S T 1 3 8 R - 1 SEAGATE NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 3.5"/HH Cylinders 615| | | Capacity form/unform 33/ 38 MB Heads 4| | | Seek time / track 28.0/ 8.0 ms Sector/track 26| | | Controller RLL / ST412 Precompensation 65535 Cache/Buffer KB Landing Zone Data transfer rate 0.938 MB/S int Bytes/Sector 512 0.938 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 3.050| -0.305 9.140 idle W Shock g 10 | 60 seek W Rotation RPM 3600 read/write 8.0 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 ST124/125/138/138R/157R PRODUCT MANUAL 36045-006, REV.F +-----------------------------------------------------+ | 1+-+ |XX DATA | +------------------ | |J7 |XX Connector | | Configuration| | |XX 20-pin | alternate | Jumper block +-+ |XX J2 | Position 1-------+ +-+ | | of J7 +-------+ Termination| | |XX | Resistor | | |XX | Pack +-+1 |XX | |XX | |XX Connector | |XX 34-pin | |XX J1 | |XX | | | |XX | |XX Power J3 +-----------------------------------------------------+ Alternate Location On Drive PC Board of the User Configuration Jumper. Note position of Pin 1 on both configurations. Jumper blocks in either position are identical in function. ********************************************************************** J U M P E R S ********************************************************************** SEAGATE ST125/ST138/ST138R/ST157R PRODUCT MANUAL 36045-006, REV.F Jumper setting -------------- J7 Radial/Daisy-Chain Mode ---------------------------- 1- 2 CLOSED Radial mode 1- 2 OPEN Daisy-Chain mode This drive can be configured in either Radial or Daisy-Chain mode. Radially-selected drives are allways selected. The Radial option is enabled by shorting pins 1-2 at the User Configuration block. The resistor termination pack must remain installed on any radially- selected drive. In a Daisy-Chain, the last drive on the chain must have the resistor pack installed. NOTE: Termination resistors on the ST124 are NOT REMOVABLE! J7 Not used ------------- 3- 4 OPEN Not used J7 Write Fault Latch ---------------------- Write Fault is indicated by a latched signal on the interface. It can be cleared by deselecting the drive or with a power-off/on cycle. When the Radial jumper (pin 1-2 shorted at user configuration jumper block) is used, the drive is continuously selected and requires a power-on/off cycle to clear Write-Fault. 5- 6 OPEN The Write Fault signal can only be cleared by a power on/off cycle. Use of this option in conjunc- tion with the DC-unsafe option is not recommended. 5- 6 CLOSED The Write Fault signal can be cleared by deselecting the drive. When the drive is deselected and the fault condition is corrected, the Write Fault signal will be false. These options allow the user to configure the Write Fault reset to specific system requirements. JP1/J7 Write Fault Options --------------------------- Implementation of the Write Fault Option (Pins not illustrated) is by factory order only. Jumper pins must be factory-installed. JP1 has three jumper pads, and is located adjacent to the 34-pin J1 connector. Standard: 1 and 2 jumpered on JP1 Write Fault will be cleared when Write Gate is false. A Write Fault will only occur when Write Gate is true. Latched: 2 and 3 jumpered on JP1 This option will maintain Write Fault true after Write Gate goes false and is recommended for controllers that do not edge-detect Write Fault. The latched option has two configurations which are provided at the User Configura- tion block, pins 5-6. J7 Factory test ----------------- 7- 8 OPEN This is a test function used during the manufactu- ring process and is not recommended for field use. When shorted, the actuator will continuously seek between Track 0 and the maximum data cylinder, ig- noring control signals sent via the interface. J7 Drive select ----------------- +-------------+-------+-------+-------+-------+ |Drive Select | 9-10 | 11-12 |13-14 |15-16 | |-------------+-------+-------+-------+-------+ |Drive 4 | CLOSED| OPEN | OPEN | OPEN | |Drive 3 | OPEN | CLOSED| OPEN | OPEN | |Drive 2 | OPEN | OPEN | CLOSED| OPEN | |Drive 1 | OPEN | OPEN | OPEN | CLOSED| +-------------+-------+-------+-------+-------+ The Drive Select line enables the controller to select and adress the drive. Control cable interface options may use either a daisy- chain or radial configuration. JP2 DC-Unsafe Option --------------------- Implementation of the DC-unsafe option is by factory order only. JP2 has two jumper pads, and when a jumper is installed, a DC- unsafe condition will cause a Write Fault to be sent to the interface. 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 ST124/125/138/ST138R/ST157R PRODUCT MANUAL 36045-006, REV.F 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. 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. ALL DRIVES EXCEPT ST124: 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. 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. 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. Recording Method ---------------- The ST124, ST125 and ST138 drives are designed to operate with the ST412 interface with MFM encoding at 5.0 Mbits/sec. transfer rate. Caution: Operation of an MFM-certified drive with an RLL controller is not approved by Seagate and may void your warranty. The ST138R and ST157R are designed to operate with the ST412 inter- face with Run Length Limited (2,7) encoding at 7.5 megabits/sec. data transfer rate. 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. 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% Precompensation --------------- The drive family does not require precompensation Auto Truncation --------------- If the controller issues an exessive number of step pulses that would place the read/write heads outside Track 0, or inside the maximum track, the drive enters auto-truncation mode. 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! Drive configuration ------------------- SET DRIVE TERMINATION RESISTORS Daisy-Chain: A daisy-chain configuration allows connection of a maximum of two drives on a common control cable. A separate data cable is required for each drive. The last drive in the chain (phy- sically farthest from the controller) reauires termination. All other drives should not be terminated. Maximum permitted cable length, measured from the controller to the last drive is 30.5 cm. Radial: Each radially connected drive has its own control and data cable. This configuration is not required for PC applications. ATTACH CONTROL AND DATA CABLES On most cables a colored stripe down one side designates pin 1. This should be aligned with pin 1 on the drive and controller connectors. SET DRIVE SELECT AND CHECK CONTROL CABLE PINS If pins 25 through 29 on the wide control cable are twisted, then both drives should be set to Drive Select 2. If these pins are not twisted on the command cable, the boot drive should be set to Drive Select 1, while the second drive (if present) should be set to Drive Select 2. In all cases, the boot drive must be physically located at the end of the drive cable. CMOS configuration ------------------ Basic information about the drive must be entered into the host system CMOS, so that it may properly access the drive for reading and writing data. The number of heads, cylinders and sectors per track are specific to each drive and collectively define the drive's geometry. CMOS configuration is system dependent and is usually accomplished through a utility such as SETUP. If the controller has an onboard BIOS, the drive type should be set to type zero, or the "no drive installed" option. If your system CMOS does not offer an exact match to the geometry listed, set the drive to a type which closely matches the drive geo- metry, BUT DOES NOT EXCEED THE HEAD AND CYLINDER COUNT SPECIFIED. A drive type which matches the number of heads exactly with a cylinder count less than or equal to the number of cylinders specified is pre- ferred. 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 -------------------- After the drive has properly configured for the host system, it may need to be low-level formatted. The low-level format writes the sector boundaries and track information to the drive. This provides the system with head positioning and defect management information. You will need to boot the system to the floppy drive. Run the DEBUG utility provided with DOS to access the low-level format program present on the controller card. Refer to the controller for the spe- cific address needed to initiate the low-level format routine. The most common command to initiate this routine is: g=C800:5. Verify the address (C800) and the offset with your controller manual. If a hard-error map has been provided with the drive, make shure the errors are specified to the utility during the low-level format pro- cess. If the controller does not have a ROM BIOS, you need a third-party software package such as Ontrack's Disk Manager or IBM's Advanced Diagnostics for low-level formatting the drive. 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 ST124/125/138/ST138R/ST157R 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. ST124/ST125 There will be no more than twenty-one (21) defects total per drive. Cylinders 0, 1, 2 and 3 are free of defects. ST138 There will be no more than forty-nine (49) defects total per drive. Cylinders 0, 1 and 2 are free defects. ST138R There will be no more than thirty-two (32) defects total per drive. Cylinders 0, 1 and 2 are free of defects. ST157R There will be no more than forty-nine (49) defects total per drive. Cylinders 0 and 1 are free defects. 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. Seek Time Definition and Timing ------------------------------- Seek time is defined as the time from leading egde of the first step pulse received to Seek Complete, including settling. All seek times are true statistical averages and are calculated with a step pulse of 10 sec., nominal power, sea level and 25*C ambient temperature. Important Note: Early ST125, ST138 and ST157 drives offered Dash-0 and Dash-1 versions. All drives currently produced feature the Dash-1 seek times. | ST124 | ST125-0| ST125-1| | | ST138-0| ST138-1| | |ST138R-0|ST138R-1| | |ST157R-0|ST157R-1| ----------------------------------+--------+--------+--------+ Track-to-Track msec. typ. | 12 | 8 | 8 | msec. max. | 15 | 10 | 10 | Average msec. typ. | 38 | 38 | 28 | Average msec. max. | 40 | 40 | 30 | Full-Stroke msec. typ. | 90 | 90 | 70 | msec. max. | 95 | 95 | 70 | Latency msec. avg. | 8.33 | 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. 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.