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 1993 ST-12400N SCSI-2 Fast (Hawk 2) +===========+ # REAR VIEW # (ST-12400N only) +===========+ 50 pin I/O Cable Connection | J1#========================1# /---------\ TOP (HDA) =#:::::::::::::::::::::::::#=| 0 0 0 0 |== \=========================/ \-5-G-G-12/ BOTTOM +===========+ # REAR VIEW # (ST-12400NC only) +===========+ 80 pin I/O and DC Power Connection | J1 /----|---------------\ TOP (HDA) ==========/ ×××××××××××××××××××× \========== (\-1------------------40/) 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 NC connector: AMP US p/n: 2-557103-1 straight-in, Male 80-pin 2-557101-1 right angle to PCB +=================+ # RIGHT SIDE VIEW # (Both ST-12400N and ST-12400NC) +=================+ BACK #=# J2 12345678 TOP (HDA) FRONT OF J1#======================P=W=A======================= OF DRIVE \=/ :::::::: BOTTOM DRIVE |||||||| |Terminator Power /||||||\ Reserved /|Terminator Power -/||||\- Start Delay (12 secs * ID) | Enable T-Res --/||\-- Motor Start | Parity Enable ---/\--- Write Protect | | | /--------------------------------\ \-| Termination Power-source Table | +--------------------------------+-------------\ |=====....=====....=====PWA edge===== | | | | 1 2 1 2 1 2 | | #-# #-# #---# 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 | \---------Default------------------------------/ +================+ # LEFT SIDE VIEW # (ST-12400N only) +================+ 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 ||| ID 1 -/|\- ID 4 ID 2 +============+ # FRONT VIEW # (Both ST-12400N and ST-12400NC) +============+ 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+, default If these ID jumper are used, then jumper installed) ID jumpers shown in left side view J5 or 80 pin I/O cable ARE NOT USED. ST-12400N Hawk 2 UNFORMATTED CAPACITY (MB) ________________2537 FORMATTED CAPACITY (xx SECTORS) (MB) _____2148 AVERAGE SECTORS PER TRACK ________________83 rounded down ACTUATOR TYPE ____________________________ROTARY VOICE COIL TRACKS ___________________________________49,799 CYLINDERS ________________________________2,621 user HEADS ______PHYSICAL______________________19 DISCS (3.5 in) ___________________________10 MEDIA TYPE _______________________________THIN FILM RECORDING METHOD _________________________ZBR RLL (1,7) INTERNAL TRANSFER RATE (mbits/sec)________26.8 to 45.6 EXTERNAL TRANSFER RATE (mbyte/sec) _______5 Async EXTERNAL TRANSFER RATE (mbyte/sec) _______10 Sync SPINDLE SPEED (RPM) ______________________5,411 AVERAGE LATENCY (mSEC) ___________________5.54 BUFFER ___________________________________256/1024 KByte Read Look-Ahead, Adaptive, Multi-Segmented Cache INTERFACE ________________________________SCSI-2 FAST ASA SECTORS PER DRIVE ________________________ TPI (TRACKS PER INCH) ____________________3000 AVERAGE ACCESS (ms) (read/write)__________9.0/10.5 Drive level without controller overhead SINGLE TRACK SEEK (ms) ___________________1 MAX FULL SEEK (ms) _______________________19 MTBF (power-on hours) ____________________500,000 POWER REQUIREMENTS: +12V START-UP (amps) _2.0 +12V TYPICAL (amps) __0.54 +5V START-UP (amps) __0.8 +5V TYPICAL (amps) ___0.43 TYPICAL (watts) ______9 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 Physical: Height (inches/mm): 1.63/41.4 Width (inches/mm): 4.00/101.6 Depth (inches/mm): 5.75/146.1 Weight (lbs/kg): 2.5/0.99 Already low-level formatted at the factory with twelve spare sectors per cylinder 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. (08/09/94)