W R E N V I H H 9 4 2 4 4 - 2 7 4 CDC NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 5.25"/HH Cylinders 1747| 536| 873| Capacity form/unform 242/ 273 MB Heads 5| 16| 15| Seek time / track 16.0/ 3.0 ms Sector/track 54| 55| 36| Controller IDE / AT Precompensation Cache/Buffer 32 KB LOOK-AHEAD Landing Zone Data transfer rate 1.549 MB/S int Bytes/Sector 512 5.000 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 15.0 W Shock g 10 | 40 seek 20.0 W Rotation RPM 3592 read/write W Acoustic dBA spin-up W ECC Bit MTBF h 100000 Warranty Month Lift/Lock/Park YES Certificates CSA,IEC380,IEC435,UL478,VDE ********************************************************************** L A Y O U T ********************************************************************** SEAGATE ST2274A/ST2383A PRODUT MANUAL 77765393-C +--------------------------------------------------------+ 1 | |XX Power | |XX | | | |+-1 | || |J2 | || | | |+-+ | | | |XX | |XX 40 pin | |XX I/O | |.X | |XX | |XX | |XX | |XX1 +--------------------------------------------------------+ ********************************************************************** J U M P E R S ********************************************************************** SEAGATE ST2274A/ST2383A PRODUCT MANUAL 77765393-C Jumper setting ============== x = Jumpers set at factory J2 Drive Select ----------------- +--------------------1--+ | G F E D C B A | -----+-----------------------+----- PWA 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. Connections to external devices (switches, connectors, etc.) could adversely affect drive performance. Exact location of these pins and headers may change without notice. JUMPERS FUNCTION -------------------------------------------------------------------- A B ------------- OFF OFF Factory use only. OFF ON Drive is slave, motor start delays 12 sec. from master start-up. ON OFF Drive is slave, no motor start delay ON ON Drive is master. Motor starts at application of DC power. When it is necessary to remove jumpers for desired configuration, do not store the removed jumper plugs on any other pins of the configuration selection header, as that will cause the drive to oper- ate incorrectly. C D ------------- OFF OFF Physical mode. OFF ON Translate (logical) mode, sparing scheme is one sector per track. ON OFF Translate (logical) mode. No sparing space allocated. ON ON Factory use only. The WREN 6HH (AT interface) operates in either a translate or a non-translate mode. To operate in the translate mode, a Translate Mode jumper configuration must be installed on the configuration select header, and the host must set up in the drive the logical characteristics of the drive when communication with the host. E -- OFF Slave present. Only meaningful on master. ON No slave present. F & G ------------- Factory Test. Jumper position F and G must not be used. Position G may or may not be present depending upon PWA. DC Power Connector ------------------ +-4----3-----2-----1--+ |+5V +5V +12V +12V | | Ret Ret | +---------------------+ ********************************************************************** I N S T A L L ********************************************************************** SEAGATE ST2274A/ST2383A PRODUCT MANUAL 77765393-C 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! Never install PC board on the Top! Drive Orientation ----------------- Only two WREN 6HH mounting orientations are permitted: discs in the horizontal plane and discs in the vertical plane. Horizontal mounting with the front raised at an angle of 15* 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 by read in that same orientation. WREN 6HH (AT interface) is designed, manufactured, and tested with a "Plug-in and Play" installation philosophy. Basically, this philosophy minimizes the requirements for highly trained personnel to integrate the WREN 6HH (At interface) into an OEM's system, wether in a factory or field environment. Cooling ------- Cabinet cooling must be designed by the customer so that the ambient temperature immediately surrounding the WREN 6HH (AT interface) will not exceed temperature conditions. Specific consideration should be given to make sure adequate air circulation is present around the components on the PWAs. Service Tools ------------- No special tools are required for site installation or recommended for site maintenance. The depot repair philosophy of WREN 6HH (AT interface) precludes the necessity for special tools. Should field repair of items external to the HDA be desired, one 6 point size T10 Torx driver is required. This hand tool may be ordererd through most commercial tool catalogs. Air Cleanliness --------------- The WREN 6HH (AT interface) is designed to operate in a typical office environment with minimal environment control. Interface Cabling Options ------------------------- The ST2274A/383A is capable of operating on the AT bus in a daisy chained configuration with a second drive/controller that operates in accordance with these specification. One drive is designated as master and the other as the slave. +-----------------------------------------+ | HOST | | I/O | +---------+-------------------------------+ | | +----------------+ +---------+--+ +----------+--+ | 'AT' | | 'AT' | | WREN | | WREN | +------------+ +-------------+ DC Cable and Connector ---------------------- The WREN 6HH (AT interface) receives DC power through a 4 pin connector mounted on the main circuit board. Recommended part numbers for the mating connector are included below, but equivalent parts may be used. Type of cable: 18 AWG Connector: AMP 1-480424-0 Contacts: AMP 60619-4 (Loose Piece); AMP 61117-4 (Strip) I/O Cable and Connector ----------------------- The I/O connector is a 40 pin connector. A key is provided by the re- moval of Pin 20. The corresponding pin on the cable connector should be plugged. Seagate recommends keying this connector to prevent the possibility of installing it upside down. Maximum I/O cable length is 24 inches (.61 metres). Recommended part numbers for the mating connector are included below, but equivalent parts may be used. Connector: 40 pin, 3M-3417-7000 (Strain relief 3448-2040) Cable: Flat Cable (Stranded AWG 28) 3M-3365-40 Flat Cable (Stranded AWG 28) 3M-3517-40 (Shielded Cable) ********************************************************************** F E A T U R E S ********************************************************************** SEAGATE ST2274A/ST2383A PRODUCT MANUAL 77765393-C General Description ------------------- The WREN 6HH (AT interface) is a half height 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 (AT interface) has been developed as a system peripherals to the highest standards of design and construction. The WREN 6HH (AT interface) 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 (AT interface) 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 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 maintenance of a contamination free disc/ actuator environment. The WREN 6HH (AT interface) 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. Head parking is done automatically by the WREN 6HH. The Host can not send a command that sends the heads to the parking zone. The WREN 6HH (AT interface) 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 (AT interface) decodes Track 0 location from the dedicated servo surface thereby eliminating mechanical transducer adjustments and related reliability concerns. The WREN 6HH (AT interface) uses a high performance actuator assembly consisting of a low inertia, balanced, patented, straight arm driven by a highly efficient pancake coil assembly. This patended actuator mechanism provides excellent performance with minimal power dissipa- tion. Media Description ----------------- The media used on the WREN 6HH (AT interface) 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. Each data surface has a total of 1747 tracks and is capable of recording 54,716,040 bytes of unformatted data. Media defects are characterized as correctable or uncorrectable de- pending on the type and magnitude of the media flaw. WREN 6HH (AT interface) media certification is performed using the following standards: An error burst of 11 bits or less is a correctable error. An error burst greater than 11 bits in length is an un- correctable error. At the time of shipment from the point of manufacture, the WREN 6HH (AT interface) recording surfaces meet the following requirements. 1. 1747 total tracks per surface. 2. Tracks 0 to be error free on each data surface. 3. 50 defects per surface maximum. 4. Accumulative defects not to exceed one per megabyte, based on total available unformatted drive capacity. Defect Deallocation and Factory Defect Maps ------------------------------------------- Media verification is performed during the factory burn-in period. Standard configurations, as shipped from the factory, have all physical sectors containing defects reformatted with the bad block bit set. The scetors are also relocated so that sector 54 falls over the defect and will be undetected if the alternate (spare) sector mode is jumper selected. A map of the defective sectors is written to several locations on the drive using physical addresses. The host can configure the drive to a logical configuration when installed in the host system. If there are multiple defective sectors on a track, the entire track will be formatted with Bad block bits set. The physical addresses of the defects are written to all heads, sector 1 through 4 on physical cylinder address 1023, 1746 and 4095 (-1) of the drive. The copies of the defect map use the following format: Each entry is a four byte hexadecimal number. The first two bytes are the cylinder number with the least significant byte first. The third byte is the head number, and the fourth byte is the sector number. All drives are shipped with cylinder zero defect-free. An entry of a cylinder number of zero indicates the end of the defect map. The last 19 bytes of sector four contain in ASII "PHYSICAL *DEFECT* MAP". Translate Mode Capacity (logical, apparent values) -------------------------------------------------- The ST2274A/383A WREN 6HH has an embedded controller that has the capability to translate the drive's actual, physical heads and cylinders values to logical, apparent values when communicating with a host controller. Thusa host system not having a disc drive table entry that fits the ST2274A/383A WREN 6HH can install the ST2274A/ ST2383A WREN 6HH as a drive having a heads and cylinders to whatever they need to appear to be install on the host system as the selected type. The capacity achieved in the translate mode depends on the logical configuration to which the WREN 6HH "translates". Seek Time --------- |WREN 6HH| ----------------------------------+--------+ Track-to-Track msec. typ. | 3 | msec. max. | 5 | Average msec. typ. | 16 | Average msec. max. | 18 | Latency msec. avg. | 8.35 | ----------------------------------+--------+ Seek time is defined as the required time from the receipt of a Seek Command by the WREN 6HH (AT interface) until the completion of the seek operation. Average seek time is determined by dividing the sum of the time for all possible seek movements by the total number of seek movements. Spindle Speed and Latency ------------------------- The spindle speed is 3592 0.5% r/min. The speed tolerance includes motor performance and motor control circuit tolerances. The average latency time is 8.35 milliseconds, based on a nominal disc speed of 3592 r/min. The maximum latency time is 16.7 milli- seconds based on a minimum disc speed of 3574 r/min. Host/Drive Interface data transfer rate --------------------------------------- Maximum instantaneous: 5,000 kbytes/s Maximum average: 1,549 kbytes/s Power Sequencing ---------------- Power sequencing is not required for the WREN 6HH. If the Delayed Motor Start jumper configuration is off, the slave drive motor start- up is delayed 20 seconds from power on. 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. Write Precompensation Cylinder ------------------------------ The starting cylinder for write precompensation is controlled by the contens of this register. The starting physical cylinder is 4 times value in this register. This register is ignored by the WREN 6HH 'AT'. Use of write precompensation is controlled by the drive. Reliability ----------- The following reliability specifications assume correct host/drive operational interface has been implemented, 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