W R E N V I I F H 9 4 6 0 1 - 1 2 M CDC NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 5.25"/FH Cylinders 1931| | | Capacity form/unform 1050/ 1201 MB Heads 15| | | Seek time / track 15.0/ 2.5 ms Sector/track | | | Controller SCSI2 DIFFERENTIAL Precompensation Cache/Buffer 256 KB Landing Zone Data transfer rate 2.875 MB/S int Bytes/Sector 512 4.800 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 25.0 W Shock g 2 | 32 seek W Rotation RPM 3600 read/write W Acoustic dBA spin-up W ECC Bit 48 MTBF h 150000 Warranty Month Lift/Lock/Park YES Certificates CSA,FCC,IEC950,SDA,UL1950,VDE ********************************************************************** L A Y O U T ********************************************************************** SEAGATE ST41200N/ND PRODUCT MANUAL 77765374-D (1/92) +---------------------------------------------------------+ | +-+ |+-1 | | | J6 || |J4 | +-+ |+-+ | ++ |XX | || |XX | || |XX | Terminator +1 |XX J3 | resistor ++ |XX SCSI | (SIPs) || |XX I/O | || |XX | +1 |XX | ++ |XX | || |XX | || |X1 | +1 | | +-+J7 |XX Power | +-+ LED |XX +---------------------------------------------------------+ 1 ********************************************************************** J U M P E R S ********************************************************************** SEAGATE ST41200N/ND PRODUCT MANUAL 77765374-D (1/92) Jumper setting ============== J4 SCSI ID/Option Select Header -------------------------------- +------------------------+ | o o o o o o o o | | 1 o o o o o o o | +------------------------+ TP TP 4 2 1 (2) (3) (6) (4) +------------+----------+ | | 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 see Note (6) below for description of delayed motor start feature. (3) CLOSED Parity checking by the WREN 7 is enabled. (4) If the unit is not be terminated, remove terminator resistor module SIPs. TP Jumper in left vertical position means terminator power (+5V) is from WREN 7 power connector. Jumper in horizontal position means terminator power is taken from interface cable. Jumper in right TP position means +5V is supplied to the interface cable pin 26. Jumpers can be in both vertical positions at same time. If the drive is not terminated, the TP jumper need not be installed. (6) 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. J6 Write Protect/Remote LED Header ----------------------------------- +------- GND Pin 1 (+5V) +----+----+ Pin 2 LED ON/OFF signal | 2 o x +---- Reserved | 1 o x +---- Reserved +----+----+ +------- Write Protect The Write Protect/Remote LED Header is a 6-pin, 3 jumper (or connector) position header behind the front panel at the right side of the drive, opposite the LED. The pins are on 0.100 inch (2.54 mm) centers both vertically and side to side. A suggested mating two pin connector is the DuPont Mini Latch housing P/N 65291-008 or equivalent. The drive front panel must not be present in order to access the header. For a remote LED capability, plug the remote LED cable connector vertically to the leftmost two pins of the header. The center two pins provide a drive write protect capability. A shorting jumper plug may be plugged vertically onto these two pins to write protect the drive or a two-pin cable connector may be plugged there to connect the two pins to a remote Write Protect switch. The rigthmost two pins are RESERVED for factory use only. 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 ST41200N/ND PRODUCT MANUAL 77765374-D (1/92) Notes on installation ===================== Drive Orientation ----------------- The balanced rotary arm actuator design of the WREN 7 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. The WREN 7 is designed, manufactured, and tested with a "Plug-in and Play" installation philosophy. This philosophy minimizes the requirements for highly trained personnel to integrate the WREN 7 into the OEM's system, wether in a factory or field environment. Mounting Holes -------------- Four on bottom. Two on each side. 6-32-INC. max. screw length into side of chassis 3.17 mm (0.125 in). Max. screw length into bottom of chassis is 3.17 mm (0.125 in). Cooling ------- Cabinet cooling must be designed by the customer so that the ambient temperature immediately surrounding the WREN 7 will not exceed temperature conditions. Specific consideration should be given to make sure adequate air circulation is present around the PWAs. Service Tools ------------- No special tools are required for site installation or recommended for site maintenance. The depot repair philosophy of the WREN 7 precludes the necessity for special tools. Field repair of the drive is not practical since there are no user purchasable parts in the drive. Air Cleanliness --------------- The WREN 7 is designed to operate in a typical office environment with minimal environment control. Drive Termination ----------------- This option may be incorporated during manufacture at the request of the customer. For single ended interface drives, termination consists of three 220/330 ohm resistor modules (SIPs) which are installed on the Main PWA via sockets. Power Sequencing ---------------- Power sequencing is not required for the WREN 7. The WREN 7 protects against inadvertent writing during power up and down. Daisychain operation requires that power be maintained on the terminated WREN 7 to ensure proper termination of the peripheral I/O cables. ********************************************************************** F E A T U R E S ********************************************************************** SEAGATE ST41200N/ND PRODUCT MANUAL 77765374-D (1/92) Standards --------- The ST41200N/ND has been developed as a system peripherals to the highest standards of design and construction. The ST41200N/ND 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 ST41200N/ND is a UL Recognized component per UL478 or UL1950,CSA C22.2, No. 220-M1986 or CAN/CSA-C22.2 No. 950-M89, DIN VDE 0805/08.90 and EN60950:1988 (IEC 950). The ST41200N/ND, as delivered, is designed for system integration before use. It is supplied as a component or subassembly as defined in the FCC Rules and Regulations, Part 15, Subpart J governing EMI of computing devices end the Radio Interference Regulations of the Canadian Department of Communications. The ST41200N/ND is, therefore, not directly subject to the FCC rules and regulations or the Radio Interference Regulations of the Canadian Department of Communications. The head, disc and actuator chamber (HDA) is environmentally sealed at the factory. Air is recirculated within the HDA and passes through a nonreplaceable filter to ensure the maintenance of a contamination free disc/actuator environment. The WREN 7 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 drive automatically disengaged when power is applied to the drive. The WREN 7 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 7 decode Track 0 location from the dedicated servo surface thereby eliminating mechanical transducer adjustments and related reliability concerns. The WREN 7 use 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 in the WREN 7 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 --------------------------- The WREN 7, 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 the WREN 7 internal defect/error management and SCSI systems error considerations (error in communications between host and WREN 7). 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 7 Internal Defect/Errors ----------------------------- Identified defects are recorded on the WREN 7 defects list tracks (referred to as the primary or ETF defect list). These known defects are reallocated during the initial WREN 7 format operation at the factory. The WREN 7 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 7 automatic retries and data correction by ECC are disabled, defects are usally unrecoverable and need to be reallocated as they are discovered. 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 7, or can be reallocated when the host sends the Reassign Blocks Command. Seek Time --------- ----------------------------------+--------+ Track-to-Track msec. typ. | 2.5 | msec. max. | 4.0 | Average msec. typ. | 15 | Average msec. max. | 16.5 | Maximum Seek Time msec. typ. | 34 | msec. max. | 37 | Latency msec. avg. | 8.33 | ----------------------------------+--------+ Including Controller Overhead ----------------------------- ----------------------------------+--------+ Track-to-Track msec. typ. | 3.20 | msec. max. | 4.75 | Average msec. typ. | 15.75 | Average msec. max. | 17.30 | Maximum Seek Time msec. typ. | 34.85 | msec. max. | 37.90 | Latency msec. avg. | 8.33 | ----------------------------------+--------+ Temperature ----------- The drive will meet all specifications over a 50*F to 122*F (10*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 are not exceeded. Air flow may be needed to achieve these temperature values. Operation at case temperatures above these values may adversely affect the drives ability to meet specification. Heat/Power Dissipation ---------------------- For drives with single ended interface circuits, typical dissipation is 31 watts (106 BTUs per hour) of DC power average at nominal voltages. Typical power dissipation under idle conditions is 24 watts (82 BTUs per hour). For drives having differential interface circuits, typical power dissipation is 32 watts (109.2 BTUs per hour) of DC power average at nominal voltages. Typical power dissipation under idle conditions is 25 watts (85.3 BTUs per hour). Reliability ----------- The following reliability specifications assume correct host/drive interface including all interface timings, power supply voltages, environmental requirements. MTBF 100,000 hours Service Life 5 years Preventive Maintenance None required