--------------------------------------------------------------------------- T H I S I S A D O C U M E N T I N A S C I I - F O R M A T ! ! ! --------------------------------------------------------------------------- To see the document in correct way under Windows 1. You must have installed a font with full ASCII-Character-Set (like TERMINAL) 2. Use a DOS-Editor like EDIT from original DOS-Version. EDIT filename.txt 3. Switch to DOS-Box and type in TYPE filename.txt | MORE 4. Switch to DOS-Box and print the file COPY filename.txt LPT1 TYPE filename.txt > LPT1 --------------------------------------------------------------------------- T H I S I S A D O C U M E N T I N A S C I I - F O R M A T ! ! ! --------------------------------------------------------------------------- ****************************************************************************** P C - D I S K The Harddisk Information Database DCI AG, Germany www.pc-disk.de ****************************************************************************** S T 1 3 8 - 1 SEAGATE NO MORE PRODUCED Native³ Translation ÄÄÄÄÄÄÅÄÄÄÄÄÂÄÄÄÄÄÂÄÄÄÄÄ Form 3.5"/HH Cylinders 615³ ³ ³ Capacity form/unform 32/ 38 MB Heads 6³ ³ ³ Seek time í / track 28.0/ 8.0 ms Sector/track 17³ ³ ³ Controller MFM / ST412 Precompensation 65535 Cache/Buffer KB Landing Zone Data transfer rate 0.625 MB/S int Bytes/Sector 512 0.625 MB/S ext Recording method MFM operating ³ non-operating ÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄ Supply voltage 5/12 V Temperature øC 10ö50 ³ -40ö60 Power: sleep W Humidity % 8ö80 ³ 5ö90 standby W Altitude km -0.305ö 3.050³ -0.305ö 9.150 idle W Shock g 10 ³ 60 seek W Rotation RPM 3600 read/write 8.0 W Acoustic dBA spin-up W ECC Bit MTBF h 150000 Warranty Month Lift/Lock/Park YES Certificates CSA,FCC,IEC435,TUV,UL478,VDE P C - D I S K The Harddisk Information Database DCI AG, Germany www.pc-disk.de ********************************************************************** L A Y O U T ********************************************************************** SEAGATE ST124/125/138/138R/157R PRODUCT MANUAL 36045-006, REV.F ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ 1ÚÄ¿ ³²² DATA ³ ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄį ³ ³J7 ³²² Connector ³ ³ Configuration³ ³ ³²² 20-pin ³ alternate ³ Jumper block ÀÄÙ ³²² J2 ³ Position 1ÄÄÄÄÄÄÄ¿ ÚÄ¿ ³ ³ of J7 ÀÄÄÄÄÄÄÄÙ Termination³ ³ ³²² ³ Resistor ³ ³ ³²² ³ Pack ÀÄÙ1 ³²² ³ ³²² ³ ³²² Connector ³ ³²² 34-pin ³ ³²² J1 ³ ³²² ³ ³ ³ ³ÛÛ ³ ³ÛÛ Power J3 ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ 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. P C - D I S K The Harddisk Information Database DCI AG, Germany www.pc-disk.de ********************************************************************** 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 ----------------- ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄ¿ ³Drive Select ³ 9-10 ³ 11-12 ³13-14 ³15-16 ³ ³ÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄ´ ³Drive 4 ³ CLOSED³ OPEN ³ OPEN ³ OPEN ³ ³Drive 3 ³ OPEN ³ CLOSED³ OPEN ³ OPEN ³ ³Drive 2 ³ OPEN ³ OPEN ³ CLOSED³ OPEN ³ ³Drive 1 ³ OPEN ³ OPEN ³ OPEN ³ CLOSED³ ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÙ 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 ------------------------------------------- ÚÄÄÄÄÄÄÄÄÄÄÄÄ¿ pin 1 +12 VDC ³ 1 2 3 4 ³ pin 2 +12 Volts Return ÀÄÄÄÄÄÄÄÄÄÄÄÄÙ pin 3 + 5 Volts Return pin 4 + 5 VDC P C - D I S K The Harddisk Information Database DCI AG, Germany www.pc-disk.de ********************************************************************** 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 ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ÚÄÄ¿ ÚÄÄ¿ ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ ³ ³ ÃÄÄÄÄÄ¿ ÚÄÄÄÄÄ´ ³ ³ ³ x ³ ³ ³ ³ ³ ³ ³ ³ xÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿x ÚÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄ¿ ³ ³ ³ ³ ³ ³ ³³x x³³ ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ ³ ³ ³ ³ ³ ³ ³³ x x ³³ ³ ³ ³ ³ ³ ³ ³³ x x ³³ x x ³ ³ ³ ³ ³ ³ ³³ x x ³³ ÚÄÄÄÄÄÄxÄÄÄÄÄÄxÄÄÄÄÄÄÄ¿ ³ ÃÄÄÄÄÄÙ ÀÄÄÄÄÄ´ ³ ³³ xx ³³ ÀÄÂÄÄÄÄÄÄxÄÄxÄÄÄÄÄÄÄÂÄÙ ÀÄÄÙ ÀÄÄÙ ³³ x x ³³ ³ xx ³ ³³ x x ³³ ³ x x ³ ³³ x x ³³ ÀÄÄÄxÄÄÄÄÄÄÄÄxÄÄÄÄÙ ³x x³ x x xÀÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÙx 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 orienÄ tation. The drive should not be tilted front or back, in any position, by more than 5ø. 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 20ê resistive load on the +12 V line and an equivalent 8ê 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, 25øC ambient temperature, sea level and spindle rotating. Voltage tolerance (incl. ripple): ñ5% 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. P C - D I S K The Harddisk Information Database DCI AG, Germany www.pc-disk.de ********************************************************************** 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 æsec., nominal power, sea level and 25øC 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. ³ ST124 ³ ST125-0³ ST125-1³ ³ ³ ST138-0³ ST138-1³ ³ ³ST138R-0³ST138R-1³ ³ ³ST157R-0³ST157R-1³ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄ´ Track-to-Track msec. typ. ³ 12 ³ 8 ³ 8 ³ msec. max. ³ 15 ³ 10 ³ 10 ³ Average msec. typ. ³ 38 ³ 38 ³ 28 ³ Average msec. max. ³ 40 ³ 40 ³ 30 ³ Full-Stroke msec. typ. ³ 90 ³ 90 ³ 70 ³ msec. max. ³ 95 ³ 95 ³ 70 ³ Latency msec. avg. ³ 8.33 ³ 8.33 ³ 8.33³ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÙ 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. P C - D I S K The Harddisk Information Database DCI AG, Germany www.pc-disk.de ********************************************************************** G E N E R A L ********************************************************************** SEAGATE ST412 MFM/RLL ST412 Interface (MFM and RLL) =================================================================== ST412 Interface (MFM and RLL) ST-506 was predecessor without buffered seek 2 Cables: 1 each 34-pin Command Cable and 1 each 20-pin Data Cable ------------------------------------------------------------------- Command Cable Description J1 (34-pin Command) Host/Drive Pin Assignments GROUND RTN SIGNAL PIN SIGNAL PIN _____________________________________________________ 3 1 2 -HEAD SELECT 2 2 3 4 -HEAD SELECT 2 5 6 -WRITE GATE 7 8* -SEEK COMPLETE 9 10* -TRACK 0 11 12* -WRITE FAULT 0 13 14 -HEAD SELECT 2 15 16 -RESERVED 1 17 18 -HEAD SELECT 2 19 20* -INDEX 21 22* -READY 23 24 -STEP 25 (29)** 26 (28) -DRIVE SELECT 1 (2) 27 (27) 28 (26) -DRIVE SELECT 2 (1) 29 (25) 30 -DRIVE SELECT 3 31 32 -DRIVE SELECT 4 33 34 -DIRECTION IN * STATUS ENABLED WITH DRIVE SELECT ** TWISTED CABLE IN PARENTHESES J2 (20-pin Data) HOST/DRIVE PIN ASSIGNMENTS GROUND RTN SIGNAL PIN SIGNAL NAME PIN _____________________________________________________________ 2 1 -DRIVE SELECTED 4 3 RESERVED 6 5 RESERVED 8 7 RESERVED 10 9 RESERVED 12 11 GROUND 13 +MFM (RLL) WRITE DATA 14 -MFM (RLL) WRITE DATA 16 15 GROUND 17 +MFM (RLL) READ DATA 18 -MFM (RLL) READ DATA 20 19 GROUND Seagate Technology Desk Reference July 17 2000