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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 ?
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? Germany +49 89 140-9331 ? Singapore +65 227-2217 ?
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(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 ?
? ???? ???? ????? B Drive Supplies Own ?
? ???? ???? ?? ?? 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 ________________
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)