SEAGATE TECHNOLOGY, INC. Customer Technical Support FAX Network +1 408 438-8137 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-3283N Rear View 旼 50 pin SCSI Interface I/O connector � � DC power (top)郞袴袴袴袴袴袴袴袴袴袴袴袴� /�5횳횳�12\ 袴袴�::::::::::::::::::::::::1팠� 0 0 0 0 팠 (bottom)突袴袴袴袴袴袴袴袴袴袴袴袴� 읕컴컴컴컴� 旼컴컴1 旼컴컴1 旼컴컴1 읕컴컴� 읕컴컴� 읕컴컴� Terminating Resistor Packs ST-3283N Left View (top) 郞� Front....袴袴袴袴袴袴袴袴袴袴袴袴袴袴� I/O connector o o o 突� SCSI ID Address o o o � � � ID 1 켸 � � ID 2 컴켸 � ID 4 컴컴켸 ST-3283N Right View 郞� 1o o o DC Power 팠袴袴袴袴袴 o쿽 o6袴袴袴袴袴袴袴袴袴袴袴袴袴袴袴袴 突� 1o o 컴좔컴� o o o쿽4 Active/Passive Termination o o 컴좔� 컴쩡컴� � � Terminator Power 旼컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴커 � � Remote Start 컴쩡� � Active: Pins 1 & 2 shorted � 읕� Parity Enable � � only (+2.85V to � � � 110 �) for FAST � � � SCSI; default � � 쿛assive: Pins 2 & 4 shorted � � � AND pins 5 & 6 shorted � � � (+5V and GND to � � � 220/330 �) for � � � standard SCSI. � � 읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸 � 旼컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 쿟erminator Power: From SCSI Connector 컴컴컴컴컴컴컴컴 Pins 1 & 2 � � From Power Connector 컴컴컴컴컴컴컴� Pins 1 & 3 � � To SCSI Connector Only 컴컴컴컴컴컴� Pins 3 & 4 � � From Power Connector and 컴컴컴컴컴� Pins 1 & 2 AND � � to SCSI Bus (default) ----------------- 3 & 4 � � Terminating Resistors not Installed � Pins 2 & 4 � 읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸 ST-3283N Front View Clock Ground 커 旼 (Pin 3 removed for key) � � (top) -o o o o o � o1 袴袴袴袴袴袴袴袴袴袴袴袴�+o o o o o o o 袴袴� (bottom) � � � 읕쩡컴� � � � � Remote LED 컴컴켸 � � � Reserved 컴컴컴켸 � � Ext. Spindle Clock Synch 컴컴컴컴켸 � Reserved � � Reserved 쳐컴컴컴컴컴켸 Reserved � Reserved � ST-3283N UNFORMATTED CAPACITY _____________________ FORMATTED CAPACITY (xx SECTORS) __________248.62 AVERAGE SECTORS PER TRACK ________________57 rounded down ACTUATOR TYPE ____________________________STRAIGHT ARM TRACKS ___________________________________8,455 CYLINDERS ________________________________1,691 (user) HEADS ____________________________________5 DISCS (3.5 in) ___________________________3 MEDIA TYPE _______________________________THIN FILM HEAD TYPE ________________________________THIN FILM RECORDING METHOD _________________________ZBR RLL (1,7) INTERNAL TRANSFER RATE (mbits/sec) _______15.0 to 24.4 SPINDLE SPEED (RPM) ______________________4,500 AVERAGE LATENCY (mSEC) ___________________6.67 BUFFER ___________________________________128 Kbyte SeaCache INTERFACE ________________________________SCSI-2 Fast BYTES PER TRACK __________________________ SECTORS PER DRIVE ________________________485,601 TPI (TRACKS PER INCH) ____________________1,960 BPI (BITS PER INCH) ______________________38,000 AREAL DENSITY (MBits/sq in) ______________ AVERAGE ACCESS (ms) ______________________12 SINGLE TRACK SEEK (ms) ___________________<4 MAX FULL SEEK (ms) _______________________35 MTBF (power-on hours) Office _____________200,000 POWER REQUIREMENTS: +12V START-UP (amps) _1.5 +5V TYPICAL (amps) ___0.55 POWER MANAGEMENT (Watts): ACTIVE _______________5.7 IDLE _________________3.5 STANDBY ______________1.0 SLEEP ________________ WRITE PRECOMP (cyl) ______________________N/A REDUCED WRITE CURRENT (cyl) ______________N/A LANDING ZONE (cyl) _______________________AUTO IBM AT DRIVE TYPE ________________________0 Physical: Height (inches/mm): 1.00/25.4 Width (inches/mm): 4.02/102.1 Depth (inches/mm): 5.77/146.6 Weight (lbs/kg): 1.5/0.68 Note: If FAST SCSI transfer rates are used, then the active termination options must be used. If the transfer rates are 5.0 MBytes/sec and below, either method of termination can be used. Although active and passive terminated devices can be installed on the same bus, both ends of the cable should be terminated in the same manner, either both active or both passive. Note: If your application requires no terminators, remove the terminators from the circuit board. Merely removing the terminator power source selection jumper does not disconnect the terminator resistors from the circuit. ZBR = Zone Bit Recording = Variable sectors per track Seagate reserves the right to change, without notice, product offerings or specifications. (10/23/91)