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-11950N SCSI-2 Fast (Barracuda 1) �袴袴袴袴袴敲 J01컴컴커 1커 컴컴컴횶4-1컴컴컴컴컴컴컴� � REAR VIEW � (see 1냄 �"� � 훤袴袴袴袴袴� below) 읕� �"� � �"쿕4 1-11 � Terminating Resistors커 �"�(see detail below) � 旼컴컴커 旼컴캐커 �"� � (TOP) 읕컴컴�1 읕컴컴�1 �"耗J4-11� � 郞袴袴袴袴袴袴袴袴袴袴袴袴�/袴袴袴袴�\ � � 孤::::::::::::::::::::::::1틂 0 0 0 0 팠 � � 突袴袴袴袴袴袴袴袴袴袴固袴舅�5횳횳�12� � 5 1 50 pin I/O Cable Connection켸 : : : : : : : : : : : � � � � � � � � 6 � 2 SCSI ID = 0 (none) � � � � � � � � � � � SCSI ID = 4 컴컴컴켸 � � � � � � � � � � SCSI ID = 2 컴컴컴컴켸 � � � � � � � � � SCSI ID = 1 컴컴컴컴컴켸 � � � � � � � � Reserved (default OFF) 컴컴컴컴� � � � � � � � Parity Disable 컴컴컴컴컴컴컴컴컴� � � � � � � Enable Motor Start 컴컴컴컴컴컴컴컴� � � � � � Delay Motor Start (10 sec * ID) 컴컴켸 � � � � Write Protect Enable 컴컴컴컴컴컴컴컴컴� � � � Remote LED Connector 컴컴컴컴컴컴컴컴컴컴� � � [pin-5 cathode (neg), pin-6 anode (pos)] � � Reserved (default OFF) 컴컴컴컴컴컴컴컴컴컴� � Spindle Synch Cable Connector 컴컴컴컴컴컴컴켸 (pin-1 SSREF, pin-2 ground) 旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 � J01 - Terminator Power Jumpers 쳐컴컴컴컴컴컴컴컴커 읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸 � Terminator power from the drive. �1컴� (default) 度퀑� � � Terminator power from pin 26 on the 靈� SCSI bus. 編編 咆鞭 Terminator to the SCSI bus on pin 26. 靈� 빗빗 度쏵 Terminator power to the SCSI bus and 靈爐� drive. 빗빗� 度쏵� Note: ST-11950ND (differential model) does not come with any provision to use Termination resistors. Therefore, SCSI bus needs to be externally terminated. ST-11950N UNFORMATTED CAPACITY (MB) ________________2030 FORMATTED CAPACITY (xx SECTORS) (MB) _____1689 AVERAGE SECTORS PER TRACK ________________81 rounded down ACTUATOR TYPE ____________________________STRAIGHT ARM TRACKS ___________________________________40,665 CYLINDERS ________________________________2,706 user HEADS ______PHYSICAL______________________15 DISCS (3.5 in) ___________________________8 MEDIA TYPE _______________________________THIN FILM RECORDING METHOD _________________________ZBR RLL (1,7) TRANSFER RATE INTERNAL (mbits/sec)________34.3 to 56.5 SPINDLE SPEED (RPM) ______________________7,200 AVERAGE LATENCY (mSEC) ___________________4.17 BUFFER ___________________________________1024 KByte Read Look-Ahead, Adaptive, Multi-Segmented Cache INTERFACE ________________________________SCSI-2 FAST BYTES PER TRACK __________________________50,888 average SECTORS PER DRIVE ________________________3,291,790 TPI (TRACKS PER INCH) ____________________3,047 BPI (BITS PER INCH) ______________________52,187 AVERAGE ACCESS (ms) (read/write)__________8.0/9.0 Drive level without controller overhead SINGLE TRACK SEEK (ms) ___________________0.6/0.9 MAX FULL SEEK (ms) _______________________17/19 MTBF (power-on hours) ____________________500,000 POWER REQUIREMENTS: +12V START-UP (amps) _2.18 +12V TYPICAL (amps) __0.83 idle +5V START-UP (amps) __1.0 +5V TYPICAL (amps) ___0.76 idle IDLE (watts) _________12.5 LANDING ZONE (cyl) _______________________AUTO PARK IBM AT DRIVE TYPE ________________________0 or NONE Physical: Height (inches/mm): 1.63/41.4 Width (inches/mm): 4.00/101.6 Depth (inches/mm): 5.97/146.1 Weight (lbs/kg): 1.8/0.80 Already low-level formatted at the factory with 6 spare sectors per cylinder and 1 spare cylinder/unit. ZBR = Zone Bit Recording = Variable sectors per track Seagate reserves the right to change, without notice, product offerings or specifications. (10/11/93)