 | +----------+-------+-------+-------+ | 0 | OPEN | OPEN | OPEN | | 1 | OPEN | OPEN | CLOSED| | 2 | OPEN | CLOSED| OPEN | | 3 | OPEN | CLOSED| CLOSED| | 4 | CLOSED| OPEN | OPEN | | 5 | CLOSED| OPEN | CLOSED| | 6 | CLOSED| CLOSED| OPEN | | 7 | CLOSED| CLOSED| CLOSED| +----------+-------+-------+-------+ TP Terminator Power -------------------- 4+-+-+3 Initiator supplies power over the SCSI Bus for |X+-+ terminators. Drive supplies no terminator power. 2+-+-+1 4+-+-+3 Drive supplies power for its own terminator resistor-paks +-+-+ but not to SCSI Bus. (Default) 2+xxx+1 4+-+-+3 Drive supplies power for external terminator at end of |X|X| the daisy chain. Terminator resistor-paks must be 2+-+-+1 removed. This option is recommended only for last drive on daisy-chain. (This option only on Single-Ended drives) Terminator Resistor ------------------- The Model ST43401N has 2 SIPs. The Model ST43401ND has 2 DIPs. ********************************************************************** I N S T A L L ********************************************************************** SEAGATE ST43401N/ND/ST43402ND REFERENCE MANUAL 83327730 REV. C 12/94 Notes On Installation ===================== Mounting -------- The drive can be mounted using either side-mounting screws or bottom-mounting screws. Planning the system ------------------- This section supplements the installation instructions presented in the user's manual (publication 83327720). To aid in configuring the drive for specific system requirements, the following subjects are discussed: - Guidelines for enclosure design - Guidelines for proper air flow - Using the sweep cycle function Guidelines for enclosure design ------------------------------- The drive is a component for installation in an enclosure that you have designed. The enclosure design must provide for mounting the drive and power supply, cable routing, and cooling. See the next topic for guidelines on providing proper cooling. The system designer is responsible for obtaining any needed agency approvals such as UL, CSA, and VDE. Guidelines for proper air flow ------------------------------ Your enclosure design must ensure adequate cooling for the drive. We recommend orienting the drive or directing the air flow in a way that creates the least amount of air-flow resistance while providing air flow above the circuit boards and around the head and disc assembly (HDA). Also, choose the shortest possible path between the air inlet and exit. This minimizes the distance traveled by air that is heated by the drive and by other nearby heat sources. The airflow patterns can be created by the fans either pushing or drawing air. The overall flow pattern can be directed from front to back, back to front, or side to side. To evaluate the airflow design, place the drive in its final mechanical position and perform random read and write operations. After the temperatures stabilize, measure the surface (case) temperatures of the components. In some cases, the internal cables connect to a bulkhead that allows external shielded cables to be connected. Shielded cables must be used if the cables run between cabinets. Cumulative cable length in a daisy-chain system cannot exceed 25.0m (82.0 ft) for drives using differential I/O. With single-ended I/O, cumulative cable length cannot exceed 3.05m (10.0 ft). ST43402ND (dual port) drives have both I/O connectors (one for Port A and the other for Port B) located on the I/O board. You must use an adapter (part number 70935801) to terminate each I/O cable following the last drive in the daisy chain. ST43401N/ND (single-ended) drives are shipped with resistorpak terminators installed on the control board. Each end of the daisy-chain I/O cable must be terminated. If the resistorpak terminators are in place on the drive, external terminators are not needed. Single-ended terminators and differential terminators have different part numbers and electrical characteristics (they cannot be interchanged). Unshielded I/O cabling components ---------------------------------- Vendor part number Description ------------------------------------------------------------------ Connectors for cable ends AMP-786090-7 Connector, unshielded male, straight Connectors in daisy chain AMP-786096-7 Connector, shielded male, straight (two used per cable) Cable Hitachi-A3007-51-68T Flat cable, twisted-pair, 68-conductor, 30 AWG (for single-ended or differential I/O) Synchronized spindle cables --------------------------- Seagate Length part number 1.5 feet (0.46 meter) 70703929 3 feet (0.91 meter) 70703921 5 feet (1.52 meter) 70703922 7 feet (2.13 meter) 70703923 10 feet (3.05 meter) 70703924 20 feet (6.09 meter) 70703925 30 feet (9.14 meter) 70703926 40 feet (12.19 meter) 70703927 50 feet (15.24 meter) 70703928 Terminators ----------- Seagate Description part number Terminator resistor-pak, single-ended 96752447 Terminator resistor-pak, differential 70906701 Terminator, external shielded single-ended 89501152 Terminator, external shielded differential 89501030 Terminator, external unshielded single-ended 15387807 Terminator, external unshielded differential 15459255 Terminator, adapter for dual-port drives 70935801 Using the sweep cycle function ------------------------------ The sweep cycle is a feature that periodically moves the heads to different locations on the discs during intervals when the drive is idle. The following are highlights of the sweep cycle function: - Using the sweep cycle enhances drive reliability. We encourage you either to enable the drive sweep cycle or to use a sweep cycle controlled by the host (initiator). Consult with an analyst in making this choice. - The sweep routine consumes approximately 11 seconds of a 13-hour period. The drive is available to the system more than 99.98 percent of the time. - You may disable the sweep cycle (described below) without affecting the specified mean time between failures (MTBF) or warranty agreements. The drive is preset during manufacturing with the sweep cycle option selected. A jumper on the control board makes the selection. The other jumpers on the control board are discussed in the user's manual. The jumper is identified as Sweep Cycle Option, which either enables or disables the sweep cycle function. The jumper can be positioned as follows: - Jumper disconnected - disables the sweep cycle function - Jumper connected - enables the sweep cycle function Sweep movements, if enabled, can occur only in conjunction with seeks required by the controller or with any SCSI read or write operation having an implied seek. Each time the drive performs a sweep cycle, it starts a 12-minute timeout. When the timeout has elapsed, the drive performs another sweep cycle only when it receives the Seek command. When combining a sweep cycle with a seek, the drive performs the sweep cycle first and then executes the Seek command. If a sweep segment was initiated by the Seek command, the drive performs the sweep function and then moves the heads to the cylinder requested by the controller. If about 15 minutes elapse with no disc access commands received from the SCSI bus, the SCSI I/O logic sends a one-track seek command to the drive logic. This command causes the drive to perform its sweep cycle. Interface functions ------------------- This section provides an overview of the small computer system interface (SCSI) as it is used in the Elite drive. It is beyond the scope of this manual to provide a detailed description of all the features, capabilities, variations, and protocol of SCSI-2. This information is provided in the SCSI Interface Specification for the Elite Product Family (document 64721702). All communications between drive and controller must pass through the interface. This communication includes all commands, status, control signals, and read/write data transfers. The interface consists of the I/O cables and the logic (on part of the control board) required to process the signals sent between the drive and controller. Dual port drive (ST43402ND) considerations ------------------------------------------ ST43402ND dual port drives have some different operating limits from the single port drives discussed in this manual. These differences are listed below. - Dual port drives have separate sense buffers, synchronous transfer agreements, and unit attention conditions for each initiator on both ports. - Any initiator may place commands in the queue on either port. - Data placed in the cache by one port may be used to satisfy a read request from the other port. A write from one port may cause data cached by a read request from the other port to be purged from the cache. SCSI bus configuration ---------------------- The SCSI bus can have a maximum of 16 devices connected to it, and communication can occur between any 2 devices at any given time. The device that originates an operation is referred to as the initiator and the device that performs the operation is the target. The drive uses one unshielded I/O cable to attach it to the SCSI bus. You must supply all unshielded cables. Shielded cables are typically used for connections between cabinets where electromagnetic compatibility (EMC) and electrostatic discharge (ESD) protection are required. The I/O cable carries commands, data, and status information across the SCSI bus. ********************************************************************** F E A T U R E S ********************************************************************** SEAGATE ST43401N/ND/43402ND REFERENCE MANUAL 83327730 REV. C 12/94 Preface ------- This is a reference manual for users of Seagate ST43401N/ND and ST43402ND Elite disc drives employing the SCSI interface. It supplements the information presented in the user's manual (publication 83327720). It is intended to aid engineers who design subsystems using the drive and customer engineers who install and check out the drive. This manual should be used in conjunction with the user's manual. Electrostatic discharge protection ---------------------------------- Caution. Removal of circuit boards by personnel not performing depot repair will damage components and may void the warranty. All drive electronic assemblies are sensitive to static electricity due to the electrostatically sensitive devices used within the drive circuitry. Although some devices such as metaloxide semiconductors are extremely sensitive, all semiconductors, as well as some resistors and capacitors, may be damaged or degraded by exposure to static electricity. Electrostatic damage to electronic devices may be caused by the direct discharge of a charged conductor, or by exposure to the static fields surrounding charged objects. To avoid damaging drive electronic assemblies, service personnel must observe the following precautions when servicing the drive: - Ground yourself to the drive whenever the drive electronics are or will be exposed. Connect yourself to ground with a wrist strap (Seagate part number 12263496). Connection may be made to any grounded metal assembly. As a general rule, remember that you and the drive electronics must all be grounded to avoid potentially damaging static discharges. - Turn off power before removing or installing the DC power cable. - Do not remove any circuit boards from the drive. - Never use an ohmmeter on any circuit boards. 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 procedures in this manual as effective ways of servicing the unit. Some procedures require the use of special tools. For proper maintenance and safety, you must use these tools as recommended. The procedures in this manual contain warnings and cautions that must be carefully read and followed to minimize or eliminate the risk of personal injury. The warnings point out conditions or practices that may endanger you or others. The cautions point out conditions or practices that may damage the unit, possibly making it unsafe for use. You must also understand that these warnings and cautions are not exhaustive. We cannot possibly know, evaluate, and advise you of all the ways in which maintenance might be performed or the possible risk of each technique. Consequently, we have not completed any such broad evaluation. If you use a nonapproved procedure or tool, first ensure that the method you choose will not risk either your safety or unit performance. Always observe the following warnings and precautions: ------------------------------------------------------ - Perform all maintenance by following the procedures in this manual. - Follow all cautions and warnings in the procedures. - Use sound safety practices when operating or repairing the unit. - Use caution when troubleshooting a unit that has voltages present. Remove power from the unit before servicing it. - Wear safety shoes when removing or replacing heavy parts. - Ensure that the internal temperature of the rack or cabinet will not exceed the limits defined for the drive when the drive is mounted in an equipment rack or cabinet. When units are stacked vertically, pay special attention to the top where temperatures are usually highest. - Follow the precautions listed under "Electrostatic discharge protection" above. - Do not remove any circuit boards from the drive chassis. Return the entire drive for depot repair if any circuit board is defective. Removal of circuit boards by personnel not performing depot repair will damage components and may void the warranty. - Do not remove the head and disc assembly (HDA) from the drive chassis. Return the entire drive for depot repair if the HDA is defective. - Do not attempt to disassemble the HDA. It is not field repairable. If the sealed HDA is opened by personnel not performing depot repair, this will damage components and void the warranty. - As a component, this drive is designed to be installed and operated in accordance with UL1950, IEC950, EN60950, CSA C22.2 950, and VDE0805. - Ensure that the power supply meets the specifications in this manual and is designed to be used in accordance with UL1950, IEC950, EN60950, CSA C22.2 950, and VDE0805. Seagate takes all reasonable steps to ensure that its products are certifiable to currently accepted standards. Typical applications of these disc drives include customer packaging and subsystem design. Safety agencies conditionally certify component assemblies, such as the Elite disc drive, based on their final acceptability in the enduse product. The subsystem designers are responsible for meeting these conditions of acceptability in obtaining safety/regulatory agency compliance in their end-use products and in certifying where required by law. A necessary part of meeting safety requirements is the provision for overcurrent protection on drive SELV supply voltages. This unit is a component part and as such is not meant to comply with FCC or similar national requirements as a standalone unit. Engineering radiated and conducted emissions test results are available through the Seagate Safety Department to assist the subsystem designer. General maintenance information ------------------------------- This section contains general information relating to maintenance of the drive. You should be familiar with the information in this section and with drive operation before attempting any maintenance procedures. Information is divided into the following areas: - Maintenance tools and materials_lists the tools and materials required to perform maintenance on the drive - Testing the drive_provides information concerning testing drive electronics, including a procedure for checking DC voltages supplied to the drive. - Identifying assemblies in the drive_identifies the various parts of the drive. Note. Refer to the user's manual (publication 83327720) for information about arranging for depot repair, removing and replacing a drive or power supply, and packing a drive for shipment. Maintenance tools and materials ------------------------------- The procedures described in this section require the use of certain special tools, test equipment, and materials. These are listed below along with the Seagate part number. Note that the list includes only special tools. We assume that you have normal maintenance tools. Testing the drive ----------------- During testing and troubleshooting, the drive normally performs various operations such as reading and writing test data. System software can be used to control the drive during these operations. Refer to manuals or other documentation applicable to the specific system or subsystem for information concerning the system software routines. The following procedure provides an overall check of the DC voltages used by the drive. Before performing this procedure, you should be familiar with the other information in this section and the safety information in the preface. Planning the system ------------------- This section supplements the installation instructions presented in the user's manual (publication 83327720). To aid in configuring the drive for specific system requirements, the following subjects are discussed: - Guidelines for enclosure design - Guidelines for proper air flow - Guidelines for I/O cabling - Using the sweep cycle function Guidelines for enclosure design ------------------------------- The drive is a component for installation in an enclosure that you have designed. The enclosure design must provide for mounting the drive and power supply, cable routing, and cooling. See the next topic for guidelines on providing proper cooling. The system designer is responsible for obtaining any needed agency approvals such as UL, CSA, and VDE. As described in the user's manual, the drive can be mounted using either side-mounting screws or bottom-mounting screws. Interface functions ------------------- This section provides an overview of the small computer system interface (SCSI) as it is used in the Elite drive. It is beyond the scope of this manual to provide a detailed description of all the features, capabilities, variations, and protocol of SCSI-2. This information is provided in the SCSI Interface Specification for the Elite Product Family (document 64721702). All communications between drive and controller must pass through the interface. This communication includes all commands, status, control signals, and read/write data transfers. The interface consists of the I/O cables and the logic (on part of the control board) required to process the signals sent between the drive and controller. SCSI bus configuration ---------------------- The SCSI bus can have a maximum of 16 devices connected to it, and communication can occur between any 2 devices at any given time. The device that originates an operation is referred to as the initiator and the device that performs the operation is the target. The drive uses one unshielded I/O cable to attach it to the SCSI bus. You must supply all unshielded cables. Shielded cables are typically used for connections between cabinets where electromagnetic compatibility (EMC) and electrostatic discharge (ESD) pro-tection are required. The I/O cable carries commands, data, and status information across the SCSI bus. Figure 12 shows the lines (except those not used) in the I/O cable. Error code ---------- This two-byte value provides information about what part of the diagnostic operation has failed. The error codes are shown in Table 16. Table 16. Error codes Code | Description --------+---------------------------------------------------------- 0001H | Formatter diagnostic error --------+---------------------------------------------------------- 0002H | Microprocessor RAM diagnostic error --------+---------------------------------------------------------- 0004H | No drive ready --------+---------------------------------------------------------- 0008H | No sector or index detected --------+---------------------------------------------------------- 0009H | Fatal hardware error while doing drive diagnostics --------+---------------------------------------------------------- 000CH | No drive command complete --------+---------------------------------------------------------- 0010H | Unable to set drive sector size --------+---------------------------------------------------------- 0014H | Unable to clear drive attention 0018H Unable to start | spindle motor --------+---------------------------------------------------------- 0020H | Unable to recalibrate drive --------+---------------------------------------------------------- 0030H | Unable to send write current data to drive --------+---------------------------------------------------------- 0034H | Unable to issue drive seek command --------+---------------------------------------------------------- 0040H | Unable to read user table from drive --------+---------------------------------------------------------- 0041H | Ran out of sectors while doing drive diagnostics --------+---------------------------------------------------------- 0042H | Unable to read reallocation table --------+---------------------------------------------------------- 0043H | Unable to read ETF log --------+---------------------------------------------------------- 0044H | Unable to read firmware stored on disc --------+---------------------------------------------------------- 0045H | Firmware read from disc or sent by host has an invalid | checksum --------+---------------------------------------------------------- 0060H | Thermal calibration failure --------+---------------------------------------------------------- 0070H | Microprocessor internal timer error --------+---------------------------------------------------------- 0080H | Buffer controller diagnostic error --------+---------------------------------------------------------- 0081H | Buffer RAM diagnostic error --------+---------------------------------------------------------- 00C1H | Data miscompare while doing drive diagnostics --------+---------------------------------------------------------- 00F0H | PROM checksum error --------+---------------------------------------------------------- 00F1H | CPU error --------+---------------------------------------------------------- 00F2H | SCSI protocol chip error --------+---------------------------------------------------------- 00F3H | ECC subsystem error --------+----------------------------------------------------------