(o o) - These pins not on differential
������� o o model ND
� o o
� 2 1
�
�� J1 Terminator options �� (single-ended) ����������Ŀ
� o o (o o) o o o o �o�o� �
� o o o�o� �o�o �o�o� o o �
� �o�o� o�o� �o�o �o�o� o o �
� 2���1 2 ��1 2; 1 2���1 2 1 �
� A B C D E �
��������������������������������������������������������
A - Term. power from drive (default)
B - Term. power to SCSI bus (only option available for differential ND)
C - Term. power from SCSI bus
D - Term. power to SCSI bus and drive
E - Enable SCSI terminator (jumper on pins 5-6)
�����������������ͻ
� RIGHT SIDE VIEW � (ST-32550N)
�����������������ͼ
BACK � J2 123456789 TOP (HDA) FRONT
OF I/O�����������������������P�W�A����������������������� OF
DRIVE �; ::::::::: BOTTOM DRIVE
���������
1-2 Reserved ��ٳ�������� Reserved 7-9
3 Parity Disable ����ٳ������� Delay Motor Start 6
4 Write Protect ������������ Motor Start Enable 5
������������ͻ
� FRONT VIEW � (ST-32550N)
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J4
TOP (HDA) 1
��P�W�A��������������������͵::::::::::���
BOTTOM ����������
����������
Reserved ���ٳ������ Reserved
ID 4 �����ٳ����� Remote LED (pin-3 +5v)
ID 2 ������ٳ���� Spindle Synchronization
ID 1 �������� (pin-6 REF SIG+, default
jumper installed)
ST-32550N
Barracuda 2LP
UNFORMATTED CAPACITY (MB) ________________2541.3
FORMATTED CAPACITY (xx SECTORS) (MB) _____2147.4
AVERAGE SECTORS PER TRACK ________________108 rounded down
ACTUATOR TYPE ____________________________ROTARY VOICE COIL
TRACKS ___________________________________38,610
CYLINDERS ________________________________3,510 user
HEADS ______PHYSICAL______________________11
DISCS (3.5 in) ___________________________6
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________ZBR RLL (1,7)
INTERNAL TRANSFER RATE (mbits/sec)________49.4 to 72.0
EXTERNAL TRANSFER RATE (mbyte/sec) _______5 Async
EXTERNAL TRANSFER RATE (mbyte/sec) _______2.5 to 10 Sync
SPINDLE SPEED (RPM) ______________________7,200
AVERAGE LATENCY (mSEC) ___________________4.17
BUFFER ___________________________________512 KByte
Read Look-Ahead, Adaptive,
Multi-Segmented Cache
INTERFACE ________________________________SCSI-2 FAST
BYTES PER TRACK __________________________64,160 average
SECTORS PER DRIVE ________________________
TPI (TRACKS PER INCH) ____________________4,048
BPI (BITS PER INCH) ______________________72,680
AVERAGE ACCESS (ms) (read/write)__________8.0/9.0
Drive level without controller overhead
SINGLE TRACK SEEK (ms) ___________________0.6/0.9
MAX FULL SEEK (ms) _______________________17/19
MTBF (power-on hours) ____________________800,000
SHOCK (G's):
operating (Read/Write) __________2
nonoperating ____________________50
ACOUSTICS (typ/max dBA) __________________4.7/
POWER REQUIREMENTS: +12V START-UP (amps) _1.26
+12V TYPICAL (amps) __0.88 idle
+5V START-UP (amps) __0.91
+5V TYPICAL (amps) ___0.33 idle
IDLE (watts) _________
LANDING ZONE (cyl) _______________________AUTO PARK
IBM AT DRIVE TYPE ________________________0 or NONE