SEAGATE TECHNOLOGY, INC.
Customer Technical Support FAX Network +1 408 438-8137
Customer Technical Support Bulletin Boards (300-9600, 8-N-1)
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� 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-42400N Elite 2 Fast SCSI-2
�� This T-RES only on Differential model
Spindle Sync � � �� Terminator Power Source (see below)�Ŀ
�4��1�Ŀ ���*���1 4o�o3 �������1 �
�o oo A �ij����� 2o o1 ��ij���� �
o o o o o �o oo B �Terminator DIPS� Power o o o o �
o o o o o ��������������������������������� �12�G�G�5Ŀ o o o o �
������������P�W�A��͵::::::::::::::::::::::::1��͵ 0 0 0 0 ����������� �
4 2 1 � � �������������������������; \���������/ � � � � �
����� � � SCSI Cable Connector � � � � �
� � � � � � � �
� � ��� Master off/Slave on - Spindle Sync � � � � �
� ����� Write Protect option enable � � � � �
��������� SCSI ID � � � � �
Spinup Delay (10 secs * ID) �� � � � �
Motor Start option enable ���� � � �
Parity check DISable ������ � �
Sweep Cycle enable �������� �
�
���������������������������������� �
� Terminator Power Source Options ������������������������������������������
���������������������������������������������������������������������Ŀ
� 2 & 4 � Initiator supplies power over the SCSI Bus for terminators. �
� Drive supplies no terminator power. �
� 1 & 2 � Drive supplies power for its own terminator resistor-paks �
� but not to SCSI Bus. This is the factory setting. �
� 1 & 3 �
� AND � Drive supplies power for external terminator at end of the �
� 2 & 4 daisy chain. Terminator resistor-paks must be removed. �
� This option is recommended only for last drive on daisy �
� chain. �
������������������������������������������������������������������������
ST-42400N
Elite 2
UNFORMATTED CAPACITY _____________________2,501,187,360
FORMATTED CAPACITY (512 byte blk) ________2,129,644,544
AVERAGE SECTORS PER TRACK ________________83
ACTUATOR TYPE ____________________________ROTARY VOICE COIL
TRACKS ___________________________________49,913
CYLINDERS ________________________________2,627/2,624 (user)
HEADS ____________________________________19
DISCS (5.25 in) __________________________11
MEDIA TYPE _______________________________THIN FILM
HEAD TYPE ________________________________THIN FILM
RECORDING METHOD _________________________ZBR RLL (2,7)
INTERNAL TRANSFER RATE (mbits/sec) _______30-40
EXTERNAL TRANSFER RATE (mbyte/sec) _______10 (burst)
SPINDLE SPEED (RPM) ______________________5,400
AVERAGE LATENCY (mSEC) ___________________5.55
COMMAND OVERHEAD (mSEC) __________________<0.5
BUFFER ___________________________________256 Kbyte
Read Look-Ahead, Adaptive, Multi-Segmented
Cache
INTERFACE ________________________________SCSI-2 FAST
BYTES PER TRACK __________________________42,000-55,440
SECTORS PER DRIVE ________________________4,159,462
BYTES PER CYLINDER _______________________798,000-1,053,360
TPI (TRACKS PER INCH) ____________________2,250
BPI (BITS PER INCH) ______________________41,713
AVERAGE ACCESS (ms) ______________________11
SINGLE TRACK SEEK (ms) ___________________1.7
MAX FULL SEEK (ms) _______________________22.5
MTBF (power-on hours) Class A Room _______250,000
MTBF (power-on hours) Office _____________150,000
POWER DISSIPATION (watts) ________________33
POWER REQUIREMENTS:
+12V START-UP (amps) _
+12V TYPICAL (amps) __
+5V START-UP (amps) __
+5V TYPICAL (amps) ___
TYPICAL (watts) ______33
IDLE (watts) _________30
WRITE PRECOMP (cyl) ______________________N/A
REDUCED WRITE CURRENT (cyl) ______________N/A
LANDING ZONE (cyl) _______________________Auto
USER MANUAL PART NUMBER __________________
OTHER ____________________________________
Synchronized Spindles, Sweep Cycle Capability
ZBR = Zone Bit Recording = Variable sectors per track
** Already low-level formatted at the factory with six spare sectors
per cylinder, one spare cylinders/unit, one system cylinder/unit, and
one diagnostic cylinder/unit.
