SEAGATE TECHNOLOGY, INC. Customer Technical Support FAX Network +1 408 438-8137 Customer Technical Support Bulletin Boards (300-9600, 8-N-1) /----------------------------------+---------------------------------\ | United States +1 408 438-8771 | United Kingdom +44 628 478011 | +----------------------------------+---------------------------------| | Germany +49 89 140-9331 | Singapore +65 227-2217 | \----------------------------------+---------------------------------/ (C)opyright 1991 ST-3500N SCSI-2 Fast +===========+ # REAR VIEW # +===========+ 50 pin I/O Cable Connection | J1#========================1# /---------\ TOP (HDA) =#:::::::::::::::::::::::::#=| 0 0 0 0 |== \=========================/ \-5-G-G-12/ BOTTOM 1------\ 1------\ 1------\ \------/ \---+--/ \------/ \Terminating Resistors/ +=================+ # RIGHT SIDE VIEW # +=================+ BACK #=# J2 87654321 TOP (HDA) FRONT OF J1#======================P=W=A======================= OF DRIVE \=/ :::::::: BOTTOM DRIVE |||||||| |Terminator Power /||||||\ Reserved /|Terminator Power -/||||\- Start Delay (16 secs * ID) | Factory Use --/||\-- Motor Start | Parity Enable ---/\--- Write Protect | | | /--------------------------------\ \-| Termination Power-source Table | +--------------------------------+-------------\ | 8 7 8 7 8 7 | | #-# #-# A Drive Supplies Bus | | #o#o o#o# #o-o# B Drive Supplies Own | | #o#o o#o# #o o# C Bus Supplies Drive | | A B C | |=====....=====....=====PWA edge===== | | | \------Default---------------------------------/ +================+ # LEFT SIDE VIEW # +================+ If these ID jumpers are used, then ID jumpers shown in front view ARE NOT USED. FRONT TOP (HDA) J5 #==1# #=#BACK OF ========P=W=A===============================#:::#=#J1 OF DRIVE BOTTOM \===/ \=/DRIVE ||| Note: On early drives | ID 1 -/|\- ID 4 with PCB# 75782480 these| ID 2 ID jumpers are reversed.+-- ID 4 ID 1 +============+ # FRONT VIEW # +============+ TOP (HDA) J6 #=====1# ==P=W=A==========================#::::::#= * BOTTOM \======/ | 123456 LED -/ |||||| ID 4 /||||\ Reserved ID 2 -/||\- Remote LED (pin-3 +5v) ID 1 --/\-- Spindle Synchronization (pin-6 REF SIG+) If these ID jumper are used, then ID jumpers shown in left side view ARE NOT USED. ST-3500N UNFORMATTED CAPACITY (MB) ________________502 FORMATTED CAPACITY (xx SECTORS) (MB) _____426 AVERAGE SECTORS PER TRACK ________________76 ACTUATOR TYPE ____________________________ROTARY VOICE COIL TRACKS ___________________________________10,829 CYLINDERS __PHYSICAL______________________1,547 (user) HEADS ______PHYSICAL______________________7 DISCS (3.5 in) ___________________________4 MEDIA TYPE _______________________________THIN FILM RECORDING METHOD _________________________ZBR RLL (1,7) INTERNAL TRANSFER RATE (mbits/sec)________21.7 to 31.9 EXTERNAL TRANSFER RATE (mbyte/sec) _______4 Async EXTERNAL TRANSFER RATE (mbyte/sec) _______10 Sync SPINDLE SPEED (RPM) ______________________4,535 AVERAGE LATENCY (mSEC) ___________________6.61 BUFFER ___________________________________240 KByte Read Look-Ahead, Adaptive, Multi-Segmented Cache INTERFACE ________________________________SCSI-2 FAST SECTORS PER DRIVE ________________________ TPI (TRACKS PER INCH) ____________________2150 AVERAGE ACCESS (ms) (read/write)__________9.9/11.4 SINGLE TRACK SEEK (ms) ___________________2 MAX FULL SEEK (ms) _______________________26 MTBF (power-on hours) ____________________200,000 POWER REQUIREMENTS: +12V START-UP (amps) _1.5 +12V TYPICAL (amps) __0.4 +5V START-UP (amps) __ +5V TYPICAL (amps) ___0.2 TYPICAL (watts) ______5 MAXIMUM (watts) ______ WRITE PRECOMP (cyl) ______________________N/A REDUCED WRITE CURRENT (cyl) ______________N/A LANDING ZONE (cyl) _______________________AUTO PARK IBM AT DRIVE TYPE ________________________0 or NONE Already low-level formatted at the factory with one spare sector per track and two spare cylinders/unit. ZBR = Zone Bit Recording = Variable sectors per track Seagate reserves the right to change, without notice, product offerings or specifications. (08/08/94)