W R E N I I I H H 9 4 2 1 1 - 1 0 6 CDC NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 5.25"/HH Cylinders 1022| | | Capacity form/unform 91/ 106 MB Heads 5| | | Seek time / track 18.0/ 4.0 ms Sector/track 36| | | Controller SCSI1 SINGLE-ENDED Precompensation Cache/Buffer 8 KB Landing Zone Data transfer rate 1.250 MB/S int Bytes/Sector 512 MB/S ext Recording method RLL 2/7 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 18.0 W Shock g 2 | 32 seek 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,SDA,FCC,IEC380,IEC435,... ********************************************************************** L A Y O U T ********************************************************************** SEAGATE ST2106N PRODUCT MANUAL 77765250-H +---------------------------------------------------------+ | Terminator +--------+ |XX J1 | Connector | (3) | |XX Power | Mount PWA +--------+ |xx | (Visable from bottom) |+-+ | || |J2 | |+-+ | |++ | |||J3 | ||| | |++ | |1X Inter- | |XX face | |XX J4 | |XX | |XX | |XX +---------------------------------------------------------+ ********************************************************************** J U M P E R S ********************************************************************** SEAGATE ST2106N PRODUCT MANUAL 77765250-H Jumper setting ============== J2 SCSI ID/Parity Check ----------------------- +------------+ | o o o o | | o o o o | +------------+ 4 2 1 P(2) +------------+----------+ | | 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 Parity checking by the WREN 3HH is enabled. J3 Terminator Power/Test Seek ----------------------------- Position A +--------------------------------------+ (3)| o o xxxxxxx o o o o | +--------------------------------------+ J4-26 TP +5V TST GRD M Position B +--------------------------------------+ (3)| o xxxxxxx o o o o o | +--------------------------------------+ J4-26 TP +5V TST GRD M Position C (DO NOT USE) +--------------------------------------+ (3)| xxxxxxx o o o o o o | +--------------------------------------+ J4-26 TP +5V TST GRD M (3) Jumper in position A means terminator power (+5V) for the internal terminators is from the WREN 3HH power connector. Jumper in position B means terminator power is taken from the interface cable, pin 26. If the I/O cable is removed with jumper in position B and with terminators in, drive will not power up. Do not use position C. If unit is not to be terminated, remove the terminator resistor packs. Removal of terminator power source select jumper does not disconnect the terminator resistor from the circuit. Motor Start Option +--------------------------------------+ (4)| o o o o o o xxxxxx | +--------------------------------------+ J4-26 TP +5V TST GRD M (4) CLOSED Enable 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 starts as soon as DC power is applied to the unit. Test Seek Jumper +--------------------------------------+ (5)| o o o o o xxxxxxx o | +--------------------------------------+ J4-26 TP +5V TST GRD M (5) With the jumper in this position the unit will continuously perform test seeks to random cylinders. Motor starts as soon as DC power is applied. DC Power and pin connector assignments -------------------------------------- +------------+ pin 1 +12 V | 1 2 3 4 | pin 2 +12 Volts Return +------------+ pin 3 + 5 Volts Return pin 4 + 5 V 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. 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 ST2106N PRODUCT MANUAL 77765250-H Notes on installation ===================== Drive mounting -------------- horizontally vertically +-----------------+ +--+ +--+ +------------------+ | | | +-----+ +-----+ | | | x | | | | | | | | x+----------------+x +-+-----------------+-+ | | | | | | ||x x|| +---------------------+ | | | | | | || x x || | | | | | | || x x || x x | | | | | | || x x || +------x------x-------+ | +-----+ +-----+ | || xx || +-+------x--x-------+-+ +--+ +--+ || x x || | xx | || x x || | x x | || x x || +---x--------x----+ |x x| x x x++----------------++x UNACCEPTABLE! UNACCEPTABLE! Drive Orientation ----------------- Only two WREN 3HH mounting orientations are permitted: discs in the horizontal plane and discs in the vertical plane. Horizontal mounting with the front (non I/O cable end) raised as much as 15* above the horizontal is acceptable. Mounting with either end down (front or rear) or upside down is not permissible. It is recommended that data written in a given orientation be read in that same orientation. WREN 3HH 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 3HH into an OEM's system, wether in a factory or field environment. Mounting Holes -------------- Mounting Holes (6-32 UNC-28). 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 3HH will not exceed temperature conditions. Specific consideration should be given to make sure adequate air circulation is present around the PWAs at the rear of the drive. Service Tools ------------- No special tools are required for site installation or recommended site maintenance. The depot repair philiosophy of WREN 3HH precludes the necessity for special tools. If field repair of items external to the HDA is desired, two sizes of 6 point Torx drivers are required (T10 and T15). They may be purchased through most commercial tool catalogs. Physical Description -------------------- Model 94211 WREN may be daisychained together or with other compatible SCSI devices using a common cable. Both ends of the cable must be terminated. The WREN 3HH 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 94211 WREN 3HH may be daisychained only with SCSI devices with single ended drivers and recovers. 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. 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 non-shielded 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-3425-7600 W/O Strain Relief, with Center Key (for cable 3M-3425-7650 With Strain Relief, with Center Key ends) Dupont-66900-290 With Strain Relief, with Center Key Open end 3M-3425-6600 W/O Strain Relief, with Center Key (In Daisy- 3M-3425-6650 With Strain Relief, with Center Key chain) Dupont-66900-250 With Strain Relief, with Center Key The Model 94211 WREN 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 end type (in-line application) Connector used. T indicates termination required. Total interface cable length must not exceed 6.0m (20 feet) DC Cable and Connector ---------------------- The WREN 3 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 94211 WREN 3HH 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 3HH. Single Ended Drivers/Receivers ------------------------------ Single ended drivers and receivers are used by the WREN 3HH. Transmitter Characteristics --------------------------- The WREN 3HH 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 3HH uses a ANSI SCSI single ended receiver with hysteresis gate or equivalent as a line receiver. Terminator Requirements ----------------------- Internal WREN 3HH I/O termination consist of three resistor modules which plug into sockets on the underside of the Main PWA. The WREN 3HH may be ordered with or without these termination resistors to facilitate a particular application. All single initiator/single target (nondaisychain) applications require that the Initiator and WREN 3HH 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. Physically remove terminator resistor packs where terminators are not required. Removal of power source selection jumper does not disconnect the terminator resistors 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 resistor modules which are installed on the Main PWA via sockets. The user may install or remove these. Terminator Power ---------------- The WREN 3HH does not supply Terminator power for the SCSI bus. The WREN 3HH may be optionally configured to accept terminator power via Pin 26 of the SCSI bus or to provide terminator power for optional internal termination resistors via the WREN 3HH power connector. AC/DC Ground Separation ----------------------- The 94211 WREN 3HH is provided with the AC groung (chassis) tied to DC logic ground. An option is provided for the user to isolate the AC and DC grounds. This option may be beneficial in reducing ground induced noise in some system applications. ********************************************************************** F E A T U R E S ********************************************************************** SEAGATE ST2106N PRODUCT MANUAL 77765250-H General Description ------------------- The WREN 3HH 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. The WREN 3HH has 8K byte data buffer (32K optional). Selectable data block sizes from 256 to 2048 bytes in one byte increments. Standards --------- The WREN 3HH has been developed as a system peripherals to the highest standards of design and construction. The WREN 3HH 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 3HH complies with Seagate standards. The WREN 3HH 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 IEC435/VDE 0805/11.84 and EN 60950/09.87. The WREN 3HH as delivered, is designed for system integration before use. It is supplied as a Class A Computing Device per the FCC Rules and the Regulations, Part 15, Subpart J governing EMI of computing devices and the Radio Interference Regulations of the Canadian Department of Communications. The Head/Disc/Actuator Assembly (HDA) is environmentally sealed at the factory. Air is recirculated within the HDA through a nonreplace- able filter to maintain a contamination free disc/actuator environment. The WREN 3HH 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 3HH 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 3HH decodes Track 0 location from the dedicated servo surface thereby eliminating mechanical transducer adjustments and related reliability concerns. The WREN 3HH 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 3HH 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 3HH, 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 3HH internal defect/error management and SCSI systems error considerations (errors in communications between Initiator and WREN 3HH). 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 3HH Internal Defects/Errors -------------------------------- Identified defects are recorded on the WREN 3HH 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 3HH format operation. The WREN 3HH 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 3HH automatic retries and data correction by ECC features are not used, defects are usually un- recoverable and need to be reallocated as they are discovered. Seek Time --------- Not Including Controller Overhead | WREN 3 | ----------------------------------+---------+ Track-to-Track msec. typ. | 4 | msec. max. | 6 | ----------------------------------+---------+ Average msec. typ. | 18 | Average msec. max. | 20 | ----------------------------------+---------+ Full Stroke msec. typ. | 35 | msec. max. | 40 | ----------------------------------+---------+ Latency msec. avg. | 8.33 | ----------------------------------+---------+ Including Controller Overhead | WREN 3 | ----------------------------------+---------+ Track-to-Track msec. typ. | 6 | msec. max. | 9 | Average msec. typ. | 20 | Average msec. max. | 23 | Full Stroke msec. typ. | 37 | msec. max. | 43 | Latency msec. avg. | 8.33 | ----------------------------------+---------+ Power Sequencing ---------------- Power sequencing is not required for the WREN 3HH. The WREN 3HH protects against inadvertent writing during power up and down. Daisychain operation requires that power be maintained on the terminated WREN 3HH to ensure proper termination of the peripheral I/O cables. Start/Stop Time --------------- After DC power has been applied to the WREN 3HH the Unit will become ready within 30 seconds if the Motor Start Option is disabled. During this time, the internal controller will not respond to the SCSI interface until the drive has loaded the heads and positioned them to track zero. Stop time will be less than 30 seconds from removal of DC power. If the Motor Start Option is enabled, the internal controller will respond to the SCSI interface 3 seconds after DC power has been applied to the unit. After the Motor Start Command has been received the Unit will become ready for normal operations within 28 seconds. There is no power control switch on the drive. Temperature ----------- 50* to 122* F (10* to 50* C) operating ambient with a maximum gradient of 18* F (10* C) per hour. Above 1000 feet (305 metres) altitude the maximum temperature is derated linearly to 112*F (44.4*C) at 10,000 feet (3048 metres). Cabinet packaging designs must provide ample air circulation around the WREN 3HH to ensure environmental limits are not exceeded as a result of heat transfer from other system components. Operating Ambient for specification purposes is defined as the environment immediately surrounding the WREN 3HH. The temperature of the HDA is restricted to a maximum of 142*F (61.4* C) during operation. Air Cleanliness --------------- The WREN 3HH 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, and environmental requirements. MTBF 100,000 hours Service Life 5 years Preventive Maintenance None required