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 1994 ST-32550W/WC SCSI-2 Fast Wide (Barracuda 2LP) �袴袴袴袴袴敲 � REAR VIEW � (ST-32550W only) 훤袴袴袴袴袴� 旼컴컴 ID 8 넬컴컴 ID 4 납旼컴 ID 2 납넬컴 ID 1 (TOP) J5 납납 ___________________ 旼� �1�/袴袴袴袴�\ �( 利利利利利利利利�1)固::::::납 0 0 0 0 팠 \컴컴컴컴컴컴냐컴�/ � 컴 牡�5횳횳�12� 68 pin I/O Cable� 납 Connection 납 (o o) - These pins not on 납 o o differential model WD Spindle Synch Cable Connector 컴冒 o o (pin-11 SSREF, pin-12 ground) � 2 1 Remote LED Connector 컴컴컴컴컴컴� � [pin-9 cathode (neg), � pin-10 anode (pos)] � � � 旼 J1 Terminator options 컨� (single-ended) 컴컴컴컴컴커 � o o (o o) o o o o �o�o� � � o o o�o� �o퇻 �o�o� o o � � �o�o� o쿽� 쿽쿽 쿽쿽� o o � � 2袴�1 2 突1 2槁 1 2賈�1 2 1 � � A B C D E � 읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸 A - Term. power from drive (default) B - Term. power to SCSI bus (only option available for differential WD) C - Term. power from SCSI bus D - Term. power to SCSI bus and drive E - Enable SCSI terminator (jumper on pins 5-6) �袴袴袴袴袴敲 � REAR VIEW � (ST-32550WC only) 훤袴袴袴袴袴� 80 pin I/O and DC Power Wall/bracket Connection � Female J1 /컴컴냐컴컴컴컴컴컴컴\ TOP (HDA) 袴袴袴袴袴/ 利利利利利利利利利利 \袴袴袴袴袴 (\�1컴컴컴컴컴컴컴컴컴40/) BOTTOM Notes on 80 pin I/O connector: pins 1 - 4 = +12v 41 - 44 = 12v GND 34 - 36 = +5v 74 - 76 = 5v GND 37 = SYNC 77 = LEDC 38 = MTRON 78 = DLYDST 39 = SCSIA0 79 = SCSIA1 40 = SCSIA2 80 = SCSIA3 Mating WC connector: AMP US p/n: 2-557103-1 straight-in, Male 80-pin 2-557101-1 right angle to PCB �袴袴袴袴袴袴袴袴敲 � RIGHT SIDE VIEW � (ST-32550W/WC) 훤袴袴袴袴袴袴袴袴� BACK 郞� J2 123456789 TOP (HDA) FRONT OF I/O팠袴袴袴袴袴袴袴袴袴袴�P�W�A袴袴袴袴袴袴袴袴袴袴袴� OF DRIVE 突� ::::::::: BOTTOM DRIVE 납납납납� 1-2 Reserved 컴줄납납읒좔� Reserved 7-9 3 Parity Disable 컴컴冒냅컴컴� Delay Motor Start 6 4 Write Protect 컴컴켸읕컴컴� Motor Start Enable 5 �袴袴袴袴袴袴� � FRONT VIEW � (ST-32550W/WC) 旼컴컴컴 +5V 훤袴袴袴袴袴暠 넬컴컴컴 Enable SCSI terminator 납旼컴컴 ID 8 납넬컴컴 ID 4 납납旼컴 ID 2 납납넬컴 ID 1 (J4 top row) TOP (HDA) 납납납1 袴P�W�A袴袴袴袴袴袴袴袴袴袴孤::::::::::팠� J4 BOTTOM 납납납납납 납납납납납 (J4 bottom row) Reserved 컨좋冒납납� No connection 컴컴켸납납� Ground 컴컴컴冒납� Unit Active LED pin (+) 컴컴컴켸납� SSREF (+) spindle sync 컴컴컴컴冒� Vendor Unique 컴컴컴컴켸� Fault LED pin (+) 컴컴컴컴컴� ST-32550W Barracuda 2LP UNFORMATTED CAPACITY (MB) ________________2541.3 FORMATTED CAPACITY (xx SECTORS) (MB) _____2147.4 AVERAGE SECTORS PER TRACK ________________108 rounded down ACTUATOR TYPE ____________________________ROTARY VOICE COIL TRACKS ___________________________________38,610 CYLINDERS ________________________________3,510 user HEADS ______PHYSICAL______________________11 DISCS (3.5 in) ___________________________6 MEDIA TYPE _______________________________THIN FILM RECORDING METHOD _________________________ZBR RLL (1,7) INTERNAL TRANSFER RATE (mbits/sec)________49.4 to 72.0 EXTERNAL TRANSFER RATE (mbyte/sec) _______5 Async EXTERNAL TRANSFER RATE (mbyte/sec) _______5.0 to 20 Sync SPINDLE SPEED (RPM) ______________________7,200 AVERAGE LATENCY (mSEC) ___________________4.17 BUFFER ___________________________________512 KByte Read Look-Ahead, Adaptive, Multi-Segmented Cache INTERFACE ________________________________SCSI-2 FAST Wide BYTES PER TRACK __________________________64,160 average SECTORS PER DRIVE ________________________ TPI (TRACKS PER INCH) ____________________4,048 BPI (BITS PER INCH) ______________________72,680 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) ____________________800,000 SHOCK (G's): operating (Read/Write) __________2 nonoperating ____________________50 ACOUSTICS (typ/max dBA) __________________4.7/ POWER REQUIREMENTS: +12V START-UP (amps) _1.26 +12V TYPICAL (amps) __0.88 idle +5V START-UP (amps) __0.91 +5V TYPICAL (amps) ___0.33 idle IDLE (watts) _________ LANDING ZONE (cyl) _______________________AUTO PARK IBM AT DRIVE TYPE ________________________0 or NONE Physical: Height (inches/mm): 1.00/25.4 Width (inches/mm): 4.00/101.6 Depth (inches/mm): 5.75/146.05 Weight (lbs/g): 1.2/545 Already low-level formatted at the factory with 9 spare sectors per cylinder and 1 spare cylinder per unit. ZBR = Zone Bit Recording = Variable sectors per track Seagate reserves the right to change, without notice, product offerings or specifications. (08/25/94)