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SEAGATE TECHNOLOGY, INC.
1-800-SEAGATE
http://www.seagate.com
(C)opyright 1991
ST-3500N SCSI-2 Fast
ÉÍÍÍÍÍÍÍÍÍÍÍ»
º REAR VIEW º
ÈÍÍÍÍÍÍÍÍÍÍͼ
50 pin I/O Cable Connection
³
J1ÕÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ1¸ /ÄÄÄÄÄÄÄÄÄ\ TOP (HDA)
͵:::::::::::::::::::::::::Æͳ 0 0 0 0 ³ÍÍ
ÔÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ; ÀÄ5ÄGÄGÄ12Ù BOTTOM
1ÄÄÄÄÄÄ¿ 1ÄÄÄÄÄÄ¿ 1ÄÄÄÄÄÄ¿
ÀÄÄÄÄÄÄÙ ÀÄÄÄÂÄÄÙ ÀÄÄÄÄÄÄÙ
ÀTerminating ResistorsÙ
ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
º RIGHT SIDE VIEW º
ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ
BACK Õ͸ J2 87654321 TOP (HDA) FRONT
OF J1ÆÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ OF
DRIVE Ô; :::::::: BOTTOM DRIVE
³³³³³³³³
³Terminator Power Ù³³³³³³À Reserved
Ú´Terminator Power ÄÙ³³³³ÀÄ Start Delay (16 secs * ID)
³ Factory Use ÄÄÙ³³ÀÄÄ Motor Start
³ Parity Enable ÄÄÄÙÀÄÄÄ Write Protect
³
³
³ ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
ÀÄ´ Termination Power-source Table ³
ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
³ 8 7 8 7 8 7 ³
³ ÖÄ· ÖÄ· A Drive Supplies Bus ³
³ ºøºø øºøº ÖøÄø· B Drive Supplies Own ³
³ Óø½ø øÓø½ Óø ø½ C Bus Supplies Drive ³
³ A B C ³
³ÍÍÍÍÍ....ÍÍÍÍÍ....ÍÍÍÍÍPWA edgeÍÍÍÍÍ ³
³ ³
ÀÄÄÄÄÄÄDefaultÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
º LEFT SIDE VIEW º
ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ If these ID jumpers are used,
then ID jumpers shown in front
view ARE NOT USED.
FRONT TOP (HDA) J5 ÕÍÍ1¸ Õ͸BACK
OF ÍÍÍÍÍÍÍÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͵:::Æ͵J1 OF
DRIVE BOTTOM ÔÍÍ; Ô;DRIVE
³³³
Note: On early drives ³ ID 1 ÄÙ³ÀÄ ID 4
with PCB# 75782480 these³ ID 2
ID jumpers are reversed.ÃÄÄ ID 4 ID 1
ÉÍÍÍÍÍÍÍÍÍÍÍÍ»
º FRONT VIEW º
ÈÍÍÍÍÍÍÍÍÍÍÍͼ
TOP (HDA) J6 ÕÍÍÍÍÍ1¸
ÍÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͵::::::ÆÍ
* BOTTOM ÔÍÍÍÍÍ;
³ 123456
LED ÄÙ ³³³³³³
ID 4 Ù³³³³À Reserved
ID 2 ÄÙ³³ÀÄ Remote LED (pin-3 +5v)
ID 1 ÄÄÙÀÄÄ 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)
A copy of this specification file may be obtained
by FTP at
ftp://ftp.seagate.com/techsuppt/scsi/st3500n.txt.
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