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SEAGATE TECHNOLOGY, INC.
1-800-SEAGATE
http://www.seagate.com
(C)opyright 1993
ST-31930N SCSI-2 Fast
ÉÍÍÍÍÍÍÍÍÍÍÍ»
º REAR VIEW º (ST-31930N only)
ÈÍÍÍÍÍÍÍÍÍÍͼ
50 pin I/O Cable Connection
³
J1ÕÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ1¸ /ÄÄÄÄÄÄÄÄÄ\ TOP (HDA)
͵:::::::::::::::::::::::::Æͳ 0 0 0 0 ³ÍÍ
ÔÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ; ÀÄ5ÄGÄGÄ12Ù BOTTOM
ÉÍÍÍÍÍÍÍÍÍÍÍ»
º REAR VIEW º (ST-31930NC only)
ÈÍÍÍÍÍÍÍÍÍÍͼ
80 pin I/O and DC Power Wall/bracket Connection
³
J1 /ÄÄÄijÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ\ TOP (HDA)
ÍÍÍÍÍÍÍÍÍÍ/ ×××××××××××××××××××× \ÍÍÍÍÍÍÍÍÍÍ
(\Ä1ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ40/) 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
2-557101-1 right angle to PCB
ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
º RIGHT SIDE VIEW º (Both ST-31930N and ST-31930NC)
ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ
BACK Õ͸ J2 12345678 TOP (HDA) FRONT
OF J1ÆÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ OF
DRIVE Ô; :::::::: BOTTOM DRIVE
³³³³³³³³
³Terminator Power Ù³³³³³³À Reserved
Ú´Terminator Power ÄÙ³³³³ÀÄ Start Delay (12 secs * ID)
³ Enable T-Res ÄÄÙ³³ÀÄÄ Motor Start
³ Parity Enable ÄÄÄÙÀÄÄÄ Write Protect
³
³
³ ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
ÀÄ´ Termination Power-source Table ³
ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
³ÍÍÍÍÍ....ÍÍÍÍÍ....ÍÍÍÍÍPWA edgeÍÍÍÍÍ ³
³ ³
³ 1 2 1 2 1 2 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
ÀÄÄÄÄÄÄÄÄÄDefaultÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
º LEFT SIDE VIEW º (ST-31930N only)
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
ID 1 ÄÙ³ÀÄ ID 4
ID 2
ÉÍÍÍÍÍÍÍÍÍÍÍÍ»
º FRONT VIEW º (Both ST-31930N and ST-31930NC)
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 J5
or 80 pin I/O cable ARE NOT USED.
ST-31930N
UNFORMATTED CAPACITY (MB) ________________1900
FORMATTED CAPACITY (xx SECTORS) (MB) _____1700
AVERAGE SECTORS PER TRACK ________________
ACTUATOR TYPE ____________________________ROTARY VOICE COIL
TRACKS ___________________________________
CYLINDERS ________________________________3898
HEADS ______PHYSICAL______________________7
DISCS (3.5 in) ___________________________4
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________ZBR RLL (1,7)
INTERNAL TRANSFER RATE (mbits/sec)________38 to 62
EXTERNAL TRANSFER RATE (mbytes/sec)_______10 Sync.
SPINDLE SPEED (RPM) ______________________5411
AVERAGE LATENCY (mSEC) ___________________5.54
BUFFER ___________________________________512 KByte
Read Look-Ahead, Adaptive,
Multi-Segmented Cache
INTERFACE ________________________________SCSI-2 FAST
TPI (TRACKS PER INCH) ____________________
AVERAGE ACCESS (ms) (read/write)__________9.3/10.5
Drive level without controller overhead
SINGLE TRACK SEEK (ms) (read/write)_______1.2/1.7
MAX FULL SEEK (ms) (read/write)___________19.4/20.4
MTBF (power-on hours) ____________________800,000
POWER REQUIREMENTS: +12V START-UP (amps) _1.7
+12V TYPICAL (amps) __0.36
+5V START-UP (amps) __
+5V TYPICAL (amps) ___0.54
TYPICAL (watts) ______7
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): 1.00/25.4
Width (inches/mm): 4.02/102.1
Depth (inches/mm): 5.77/146.6
Weight (lbs/kg): 1.5/0.68
Already low-level formatted at the factory with 1 spare sector
per track and 2 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/st31930n.txt.
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