W R E N V I H H 9 4 2 4 1 - 5 0 2 CDC NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 5.25"/HH Cylinders 1261| | | Capacity form/unform 337/ 382 MB Heads 7| | | Seek time / track 14.0/ 3.0 ms Sector/track | | | Controller SCSI1 SINGLE-ENDED Precompensation Cache/Buffer 32 KB Landing Zone Data transfer rate 2.750 MB/S int Bytes/Sector 512 4.700 MB/S ext SYNC Recording method RLL 1/7 operating | non-operating -------------+-------------- Supply voltage 5/12 V Temperature *C 10 50 | -40 70 Power: sleep W Humidity % 8 80 | 5 95 standby W Altitude km -0.305 3.048| -0.305 12.210 idle 16.0 W Shock g 2 | 40 seek 20.0 W Rotation RPM 3600 read/write W Acoustic dBA spin-up W ECC Bit MTBF h 100000 Warranty Month Lift/Lock/Park YES Certificates CSA,FCC,IEC380,IEC435,SDA,... ********************************************************************** L A Y O U T ********************************************************************** SEAGATE ST2383N/2502N PRODUCT MANUAL 77765414-C (12-91) +------------------------------------------------------++-+J2 | || |Drive | || |Select/ | |+-+Option | +-1 |XX | | | |XX SCSI | +-+ |XX Interface | Resistor +-1 |XX J3 | Terminator | | |XX | Packs +-+ |XX | +-+ |XX | | | |XX | +-1 |XX | | | |XX Power | |XX +------------------------------------------------------+ ********************************************************************** J U M P E R S ********************************************************************** SEAGATE ST2383N/2502N PRODUCT MANUAL 77765414-C (12-91) Jumper setting ============== SCSI ID/Option Select Header ---------------------------- +------------------------------+ | o o o o o o o o o 1 | | o o o o o o o o o o | +------------------------------+ (6)(6)(6)(3)(2) 4 2 1 TP TP +------------+----------+ | | 4 2 1 | +------------+----------+ Drive ID in binary coded jumper |SCSI ID = 0 | o o o | position (most significant bit on | | o o o | left), i.e., jumper in position 1 +------------+----------+ would be Drive ID 1, no jumpers means |SCSI ID = 1 | o o x | ID 0. | | o o X | +------------+----------+ |SCSI ID = 2 | o x o | | | o X o | +------------+----------+ |SCSI ID = 3 | o x x | | | o X X | +------------+----------+ |SCSI ID = 4 | x o o | | | X o o | +------------+----------+ |SCSI ID = 5 | x o x | | | X o X | +------------+----------+ |SCSI ID = 6 | x x o | | | X X o | +------------+----------+ |SCSI ID = 7 | x x x | | | X X X | +------------+----------+ (2) CLOSED Enables the Motor Start Option. In this mode of operation the drive will wait for a Start Unit Command from the Host before starting the Motor. OPEN The motor will start as soon as DC power is applied to the unit. (3) CLOSED Parity checking by the WREN 6HH is enabled. (4) If the unit is not be terminated, remove terminator resistor module SIPs. If installed, the TP jumper must be installed in either Position 1 or Position 3 as indicated. Position 2 +-------------------------+----+ | o o o o o o o o X X-+--Position 1 | o o o o o o o o XxxX | +---------------------------+--+ (6)(6)(6)(3)(2) 4 2 1 TP|TP +-------Position 3 With jumper in Position 1, terminator power (+5V) is taken from WREN 6HH power connector. With jumper in Position 2, terminator power is supplied to the interface cable by the WREN 6 through an isolation diode and fuse network. With the jumper in Position 3, terminator power is taken from the interface cable Pin 26 through a fuse. If the drive is not terminated, the TP jumper in position 1 need not be installed. (6) Factory use only (8,9) and (10) reserved jumper position. (7) ON Entire drive is write protected. (8) Jumper on enables delayed motor start (Motor Start jumper (2) must be off). Motor start up is delayed 16 times drive ID number in seconds; i.e., Drive 0 starts immediately, Drive 1 starts 16 seconds later, Drive 2 starts 16 seconds after Drive 1, etc. No Motor Start command is needed to start drives with this jumper on. DC Power and pin connector assignments -------------------------------------- +------------+ pin 1 +12 VDC | 4 3 2 1 | pin 2 +12 Volts Return +------------+ pin 3 + 5 Volts Return pin 4 + 5 VDC Note: Pins on the drive select and configuration select header are provided to facilitate manual drive configuration. No devices other than jumpers should be connected to these pins. Improper connection to external devices (switches, connectors, etc.) could adversely affect drive performance. Exact location of these pins and headers may change without notice. ********************************************************************** I N S T A L L ********************************************************************** SEAGATE ST2383N/ST2502N PRODUCT MANUAL 7776514-C (12-91) Notes on installation ===================== Drive Orientation ----------------- The balanced rotary arm actuator design of the Wren 6 HH allows it to be mounted in any orientation. All drive performance characterization however, has been done with the drive in horizontal (disc level) and vertical (drive on its side) orientations, and these are the two preferred mounting orientations. WREN 6 HH is designed, manufactured, and tested with a "Plug-in and Play" installation philosophy. This minimizes the requirements for highly trained personnel to integrate the WREN 6 HH into an OEM's system, wether in a factory or field environment. Mounting Holes -------------- Mounting Holes (6-32 UNC-2B). Four on bottom, four on each side. Max. screw length into chassis 0.125 in. (3.17 mm). Cooling ------- Cabinet cooling must be designed by the customer so that the ambient temperature immediately surrounding the WREN 6 HH will not exceed temperature conditions. Service Tools ------------- No special tools are required for site installation or recommended site maintenance. The depot repair philiosophy of WREN 6HH precludes the necessity for special tools. If field repair of items external to the HDA is desired, a 6 point Torx T10 driver is required. This may be purchased through most commercial tool catalogs. Physical Description -------------------- Model ST2383N/502N WREN may be chained together or with other compatible SCSI devices using a common cable. Both ends of the cable must be terminated. The WREN 6HH implements single ended drivers and receivers, which allow a maximum cable length of six metres (primarily for connection within a cabinet). All signals are common between all SCSI devices. The Model ST2383N/502N WREN 6HH may be daisychained only with SCSI devices with single ended drivers and receivers. A maximum of 8 SCSI devices (including the Host) may be daisychained together. The SCSI Devices at both ends of the daisychain are to terminated. Intermediate SCSI devices shall not be terminated. Remove the terminator resistor packs, not the terminator power source selector jumper. Cable Requirements ------------------ Only nonshielded cable connectors are applicable. A 50 conductor flat cable or 25 twisted pair cable shall be used. The maximum total cable length shall be 6.0 metres. A stub length of no more than 0.1 metre is allowed off the mainline interconnection within any connected equipment. An ideal impedance match with cable terminators implies a cable characteristic impedance of 132 ohm (single ended option). In general, cables with this high of a characteristics impedance are not available; however, impedances that are somewhat lower are satis- factory. A characteristic impedance of 100 ohm 10% is recommended for unshielded flat or twisted pair ribbon cable. However, most available cables have a somewhat lower characteristic impedance. To minimize discontionuities and signal reflections, cables of different impedances should not be used in the same bus. Implementations may require trade-offs in shielding effectiveness, cable length, the number of loads, transfer rates, and cost to achieve satisfactory system operation. If shielded and unshielded cables are mixed within the same SCSI bus, the effect of impedance mismatch must be carefully considered. A minimum conductor size of 28 AWG should be used to minimize noise effects. Suggested nonshielded flat cable part numbers are: Flat cable 3M-3365-50 Twisted pair Spectra twist in flat 455-248-50 Equivalent parts may be used. Connector Requirements ---------------------- The nonshielded cable connector shall be a 50 conductor connector constisting of to rows of 25 female contacts with adjacent contacts 100 mils apart. Recommended Mating Flat Cable Connector Part Numbers are: Closed end 3M-3425-7000 W/O Strain Relief, No Center Key (for cable 3M-3425-7050 With Strain Relief, No Center Key ends) Dupont-66900-290 With Strain Relief, With Center Key Open end 3M-3425-6000 W/O Strain Relief, No Center Key (In Daisy- 3M-3425-6050 With Strain Relief, No Center Key chain) Dupont-66900-250 With Strain Relief, With Center Key The Model ST2383N/502N WREN 6HH device connector is a nonshielded 50 conductor connector consisting of two row of 25 male pins with adjacent pins 100 mils apart. The connector is keyed. Drive Connector Part Number: Berg - 65496 - 031 or equivalent. +--------------SCSI-DEVICE-----------------+ | +--+ HOST ADAPTER/INITIATOR *** | | |T | | +-------++-+-------------------------------+ *| | | 1 thru 8 SCSI devices +---------------+--------------+ **| **| |* +--------+---+ +---------+--+ +--------++-++ |WREN | |WREN | |WREN | T|| |or other | |or other | |or other+--+| |SCSI device | |SCSI device | |SCSI device | +------------+ +------------+ +------------+ * Closed end type connector used ** Open type (in-line application) Connector used. *** Host need not beon the end of the daisy chain. Another device can be on the end with the terminator, the host having no terminator. T indicates termination required. DC Cable and Connector ---------------------- The WREN 6 HH receives DC power through a 4 pin right angle connector mounted on the servo PWA. Recommended part number for the mating connector are listed below, but equivalent parts may be used. Type of cable: 14 AWG Connector: AMP 1-480424-0 Contacts: AMP 60619-4 (Loose Piece); AMP 61117-4 (Strip) Electrical Description ---------------------- All interface signals with the Model ST2383N/502N WREN 6HH are single ended and must be terminated with 220 ohm to +5 V and 330 ohm to ground at each end of the total cable. All signals use open collector or three state drivers. Optional termination is available internal to the WREN 6HH. Single Ended Drivers/Receivers ------------------------------ Single ended drivers and receivers are used by the WREN 6HH. Transmitter Characteristics --------------------------- The WREN 6HH uses an ANSI SCSI compatible open collector single ended driver. This driver is capable of sinking a current of 48 mA with a low level output voltage of 0.4 volt. Receiver Characteristics ------------------------ The WREN 6HH uses a ANSI SCSI single ended receiver with hysteresis gate or equivalent as a line receiver. Terminator Requirements ----------------------- Internal WREN 6HH I/O termination consist of three resistor modules which plug into sockets on the Main PWA. The WREN 6HH may be ordered with or without these termination resistors to facilitate a particular application. All single initiator/single target (non- daisychain) applications require that the Initiator and WREN 6HH be terminated. Daisychain applications require that only the unit at each end of the daisychain be terminated. All other peripherals on the chain should not be terminated. Note: Remove terminator resistor packs where terminators are not required. Removal of terminator power source selection jumper does not disconnect the terminator resistor from the circuit. Drive Termination ----------------- This option may be incorporated during manufacture at the request of the customer. Termination consists of three 220/330 ohm Sip resistor modules which are installed on the Main PWA via sockets. The user may install or remove these as desired. Terminator Power ---------------- The WREN 6HH may be configured to power the internal termination resistors via Pin 26 of the SCSI bus or via the wREN 6HH power connector. Termination power may also be supplied to Pin 26 of the SCSI bus through an isolation diode and fuse network. Single ended SCSI devices providing termination power (TERMPWR) shall have the following characteristics: V TERM = 4.0V to 5.25V 800 mA min source drive capability 1.0 A maximum ********************************************************************** F E A T U R E S ********************************************************************** SEAGATE ST2383N/2502N PRODUCT MANUAL 77765414-C (12-91) General Description ------------------- The WREN 6HH is 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. Standards --------- The WREN 6HH has been developed as a system peripherals to the highest standards of design and construction. The WREN 6HH depends upon its host equipment to provide adequate power and environment in order to achieve optimum performance and compliance with applicable industry and governmental regualations. Special attention must be given in the areas of safety, power distribution, shielding, audible noise control, and temperature regulation. The WREN 6HH complies with Seagate standards. The WREN 6HH is a UL Recognized component per UL 478 and a CSA Certified component per CSA C22.2 No. 220-M1986. It also meets the requirements of DIN IEC 380/VDE 0806/8.81, DIN IEC 435/VDE 0805/11.84 and EN 60950/09.87. The WREN 6HH product as delivered, is designed for system integration and installation into a suitable enclosure prior to use. As such, the WREN 6HH is supplied as a sub-assembly and is not subject to Subpart J of Part 15 of the FCC Rules and Regulations nor the Radio Interference Regulations of the Canadian Department of Communications. However, the unit has been tested using proper shielding and grounding and found to be compliant with the Class A limits of the FCC Rules and the Regulations of the Canadian Depart- ment of Communications. The physical design characteristics of the WREN 6HH serve to minimize radiation when installed in an enclosure that provides reasonable shielding. As such, the WREN 6HH is capable of meeting the Class B limits of the FCC Rules and the Regulations. of the Canadian Department of Communications. However, it is the end user's responsibility to assure that the WREN 6HH meets the appropriate EMI requirements in their system. Shielded I/O cables may be required if the enclosure does not provide adequate shielding. If I/O cables are external to the enclosure, shielded cables should be used, with the shields grouned to the enclosure and to the host controller. The Head/Disc/Actuator Assembly (HDA) is environmentally sealed at the factory. Air is recirculated within the HDA through a nonreplace- able filter to ensure the maintain free disc/actuator environment. The WREN 6HH uses a dedicated landing zone at the innermost radius of the media thus eliminating the possibility of destroying or degrading data by landing in the data zone. The WREN 6HH incorporates an automatic shipping look which prevents potential damage to the heads and discs caused by movements during shipping and handling. The shipping lock is automatically disengaged when power is applied to the drive. The WREN 6HH decodes Track 0 location from the dedicated servo surface thereby eliminating mechanical transducer adjustments and related reliability concerns. The WREN 6HH uses a high performance actuator assembly consisting of a low inertia, balanced, patented, straight arm design which provides excellent performance with minimum power dissipation. Media Description ----------------- The media used on the WREN 6HH has a diameter of approximately 5 inches (130 mm). The aluminum substrate is coated with a thin film magnetic material, overcoated with a proprietary protective layer for improved durability and environmental protection. Defect and Error Management --------------------------- WREN 6HH, 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). Defect and error management in the SCSI system involves WREN 6HH internal defect/error management and SCSI systems error considerations (errors in communications between Initiator and WREN 6HH). Tools for use in designing a defect/error management plan are briefly outlined in this section, with references to other sections where further details are given. WREN 6HH Internal Defects/Errors -------------------------------- Identified defects are recorded on the WREN 6HH defects list tracks (referred to as the promary or ETF defect list). It is recommended that these known defects be reallocated during the initial WREN 6HH format operation. The WREN 6HH internal retries and data correction by ECC should be enabled to recover data from additional flaws if they occur. If data correction by ECC is required to recover data, the host should immediately reallocate this sector by use of the Reassign Blocks command. If the WREN 6HH automatic retries and data correction by ECC features are not used, defects are usually un- recoverable and need to be reallocated as they are diacovered. For reallocation of bad sectors, the number of spare sectors per track or cylinder and the number of spare tracks per volume is programmable. After formatting, defects can be automatically reallocated by the WREN 6HH, or can be reallocated when the host sends the Reassign Blocks Command. Seek Time --------- |94241-383|94241-502| ----------------------------------+---------+---------+ Track-to-Track msec. typ. | 3 | 3 | msec. max. | 5 | 5 | Average msec. typ. | 14 | 16 | Average msec. max. | 16 | 18 | Full Stroke msec. typ. | 24 | 33 | msec. max. | 28 | 38 | Latency msec. avg. | 8.33 | 8.33 | ----------------------------------+---------+---------+ Read Look-Ahead/Cache Control ----------------------------- The WREN 6HH Model ST2383N/502N provides a Read Look-ahead multi- segmented cache control algorithm which can in may cases enhance system performance. This feature may be selected by issuing a Mode Select Command with the proper values in the applicable bytes in page 38H. Power Sequencing ---------------- Power sequencing is not required for the WREN 6HH. The WREN 6HH protects against inadvertent writing during power up and down. Daisychain operation requires that power be maintained on the terminated WREN 6HH to ensure proper termination of the peripheral I/O cables. Start/Stop Time --------------- After DC power has been applied, the WREN 6HH will become ready within 20 seconds if the Motor Start Option is disabled. During this time, the drive will respond to the SCSI interface. Stop time will be less than 25 seconds from removal of DC power. If the Motor Start Option is enabled, the internal controller will accept the commands three seconds after DC power has been applied. After the Motor Start Command has been received the WREN 6HH will become ready for normal operations within 18 seconds. During this time the drive will respond to the SCSI interface in accorance with the rules for Command Queing. Temperature ----------- The drive will meet all specifications over a 50*F to 122*F (10*C to 50*C) 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 are not exceeded. A small amount of air flow may be needed to achieve these temperature values. Air Cleanliness --------------- The WREN 6HH is designed to operate in a typical office environment with minimal environmental control. Reliability ----------- The following reliability specifications assume correct host/drive operational interface, including all interface timings, power supply voltages, environmental conditions, and appropriate data handling circuit to the host system. MTBF 100,000 hours Service Life 5 years Preventive Maintenance None required