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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 ?
? ???? ???? ????? B Drive Supplies Own ?
? ???? ???? ?? ?? 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
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)