SEAGATE TECHNOLOGY, INC. Customer Technical Support FAX Network +1 408 438-8137 Customer Technical Support Bulletin Boards (300-9600, 8-N-1) ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ United States +1 408 438-8771 ³ United Kingdom +44 628 478011 ³ ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´ ³ Germany +49 89 140-9331 ³ Singapore +65 227-2217 ³ ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ (C)opyright 1991 ST-1480A AT Interface NOTE: This figure and the following description of each jumper position is only valid on drives that have J6 with 4 pins (2x2).-->¿ ³ J5 Drive ID Select and ³ ³ J6 (located on side Configuration Select Header³ ³ near rear) ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÙ ÀÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄ ³ o o1 40-pin I/O Cable Connector ³ +5v ---o o ÕÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͸ o o o o o1 ÍÍÍÍÍÍ J4³::::::::::ù::::::::1³ /ÄÄÄÄÄÄÄÄÄ\ o o o o o ³ ³ ÍÏÍÍÍÍÍÍÍÍÍÍÑÍÍÍÍÍÍÍÍÍÏͳ 0 0 0 0 ³ÍEÍDÍCÍBÍAÍ Remote LED³Ù À³Reserved (pin 20 missing for ÀÄ5ÄGÄGÄ12Ù (see below) Connection³ ³Jumper keying purposes) DC Power ³Position J5 JUMPER | FUNCTION: A REFSIG: This location provides a port for external connection of the synchronized spindle reference signal (pin-1) and ground (pin-2). The reference signal is bi-directional, single-ended, and terminated without an external resistor. It is also available on J4 pin-28 if the factory jumper is installed. The drive will self-determine if it is a master of slave for spindle synchronization. B HOST SLV/ACT: When this shunt is installed, -SLAVE PRESENT (provided by the output of a 74HCT14) is applied to J4 pin-39 for systems that require this signal from the Master drive. If jumper "B" is installed, then jumper "E" must not be installed. C MASTER: When this shunt is installed, the drive is configured as the Master. When not installed, the drive is a Slave. D SLAVE PRESENT: When installed, this shunt indicates to the Master drive that a Slave is present. This shunt must be installed on the Master drive in a two-drive system. E ACTIVE: When this shunt is installed, DASP- is made present on J4 pin-39. If "E" is installed, then "B" must not be installed. ====================================== NOTE: This figure and the following description of each jumper position is only valid on drives that have J6 with 6 pins (2x3).-->¿ ³ J5 Drive ID Select and ³ ³ J6 (located on side Configuration Select Header³ ³ near rear) ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÙ ÀÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄ ³ o o o1 ³ +5v ---o o o 40-pin I/O Cable Connector ³ ÍÍÍÍÍÍÍÍ ÕÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͸ o o o o o1 1 2 3 J4³::::::::::ù::::::::1³ /ÄÄÄÄÄÄÄÄÄ\ o o o o o Remote LEDÃÙ ³ À´Reserved ÍÏÍÍÍÍÍÍÍÍÍÍÑÍÍÍÍÍÍÍÍÍÏͳ 0 0 0 0 ³ÍÍÍÍÍÍÍÍÍÍÍ ConnectionÙ ³ ³Jumper (pin 20 missing for ÀÄ5ÄGÄGÄ12Ù (see below)Ä¿ ³ ÀPosition keying purposes) DC Power ÚÄÄÄÄÄÄÄÄÙ ATA mode ÄÄÙ ³ ÚÄJ5ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ ÚÄ¿ ÚÄ¿ ÚÄ¿ 1 ³ ³ ³o³ o-C´oÃE´oÃG-o ³ ³ ³oÃB-o ³o³ ³o³ o ³ ³ ÀAÙ ÀDÙ ÀFÙ ³ ³ ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ ³ ÀÄÄDefaults shown in solid linesÄÄÙ J5 Jumper Function Description ------------------------------- A B (A=vertical, pins 9 & 10; B=horizontal, pins 8 & 10) OFF OFF Drive is the slave (Drive 1). OFF ON Drive is the master (Drive 0) with slave (Drive 1) present. ON* OFF Drive s the master (Drive 0). C (C=horizontal, pins 5 & 7) ON Slave (Drive 1) Present is connected to J4 pin 39. Jumpers "D" or "E" cannot be installed if jumper "C" is installed. D (D=vertical, pins 5 & 6) ON* DASP- is connected to J4 pin 39. Jumpers "C", "D", "F", or "G" cannot be installed if jumper "E" is installed. OFF REFSIG is not connected to J4 pin 39. E (E=horizontal, pins 3 & 5) ON REFSIG is connected to J4 pin 39. Jumpers "C", "D", "F", or "G" cannot be installed if jumper "E" is installed. OFF REFSIG is not connected to J4 pin 39. F (F=vertical, pins 3 & 4) ON* No external reference for REFSIG. Jumpers "E", "G", or "H" cannot be installed if jumper "F" is installed. OFF This location provides a port for external connection of the synchronized spindle reference signal (pin 3) and ground (pin 4). G (G=horizontal, pins 1 & 3) ON REFSIG is connected to J4 pin 28. Jumpers "E" or "F" cannot be installed if jumper "G" is installed. OFF REFSIG is not connected to J4 pin 28. J6 Jumper Funtion Description (2x3 jumper block) ------------------------------------------------- 1 Remote LED connection. Pin 6 is connected to +5v through a 147 ohm resistor. Pin 5 is the LED driver. 2 ATA mode. When the jumper is ON, IORDY is not connected to J4, DMACK- is connected to J4 pin 27, and DMARQ is connected to J4 pin 29. When the jumper is OFF, IORDY is connected to J4 pin 27, DMACK- is connected to J4 pin 29, and DMARQ is connected to J4 pin 21. 3 Reserved jumper position. ST - 1480A UNFORMATTED CAPACITY (MB) ________________490.9 FORMATTED CAPACITY (xx SECTORS) (MB) _____426.1* AVERAGE SECTORS PER TRACK ________________62 (rounded down) ACTUATOR TYPE ____________________________VOICE COIL TRACKS ___________________________________13,302 CYLINDERS ________________________________1,475 (user) HEADS ____________________________________9 DISCS ____________________________________5 MEDIA TYPE _______________________________THIN FILM RECORDING METHOD _________________________ZBR RLL (1,7) INTERNAL TRANSFER RATE (mbits/sec) _______17 to 25 SPINDLE SPEED (RPM) ______________________4,412 AVERAGE LATENCY (mSEC) ___________________6.8 BUFFER ___________________________________64 Kbyte Read Look-Ahead, Non-Adaptive, Multi-Segmented Cache INTERFACE ________________________________AT BYTES PER TRACK __________________________36,819 avg. TPI (TRACKS PER INCH) ____________________1,760 BPI (BITS PER INCH) ______________________ AVERAGE ACCESS (ms) ______________________14 SINGLE TRACK SEEK (ms) ___________________2.5 MAX FULL SEEK (ms) _______________________26 MTBF (power-on hours) ____________________150,000 POWER REQUIREMENTS: +12V START-UP (amps) _2.5 +12V TYPICAL (amps) __0.54 +5V TYPICAL (amps) ___0.3 TYPICAL (watts) ______8 MAXIMUM (watts) ______15 WRITE PRECOMP (cyl) ______________________N/A REDUCED WRITE CURRENT (cyl) ______________N/A LANDING ZONE (cyl)________________________AUTO PARK IBM AT DRIVE TYPE ________________________** Possible translation: 895 cyl, 15 heads, 62 sectors = 426,163,200 Note: A "custom" or "user-definded" CMOS drivetype may ask for a numerical value for the Write Precompensation cylinder and for the Landing Zone cylinder. A basic rule-of-thumb for drive models that do not require the old Write Precomp technique or a Landing Zone because they are Auto-Parking is to add 1 to the cylinder value being used. As an example: If cylinders equaled 820, then both Write Precomp and Landing Zone would be entered as 821. Some BIOS will convert this to 65535 or -1, which are functionally equivalent to "none (not used)". * Two spare sectors per cylinder, 2 spare cylinders per unit. ** MAY REQUIRE FORMATTING AND PARTITIONING SOFTWARE. ALSO, CHECK TO SEE IF YOUR CMOS SETUP HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE AVAILABLE. (see below) PHYSICAL/LOGICAL equivalent to NATIVE/TRANSLATION ZBR = Zone Bit Recording = Variable sectors per track Already low-level formatted at the factory. Since a User-definable or Custom translation geometry may be used, it is imperative that the values be written down and kept with your permanent records for retrieval in the event of CMOS battery failure. Seagate reserves the right to change, without notice, product offerings or specifications. (8/30/91)