SEAGATE TECHNOLOGY, INC. Customer Technical Support Bulletin Boards (300-9600, 8-N-1) 旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 � United States +1 408 438-8771 � United Kingdom +44 628 478011 � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 � Germany +49 89 140-9331 � Singapore +65 227-2217 � 읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸 (C)opyright 1991 ST-1480A AT Interface J5 Drive ID Select and � � J6 (located on side Configuration Select Header� � near rear) 컴컴컴컴컴컴컴컴컴컴컴쩡컴켸 읕컴컴컴컴컫컴컴컴컴� � o o1 40-pin I/O Cable Connector � +5v ---o o 郞袴袴袴袴袴袴袴袴袴1� o o o o o1 袴袴袴 J4�::::::::::�:::::::: � /컴컴컴컴�\ o o o o o � � 賈袴袴袴袴袴佶袴袴袴�2鳩� 0 0 0 0 넌E�D�C�B�A� Remote LED넨 윰Reserved (pin 20 missing for 읕5횳횳�12� (see below) Connection� 쿕umper keying purposes) DC Power 쿛osition 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). 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 is applied to J4 pin-39 for systems that require this signal from the Slave 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. ST - 1480A UNFORMATTED CAPACITY (MB) ________________492 FORMATTED CAPACITY (xx SECTORS) (MB) _____426 AVERAGE SECTORS PER TRACK ________________62 (rounded down) ACTUATOR TYPE ____________________________VOICE COIL TRACKS ___________________________________13,302 CYLINDERS ________________________________1474 HEADS ____________________________________9 DISCS ____________________________________5 MEDIA TYPE _______________________________THIN FILM RECORDING METHOD _________________________ARLL 1,7 (ZBR) INTERNAL TRANSFER RATE (mbits/sec) _______17 to 25 SPINDLE SPEED (RPM) ______________________4,412 INTERFACE ________________________________AT TPI (TRACKS PER INCH) ____________________1760 BPI (BITS PER INCH) ______________________ AVERAGE ACCESS (ms) ______________________14 SINGLE TRACK SEEK (ms) ___________________2.5 MTBF (power-on hours) ____________________150,000 POWER REQUIREMENTS: +12V START-UP (amps) _2.5 +12V TYPICAL (amps) __0.7 +5V TYPICAL (amps) ___0.7 TYPICAL (watts) ______8 MAXIMUM (watts) ______15 BUFFERED STEP PULSE RATE (micro sec) _____ 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 * 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 !WARNING! - 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. (4/12/91)