S T 1 2 5 A - 0 SEAGATE NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 3.5"/HH Cylinders 404| 615| | Capacity form/unform 21/ 25 MB Heads 4| 4| | Seek time / track 40.0/ 8.0 ms Sector/track 26| 17| | Controller IDE / AT Precompensation Cache/Buffer KB Landing Zone Data transfer rate 0.938 MB/S int Bytes/Sector 512 4.000 MB/S ext Recording method RLL 2/7 operating | non-operating -------------+-------------- Supply voltage 5/12 V Temperature *C 10 50 | -40 60 Power: sleep W Humidity % 8 80 | 5 90 standby W Altitude km -0.305 3.048| -0.305 9.144 idle W Shock g 10 | 60 seek W Rotation RPM 3600 read/write 9.0 W Acoustic dBA 40 spin-up W ECC Bit MTBF h 150000 Warranty Month Lift/Lock/Park YES Certificates CSA,FCC,IEC435,TUV,UL478,VDE ********************************************************************** L A Y O U T ********************************************************************** SEAGATE ST125A/138A/157A PRODUCT MANUAL 36045-006, REV.F +---------------------------------------------------------+ | 10-pin version 10--+ | | |J2| | | 6-pin version 6 | | | | | |XX 40 PIN | +--1 |XX C | |XX O | |XX N | |XX N | |XX E | |XX C | |XX T | |XX O | |XX R | |XX1 | | | |XX Power | |XX J3 +---------------------------------------------------------+ 1 ********************************************************************** J U M P E R S ********************************************************************** SEAGATE ST125A/138A/157A PRODUCT MANUAL 36045-006, REV.F Jumper setting -------------- J2 Drive configuration 6-pin version ------------------------------------- +-------------------------------------+-------+ | |2 4 6| | +-------+ | |o o o| | |* o o| +-------------------------------------+-------+ | Single drive |X | | | | | Dual-drive master |X X | | | | | Dual-drive slave | X | | | | | (Optional) Drive Activity Indicator | X| +-------------------------------------+-------+ J2 External LED 6 pin version ------------------------------ pin 5-6 CLOSE External LED option enabled OPEN External LED option disabled J2 Drive configuration 10-pin version -------------------------------------- +-------------------------------------+-------------+ | |2 4 6 8 10| | +-------------+ | |o o o o o| | |* o o o o| +-------------------------------------+-------------+ | Single drive | X | | | | | Dual-drive master | X X | | | | | Dual-drive slave | | | | | | (Optional) Drive Activity Indicator | X| | | | | Reserved position |X X | +-------------------------------------+-------------+ 1-2 and 7-8 reserved positions. Do not use !!! J2 Master/Slave configuration ------------------------------ Configure up to drives on a single AT bus (table below). Drive Type | Master |Slave Present ----------------------+-----------+------------- Only drive in system | Installed |Removed ----------------------+-----------+------------- Drive 1 in a two drive| Installed |Installed system | | ----------------------+-----------+------------- Drive 2 in a two drive| Removed |Removed system | | Up to two drives can be daisy-chained (Master/Slave) on the same host bus. J2 External LED 10 pin version ------------------------------- pin 9-10 CLOSE External LED option enabled OPEN External LED option disabled Remote LED: When pins 9 and 10 on the User Configuration jumper block are shorted drive will indicate activity to the system via a connec- tor on the host adapter or motherboard. J3 DC Power and pin connector assignments ------------------------------------------- +------------+ pin 1 +12 VDC | 1 2 3 4 | pin 2 +12 Volts Return +------------+ pin 3 + 5 Volts Return pin 4 + 5 VDC ********************************************************************** I N S T A L L ********************************************************************** SEAGATE ST125A/138A/157A PRODUCT MANUAL 36110-001/2, REV.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! 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. AT Interface Connector Requirements ----------------------------------- The drive connector is a 40-conductor connector with 2-rows of 20 male pins on 100 mil centers. The mating cable connector is a 40-conductor nonshielded connector with 2-rows of 20 female contacts on 100 mil centers. Translation/Native Mode Selection --------------------------------- The drive(s) will always power-up in their respective default Translation modes. Virtual Emulation ----------------- The drive will support any 17-sector-based disc geometry as long as the number of logical heads is 16, the number of logical cylinders is 1,024 and the resulting number of sectors does not exceed the drive's total guaranteed sector count. 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 20 resistive load on the +12 V line and an equivalent 8 load on the +5 V line. 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 ------------- When the read/write heads are positioned in the shipping zone, all portions of the head/slider assembly park inboard of the maximum data cylinder. The read/write heads automatically move to the shipping zone at power-down. The read/write heads may be parked by issuing a seek command to any cylinder between 614 and 666. When power is applied, the heads will recalibrate to Track 0. If the heads are parked while power is applied, any step pulse will cause the unit to 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. As a subassembly, no Federal Communications Commission authorization, verification or certification of the drive is required. Seagate Technology, Inc. has tested these devices in an enclosure as described above to ensure that the total assembly (enclosure, disk drive, motherboard, power supply, etc.) does comply with the limits for a Class B computing device. Operation with non-certified assem- blies is likely to result in interference to radio and television reception. DC Power specifications ----------------------- Power may be applied or removed in any sequence without loss of data or damage to the drive, except during a write operation. Typical current and power specifications assume nominal voltages applied, 25*C ambient temperature, sea level and spindle rotating. Voltage tolerance (incl. ripple): 5% 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. Shipping -------- When transporting or shipping a drive, a Seagate-approved container MUST BE USED. SHIPPING A DRIVE IN A NON-APPROVED CONTAINER WILL VOID THE DRIVE WARRANTY! Supported System BIOS revisions ------------------------------- The system will report the BIOS type and version number on a cold boot. The ST125A, ST138A and ST157A are AT interface compatible drives. The BIOS manufacturers listed below have indicated that the referenced BIOS revisions are fully compatible with the IBM AT Task File Interface specifications. Earlier BIOS revisions may provide only partial AT support. Compati- bility problems may include repeated drive access errors or system timeout errors. +-------------+-----------------------------------+ | AMI | Dated 4/9/90 or later | +-------------+-----------------------------------+ | Award | Version 3.04 or higher | +-------------+-----------------------------------+ | Quadtel | Single Drive System: Any Version | | | Dual Drive System: 3.04 or higher | +-------------+-----------------------------------+ | Phoenix | BIOS Plus 286: 3.10 or higher | | | BIOS Plus 386: 1.10 or higher | +-------------+-----------------------------------+ | PhoenixBIOS | Version 1.00 or higher | +-------------+-----------------------------------+ CMOS Configuration ------------------ Seagate AT interface drives mimic (translate) other drive geometries. If none of the drive types offered by the CMOS supports the numbers of heads, cylinders and sectors shown by the table, and your system does not support a "user defined" drive type, then select a drive type in your systems CMOS with a capacity which is less than or equal to the capacity of the drive. When specifying drive geometry to the system CMOS, different values may be used for the cylinders, read/write heads and sectors/track than those given below. However, the final drive capacity shown by the CMOS cannot exceed the capacity of the drive. After the drive has been properly configured for the system, and the correct drive type has been specified to the system CMOS, the drive should be low-level formatted. Low Level Formatting -------------------- Seagate AT Interface drives are low-level formatted at the factory and do not require low-level formatting! Partitioning ------------ A drive can be subdivided into "partitions", which behave as indivi- dual drives within the system. Earlier versions of DOS have a limi- tation on maximum drive capacity and consequently require high capa- city drives to be divided into smaller partitions. For DOS users, each partition will be assigned a different letter, i.e., C: and D: for a drive with two partitions. Drive partitioning in DOS is done by using the FDISK utility. After the drive has been configured, defined in CMOS and low-level format- ted (if necessary), the user must boot the system to the floppy drive with a bootable DOS diskette. The user must then run the FDSIK util- ity to partition the drive. Refer to your DOS manual for instruction on using FDISK. Many UNIX based operating systems allow partitioning of the drive for use by DOS applications. In UNIX, drive formatting and partitioning are both done by a single operating system utility. Refer to your system documentation for instructions. High level formatting --------------------- High-level formatting verifies the information written by the low- level format and establishes drive access information used by the operating system. High-level formatting in DOS creates the File Allocation Table used by DOS for all drive access. The high-level format is initiated in DOS by the FORMAT command. High-level formatting in UNIX creates the I-NODE used by the system for file access information. In UNIX, drive formatting and partitio- ning are both done by a single operating system utility. ********************************************************************** F E A T U R E S ********************************************************************** SEAGATE ST125A/138A/157A PRODUCT MANUAL 36045-006, REV.F Media Defects ------------- A media defect is a read error when the data, which has been correctly written, cannot be recovered within 16 retries. A label is fixed to the drive listing the location of any media defects by cylinder, head and bytes from index. For MFM encoding, this is based on 1.6 sec./byte. AT interfaces drives have the controller onboard. This allows bad sectors to mapped out; thereby transparent to the user. Seagate specifies gurabteed megabytes for ST157 family AT interface drives. AT Interface ------------ This drive family uses the industry-standard IBM AT task file interface. It support both 8 and 16-bit data transfer and has no DMA capability. All data transfers are done via programmed I/O. AT Interface Connecter Pin Assignments -------------------------------------- pin signal I/O | pin signal I/O ---------------------------+-------------------------- 01 /Host Reset O | 21 Reserved O 02 Ground | 22 Ground 03 Host Data 7 I/O | 23 /HIOW O 04 Host Data 8 I/O | 24 Ground 05 Host Data 6 I/O | 25 /HIOR O 06 Host Data 9 I/O | 26 Ground 07 Host Data 5 I/O | 27 Reserved 08 Host Data 10 I/O | 28 Host ALE O 09 Host Data 4 I/O | 29 Reserved 10 Host Data 11 I/O | 30 Ground 11 Host Data 3 I/O | 31 IRQ14 I 12 Host Data 12 I/O | 32 Host IO16 I 13 Host Data 2 I/O | 33 Host ADDR 1 O 14 Host Data 13 I/O | 34 /PDIAG Notes 15 Host Data 1 I/O | 35 Host ADDR 0 O 16 Host Data 14 I/O | 36 Host ADDR 2 O 17 Host Data 0 I/O | 37 /Host CSO O 18 Host Data 15 I/O | 38 /Host CS1 O 19 Ground | 39 /Host SLV/ACT Notes 20 Key | 40 Ground Notes: * /Indicates active low signal * Direction is with respect to the host * I indicates to the host, O indicates from the host * Reserved pins/ground do not have direction * /PDIAG and HOST/SLAVE are used for communication between Master and Slave drive * Pin-1 is referenced in LAYOUT. It may also be located by the square solder pad on the PC board. AT Bus Signal Levels -------------------- Signal driven by the drive must have the following output character- istics at the drive connector: Logic Low: 0 to 0.4 VDC Logic High: 2.5 to 5.25 VDC Signal received by the drive must have the following input character- istics, measured at the drive connector: Logic Low: 0 to 0.8 VDC Logic High: 2.0 to 5.25 VDC Seek Time Definition and Timing ------------------------------- Seek time is a true statistical average (at least 5,000 measure- ments) of the time to execute the seek, less overhead. All measurements assume a block size of 512 bytes, nominal voltages, 25*C ambient temperature and sea level. Track-to-track seek time is the average of all possible single- track seeks in both directions. Average seek time is measured by executing seek in both directions between random cylinders or Logi- cal Block Addresses (LBA). Full-stroke seek time is one-half the time needed to seek from LBA zero to the maximum LBA and back to LBA zero. | ST1**A | ----------------------------------+--------+ Track-to-Track msec. typ. | 8 | msec. max | 10 | Average msec. typ. | 28 | Average msec. max. | 30 | Full-Stroke msec. typ. | 70 | msec. max. | 75 | Latency msec. avg. | 8.33 | ----------------------------------+--------+ DC Power Specifications ----------------------- Power may be applied or removed in any sequence without loss of data or damage to the drive. Bit Jitter ---------- Bit jitter reduction determines the relationship between the leading edge of read data and the center of the data window. The specified read error rates are based on the following bit jitter specifications: the data separator must provide at least -40dB of bit jitter reduction at 2F with an offset of less than 1.5 nsec. shift from the center of the data window. UL/CSA Listing -------------- The St157 drive family is listed in accordance with UL 478 and CSA C22.2 (0-M1982), and meets all applicable sections if 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.