S T 2 5 1 N - 0 SEAGATE NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 5.25"/HH Cylinders 820| | | Capacity form/unform 43/ 51 MB Heads 4| | | Seek time / track 38.0/ 8.0 ms Sector/track 26| | | Controller SCSI1 SINGLE-ENDED Precompensation Cache/Buffer KB Landing Zone Data transfer rate 0.938 MB/S int Bytes/Sector 512 1.500 MB/S ext ASYNC Recording method RLL 2/7 operating | non-operating -------------+-------------- Supply voltage 5/12 V Temperature *C 10 45 | -40 60 Power: sleep W Humidity % 8 80 | 5 90 standby W Altitude km -0.305 3.050| -0.305 9.140 idle W Shock g 10 | 40 seek W Rotation RPM 3600 read/write 12.0 W Acoustic dBA spin-up W ECC Bit 32 MTBF h 70000 Warranty Month Lift/Lock/Park YES Certificates CSA,FCC,TUV,UL478,VDE ********************************************************************** L A Y O U T ********************************************************************** SEAGATE ST251N/ST277N/ST296N PRODUCT MANUAL 36034-003, REV.D +------------------------------------------------------++-+J2 | || |Parity | || |SCSI ID | |+-+ | +-+ |XX | | | |XX SCSI | +-+ |XX Interface | Resistor +-+ |XX | Terminator | | |XX | Packs +-+ |XX | +-+ |XX | | | |XX | +-+ |XX | | | |XX Power | |XX J3 +------------------------------------------------------+ ********************************************************************** J U M P E R S ********************************************************************** SEAGATE ST251N/277N/296N PRODUCT MANUAL 36034-003, REV.D Jumper setting -------------- J2 SCSI Bus Address --------------------- +-------+------+------+------+------+ |SCSI ID| P | 4 | 2 | 1 | +-------+------+------+------+------+ | 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| +-------+------+------+------+------+ Jumpers are provided on the drive for selecting the SCSI bus address. The microprocessor accesses this information at power-on. The address jumpers are accessed only during the power-on sequence. If the SCSI address is changed, the drive must be powered off and on. Select the desired SCSI ID with Jumpers. J2 Parity Bit Option ---------------------- +-------+------+------+------+------+ |Parity | P | 4 | 2 | 1 | +-------+------+------+------+------+ |Enable |CLOSED| - | - | - | +-------+------+------+------+------+ |Disable|OPEN | - | - | - | +-------+------+------+------+------+ Some systems require parity bit checking. Consult the system confi- guration. The parity bit option jumper is located adjacent to the SCSI adress pins. Install the optional P-Jumper to enable Parity. 50-Pin SCSI Connector Pin Assignments ------------------------------------- Signal Pin No. Signal Pin No. ---------------------------------------- -DB(0) 2 Ground 28 -DB(1) 4 Ground 30 -DB(2) 6 -ATN 32 -DB(3) 8 Ground 34 -DB(4) 10 -BSY 36 -DB(5) 12 -ACK 38 -DB(6) 14 -RST 40 -DB(7) 16 -MSG 42 -DB(P) 18 -SEL 44 Ground 20 -C/D 46 Ground 22 -REQ 48 Ground 24 -I/O 50 Terminator 26 Power Note: All odd pins, except pin-25 are connected to ground. Pin-25 is not connected. J3 DC Power and pin connector assignments ------------------------------------------- +------------+ 1 = + 12 VDC | 1 2 3 4 | 2 = + 12 Volts return +------------+ 3 = + 5 Volts return 4 = + 5 VDC ********************************************************************** I N S T A L L ********************************************************************** SEAGATE ST251N/ST277N/ST296N PRODUCT MANUAL 36034-003, REV.D 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! The drive may be mounted horizontally with the PC board down or on either side. Mounting vertically on either end is a prohibited orien- tation. The drive should not be tilted front or back, in any position, by more than 5*. For optimum performance, the drive should be formatted in the same position as it will be mounted in the host system. The mounting screws must not exceed inside the mounting feet more than 3.2 mm, measured from the outside surface of the foot. Shock and vibrations -------------------- All shock and vibration specifications assume that the drive is moun- ted in an approved orientation with the input levels at the drive mounting screws. Shipping zone ------------- Upon power-down, the read/write heads automatically move to the ship- ping zone. All portions of the Head/slider assembly park inboard of the maximum data cylinder. When power is applied, the heads will recalibrate to Track 0. FCC Verification ---------------- These drives are devices which are intended to be contained solely within a personal computer or similar enclosure and not attached to an external device. As such, they are considered to be subassemblies even when individually marketed to the customer. SCSI Interface -------------- Seagate intelligent drives feature an onboard SCSI-compatible con- troller. This embedded controller performs all of the functions that were previously implemented by the host-supplied controller. With the controller onboard, the diagnostic capabilities of the drive are en- hanced because the controller is able to optimize drive performance and error recovery. The embedded controller supports the SCSI interface as defined in the ANSI X3T9.2/82-2 document. The interface hardware is capable of transferring up to 1.5 Mbytes/sec. using asynchronous data transfer. Devices on the SCSI Interface are daisy-chained together using a common cable. Both ends of the cable are terminated. All signals on the interface are common between devices. SCSI cable ---------- A 50-conductor flat cable or 25-conductor twisted pair cable is required. The maximum cable length is 6 meters (19.7 ft). Each SCSI bus connection may have a 0.1 meter (0.33 ft) maximum stub length. The characteristic impedance for unshielded flat or twisted pair ribbon cable should be 100 10%. A characteristic impedance greater than 90 is preferred for shielded cables. To minimize discontinuities and signal reflections it is desirable to minimize the use of cables of different impedances in the same bus. Connector Requirements ---------------------- The drive connector is a 50-conductor Connector with two rows of 25 male oins on 100 mil centers. The cable connector is a 50-conductor nonshielded connector consist- ing of two row of 25 female contacts on 100 mil centers. Input Noise ----------- Maximum permitted input noise ripple: 100 mV (peak-to-peak) Maximum permitted input noise: 20 MHz. Ripple measured at the host system power supply across an equivalent 8 resistive load on the +12 V line and an equivalent 3 load on the +5 V line. Handling and Static-Discharge Precautions ----------------------------------------- After unpacking, and prior to system integration, the drive may be exposed to potential handling and ESD hazards. It is mandatory that you observe standard static-discharge precautions. A grounded wrist- strap is preferred. Handle the drive by the frame only and always rest the drive on a padded surface until it is mounted in the host system. Disc format ----------- The ST251N-0 and the ST277N-0 disc format is flexible and supports either 512 or 1024 bytes/sector. The ST251N-1, ST277N-1 and ST296N disc format is flexible and sup- ports either 256, 512 or 1024 bytes/sector. Record interleave ----------------- User-specific record interleaves are supported; from 1:1 (records formatted sequentially on the disk) through the number of records per track minus 1. This gives the user the ability to configure the drive for maximum performance within the operating environment. Onboard Drive Diagnostics ------------------------- At power-on the drive will execute a series of diagnostic tests. Any failure will be indicated by a series of LED (front panel) flashes. The first failure will be preserved. The drive is ready to read/write if no error codes are received within 22 seconds. +-------+---------------------------------------------------------+ |Flashes|Failures codes | +-------+---------------------------------------------------------+ | 1 |Microprocessor/Internal Memory Test | +-------+---------------------------------------------------------+ | 2 |Microprocessor ROM Checksum Test | +-------+---------------------------------------------------------+ | 3 |Controller Chip Test | +-------+---------------------------------------------------------+ | 4 |Controller Program RAM Test | +-------+---------------------------------------------------------+ | 5 |Dat Buffer RAM Test | +-------+---------------------------------------------------------+ | 7 |Spindle Speed Test | | | If the drive is unable to reach and maintaine correct | | | spindle speed | +-------+---------------------------------------------------------+ | 4 |Read Record ID Mark | | | If the controller is unable to find and read an ID mark | | | for any record | +-------+---------------------------------------------------------+ | 8 |Read Operating System Microcode From Drive | | | If the controller is unable to read the operating system| | | from the drive | +-------+---------------------------------------------------------+ | 9 |Read Operating System Microcode From Drive | | | If the controller reads the operating system records, | | | but dertermines that they are invalid. | +-------+---------------------------------------------------------+ Offline Self-test Routines -------------------------- This product family supports a self-test routine that Seagate recom- mends for incoming inspection. This test may be run after the unit has successfully passed the power-on diagnostics. To enable the test, short the following pins to ground at the SCSI connector: 2, 12, 16 and 32. The self test has three parts. They will cycle in order until power or a ground jumper is removed, or until ten complete passes. The LED will remain ON during the test and will turn OFF if an error is detected or a jumper is removed. The LED will flash continuously if 10 passes are completed without error. PART ONE: All sectors in the user data area are read starting with logical block zero. PART TWO: This is a butterfly read/seek test. Starting at the center of the user data tracks, the unit will seek outward and inward by in- crements until the limits of the user data tracks are reached. A one track read is performed to verify position. PART THREE: This part performs a write/read compare on all sectors of the diagnostic cylinders using the data pattern 6DBh. The diagnostic cylinders are located at an inner region on each media surface. Any unrecoverable errors will terminate the test and turn off the LED. ********************************************************************** F E A T U R E S ********************************************************************** SEAGATE ST251N/ST277N/ST296N PRODUCT MANUAL 36034-003, REV.D Formating and Defect Management ------------------------------- Media defects are identified and recorded on the disc during the manufacturing process. This defect map is used during formatting and enables the drive to bypass these defects. During the formatting operation, the controller uses sector-slip technique to reassign defective sectors. Sector-slip allows any sector with a defect to be mapped and bypassed. The next contiguous sector is given that sector address. The ST251N/ST277N and ST296N support three variations of the format command: - Format using a combined list of previously defined defects (manufactires's list plus user-defined list) - Format with previously defined list plus additional user- defined defects - Format with manufacturer's list only (removes all user-defined defects) Access Time Definition and Timing --------------------------------- Access time is a true statistical average (at least 5,000 measure- ments) of the time to execute the seek, less overhead. Overhead is measured by issuing a no-motion seek from the highest Logical Block Address (LBA). All measurements assume a block size of 512 bytes, nominal voltages, 25*C ambient temperature and sea level. Track-to-track access time is the average of all possible single- track seeks in both directions. Average access time is measured by executing seek in both directions between random cylinders or Logi- cal Block Addresses (LBA). Full-stroke access time is one-half the time needed to seek from LBA zero to the maximum LBA and back to LBA zero. | |ST251N-1| |ST251N-0|ST277N-1| |ST277N-0|ST296N | ----------------------------------+--------+--------+ Track-to-Track msec. | 8 | 8 | Average msec. typ. | 38 | 28 | Average msec. max. | 40 | 30 | Full-Stroke msec. typ. | 90 | 70 | msec. max. | 95 | 75 | Latency msec. avg. | 8.33 | 8.33 | ----------------------------------+--------+--------+ DC Power Specifications ----------------------- Power may be applied or removed in any sequence without loss of data or damage to the drive. SCSI bus drivers/receivers -------------------------- The drives use open collector drivers. All signals are terminated with 220 to +5 VDC (nominal) and 330 to ground. For these measurements, SCSI bus termination is assumed to be external to the drive. A typical drive is supplied with the resistor termination packs installed. Signals driven by the drive have the following output characteristics, when measured at the drive connector: Signal true: 0.0 VDC to 0.4 VDC Maximum total input load: 48 mAmps (sinking) @ 0.5 VDC Signal false: 2.5 VDC to 5.25 VDC Signals received by the drive have the following input characteristics, when measured at the drive connector: Signal true: 0.0 VDC to 0.8 VDC Maximum total input load: -0.4 mAmps @ 0.4 VDC Signal false: 0.2 VDC to 5.25 VDC Minimum Input Hysteresis: 0.2 VDC UL/CSA Certification -------------------- This product is listed in accordance with UL 478 and CSA C22.2 (0-M1982), and meets all applicable sections of IEC 380 and VDE 0806/ 08.81, as tested by TUV-Rheinland, North America. ********************************************************************** G E N E R A L ********************************************************************** SEAGATE SUPPORT SERVICES Seagate Technology ------------------ Technical Support Services If you need assistance installing your drive, consult your dealer. Dealers are familiar with their unique system configurations and can help you with system conflicts and other technical issues. If you need additional assistance with your Seagate(r) drive or other Seagate products, use one of the Seagate technical support services listed below. SeaFONE at 1-800-SEAGATE (1-800-732-4283) Seagate's 800 number allows toll-free access to automated self-help services, providing answers to commonly asked questions, troubleshooting tips and specifications for disc drives and tape drives. This service is available 24 hours daily and requires a touch-tone phone. If you need to speak to a technical support engineer, dial this number and listen to the options for technical support. (International callers can also reach this automated self-help service by dialing 408-456-4496). Seagate Technology online services Using a modem, you can obtain troubleshooting tips, free utility programs, drive specifications and jumper settings for Seagate's entire product line. You can also download software for installing and analyzing your drive. SeaNET You can obtain technical information on Seagate drives, Seagate software and much more over the Internet from Seagate's World Wide Web home page (http://www.seagate.com) or Seagate's ftp server (ftp://ftp.seagate.com). You may also send E-mail with your questions to DiscSupport@ Seagate.com or TapeSupport@Seagate.com. SeaBOARD SeaBOARD is a computer bulletin board system (BBS) that contains information about Seagate's disc and tape drive products and is available 24 hours daily. Set your communications software to eight data bits, no parity and one stop bit (8-N-1). SeaBOARD phone numbers are listed in the following table. BBS Location Modem number United States Disc: 408-434-1080; Tape: 408-456-4415 England 44-1628-478011 France 33 1-48 25 35 95 Germany 49-89-140-9331 Singapore 65-292-6973 Thailand 662-531-8111 Australia 61-2-9756-2359 Taiwan 886-2-719-6075 Seagate CompuServe forum Online technical support for Seagate products is available on CompuServe. To access our technical support forum, type go seagate. This forum provides information similar to that found on SeaBOARD. In addition, you can type questions or browse through previous questions and answers on the forum messages. Seagate Technology FAX services SeaFAX You can use a touch-tone telephone to access Seagate's automated FAX system to receive technical support information by return FAX. This service is available 24 hours daily. Location Telephone number United States 1-800-SEAGATE or 408-456-4496 England 44-1628-894084 Australia 61-2-9756-5170 Seagate technical support FAX You can FAX questions or comments to technical support specialists 24 hours daily. Responses are sent during business hours. Location FAX number United States 408-944-9120 England 44-1628-890660 France 33 1-46 04 42 50 Germany 49-89-1430-5100 Australia 61-2-9725-4052 Singapore 65-293-4722 Hong Kong 852-2368 7173 Taiwan 886-2-715-2923 Korea 82-2-556-7294/4251 Seagate technical support You can talk to a technical support specialist during business hours Monday through Friday for one-on-one technical help. Before calling, note your system configuration and drive model number (STxxxx). There are several technical support phone numbers available for various Seagate products. Location Telephone number United States Please dial 1-800-SEAGATE for the specific product telephone number. (6:00 A.M. to 11:15 A.M., 12:30 P.M. to 5:00 P.M., Pacific time, M-F) England 44-1628-894083 (10:00 A.M. to 1:00 P.M., 2:00 P.M. to 5:00 P.M., M-F) France 33 1-41 86 10 86 (9:30 A.M. to 12:30 P.M., 2:00 P.M. to 5:00 P.M., M-F) Germany Disc: 49-89-140-9332; (9:30 A.M. to 12:30 P.M., 2:00 P.M. to 4:00 P.M., M-F) Tape: 49-89-140-9333 Australia 61-2-9725-3366 (9:00 A.M. to 5:00 P.M., M-F) Singapore 65-290-3998 (9:00 A.M. to 12:00 P.M., 2:00 P.M. to 5:00 P.M., M-F) Hong Kong 852-2368 9918 Taiwan 886-2-514-2237 Korea 82-2-556-8241 SeaTDD 408-944-9121 Using a telecommunications device for the deaf (TDD), you can send questions or comments 24 hours daily and exchange messages with a technical support specialist between 6:00 A.M. to 11:15 A.M. and 12:30 P.M. to 5:00 P.M. (Pacific time) Monday through Friday. Customer Service Centers Seagate direct OEM, Distribution, System Integrator and Retail customers should contact your Seagate Service Representative for warranty information. Other customers contact your place of purchase. Seagate offers comprehensive customer support for all Seagate drives. Seagate customer service centers are the only facilities authorized to service Seagate drives. These services are available worldwide. Location Telephone number FAX number United States 1-800-468-3472; 405-949-6740 Other Americas (Canada & Brazil) 405-949-6706; 405-949-6738 Mexico 525-546-6965; 525-546-4888 Europe, Middle East & Africa 31-2065-43300; 31-2065-34320 Asia Pacific & Australia 65-485-3595; 65-485-4980 Japan 81-3-5462-2904; 81-3-3462-2979 Seagate, Seagate Technology and the Seagate logo are registered trademarks of Seagate Technology, Inc. SeaFAX, SeaFONE, SeaBOARD, SeaTDD, SeaNET, Medalist and DiscWizard are either trademarks or registered trademarks of Seagate Technology, Inc. or one of its subsidiaries. All other trademarks or registered trademarks are the property of their respective owners.