Barracuda 2LP
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Capacity:
Speed:
Average Read Time:
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2.15 GB
7200 rpm
8 ms |
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ST-32550W/WC SCSI-2 Fast Wide (Barracuda 2LP)
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� REAR VIEW � (ST-32550W only)
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������ ID 8
������ ID 4
������ ID 2
������ ID 1
(TOP) J5 ����
___________________ ��� �1�/���������\
�( �����������������1)ͳ::::::�� 0 0 0 0 ��
\�����������ij����/ � �� ���5�G�G�12�
68 pin I/O Cable� ��
Connection �� back o o <--These pins not on
�� o o differential model WD
Spindle Synch Cable Connector ��ٳ front o o See special WD Term
(pin-11 SSREF, pin-12 ground) � 2 � 1 Power detail below
Remote LED Connector ������������� ������
[pin-9 cathode (neg), �
pin-10 anode (pos)] �
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�� J1 Terminator options (single-ended ONLY) ������ (differential) Ŀ
� o o o o o o o o �o�o� � �
� o o o�o� �o�o �o�o� o o � back 1o�o2 �
� �o�o� o�o� �o�o �o�o� o o � �o�o �
� 2���1 2 ��1 2; 1 2���1 2 1 � front �; �
� A B C D E � C �
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A - Term. power from drive (default)
B - Term. power to SCSI bus
C - Term. power from SCSI bus
D - Term. power to SCSI bus and drive
E - Enable SCSI terminator (jumper on pins 5-6)
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� REAR VIEW � (ST-32550WC only)
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80 pin I/O and DC Power Wall/bracket Connection
� Female
J1 /���ij���������������\ TOP (HDA)
����������/ �������������������� \����������
(\�1������������������40/) 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 WC connector: AMP US p/n: 2-557103-1 straight-in, Male 80-pin
2-557101-1 right angle to PCB
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� RIGHT SIDE VIEW � (ST-32550W/WC)
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BACK � J2 123456789 TOP (HDA) FRONT
OF I/O�����������������������P�W�A����������������������� OF
DRIVE �; ::::::::: BOTTOM DRIVE
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1-2 Reserved ���ٳ�������� Reserved 7-9
3 Parity Disable ����ٳ������� Delay Motor Start 6
4 Write Protect ������������� Motor Start Enable 5
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� FRONT VIEW � (ST-32550W/WC) �������� +5V
������������ͼ �������� Enable SCSI terminator
�������� ID 8
�������� ID 4
�������� ID 2
�������� ID 1 (J4 top row)
TOP (HDA) ������1
��P�W�A��������������������͵::::::::::��� J4
BOTTOM ����������
���������� (J4 bottom row)
Reserved ����ٳ�����
No connection �����ٳ����
Ground ������ٳ���
Unit Active LED pin (+) �������ٳ��
SSREF (+) spindle sync ��������ٳ�
Vendor Unique ���������ٳ
Fault LED pin (+) �����������
ST-32550W
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) _______5.0 to 20 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 Wide
ASA II
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 DISSIPATION (watts/BTUs) Active ____11/35
Idle ______9/31
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
Physical:
Height (inches/mm): 1.00/25.4
Width (inches/mm): 4.00/101.6
Depth (inches/mm): 5.75/146.05
Weight (lbs/g): 1.2/545
Already low-level formatted at the factory with 9 spare sectors
per cylinder and 1 spare cylinder per unit.
ZBR = Zone Bit Recording = Variable sectors per track
Seagate reserves the right to change, without notice, product
offerings or specifications. (05/20/96)
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