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rL:'
HEWLETT
~~ PACKARD SPECIFICATION CONTROL DRAWING
REVISION HISTORY
REV DOCUMENT APPVDBY DATE
EO JPM 7nl94
El JPM 7/13/94
E2 JPM 7/28/94
2.0 Gigabyte Wide Differential
3.5 inch Low Profile Disk Drive
Specification
Date this issue: 07128194 Title: 2.0GB3.5" Wide Differential Low Profile Disk Drive Page 1 of 23
Changes since previous Specification
Dwg.No. Rev.
issue noted by:' JPM PRRT.JMINARY
Approval: HP Part Number: 0950-2605
i
rl~ HEWLETT
SPECIFICATION CONTROL DRAWING
.:.1'''' PACKARD
1.0 TABLE OF CONTENTS ................................................. 2
2.0 INTRODUCTION ....................................................... 4
2.1 Scope ....................................................... 4
2.2 Applicable Documents ......................................... 4
3.0 REQUIRED DESIGN FEATURES ........................................ 5
3.1 MechanicallHardware ......................................... 5
32 Firmware .................................................... 5
4.0 FUNCTIONAL SPECIFICATIONS ........................................ 6
4.1 General Specifications ......................................... 6
4.2 Performance Specification ...................................... 6
4.3 Reliability and Ufe ............................................ 7
4.4 Interface Specification ......................................... 8
4.5 Power Specifications ........................................... 8
4.6 Diagnostics ................................................... 9
4.7 Power Management ..................................... 10
5.0 MECHANICAL SPECIFICATIONS ....................................... 11
5.1 Physical Specifications ......................................... 11
5.2 Mounting Orientation ......................................... 11
5.3 Acoustic Noise Level .......................................... 11
5.4 Power Interface ............................................... 12
5.5 Signal Interface ............................................... 12
5.6 Options ...................................................... 13
5.7 Cooling Requirements ......................................... 13
6.0 ENVIRONMENTAL SPECIFICATIONS ................................... 14
6.1 Operating Environment ............................... , ........ 14
6.2 Non-Operating Environment ................................... 14
6.3 Thansportation Environment .................................... 15
6.4 Product Safety & Emissions ..................................... 16
6.5 Labels and Markings ........................................... 17
7.0 DEFAULT VALUES ..................................................... 18
7.1 TID Jumpers ................................................. 18
7.2 Termination Power ............................................ 18
7.3 Mode Select Pages ............................................ 18
7.4 Bezel ........................................................ 18
Date this issue: 07/28/94 Title: 2.0GB3.5" Wide Differential Low Profile Disk Drive Page 2 of 23
Changes since previous Specification
Dwg. No. Rev.
issue noted . JPM
Approval: HP Part Number: 0950-2605
rL3 HEWLETT
.:.1'''' PACKARD SPECIFICATION CONTROL DRAWING
8.0 FIGURES AND TABLES ................................................ 18
Figure 1 Dimensions and Mounting ........................................ 19
Figure 2 Combination Connector Pin Assignment ................... 20
Thble 1 Current Requirements .................................. 20
Thble 2 Signal Assignments for Auxiliary Connector ............... 20
Thble 3 SCSI Interface Signals .................................. 21
Thble 4 SCSIID Settings ....................................... 22
Date this issue: 07/28/94 Title: 2.0GB 3.5" Wide Differential Low Profile Disk Drive Page 3 of 23
Changes since previous Specification
Dwg.No. Rev;
issue noted by: JPM PRET.JMINARY
Approval: lIP Part Number: 0950-2605
rl~ HEWLETT
.:r~ PACKARD SPECIFICATION CONTROL DRAWING
2.0 INTRODUCTION
2.1 SCOPE
This specification outlines the requirements for a 2.0 gigabyte, 3.5 inch by 1.0 inch high
form factor, SCSI rigid disk drive with 16 bit differential interface. This document
specifies the electrical, mechanical, environmental, reliability, and certification
requirements of the drive.
In the event of a difference between the manufacturer's specifications and those outlined
in this document the latter shall take precedence.
2.2 APPUCABLE DOCUMENTS
The following is a list of the documents by which this specification is based. For more detail, please
reference these documents as required.
"Enhanced Small Computer System Interface (SCSI-II)",
X3T9.2/86-109 Rev. 10h, available through CBEMA
ISO 7779 "Acoustics - Measurement of airborne noise emitted by computer and business
equiptment
Plug and Play SCSI Specification Version 1.0 (March 30,1994)
Date this issue: 07/28/94 Title: 2.0GB 3.5" Wide Differential Low Profile Disk Drive Page 4 of 23
Changes since previous Specification
Dwg.No. Rev.
issue noted by:" JPM p.KI4~LIMINARV
Approval: HP Part Number: 0950-2605
rL3HEWLETT
~~ PACKARD SPECIFICATION CONTROL DRAWING
3.0 REQUIRED DESIGN FEATURES
The device must contain and maintain certain design features that are required in the workstation
environment. The following is a list of the appropriate design requirements:
3.1 MECHANICAUHARDWARE
1) The device must automatically move the recording heads to a landing zone (completely
free of user data) and latch them there, upon the loss of DC power, without operator or
software intervention.
2) Not require any periodic or preventive maintenance.
3) Mechanism is to have a breather and filtration system in the HDA.
4) Provide dynamic braking of the disks on a power- down cycle.
5) Require no sequencing of power.
6) Device must have a minimum of a 32K dual port buffer system.
7) Be capable of supporting a minimum 48 bit ECC.
8) Glitchless drivers/receivers are to be used on the SCSI bus.
9) A set of adjacent pins, on the front of the drive, so that a cable for a remote LED
indicator can be used.
3.2 FIRMWARE
Refer to the Hewlett-Packard document "Standard Firmware for Disk Devices"
Date this issue: 07/28/94 Title: 2.0GB 3.5" Wide Differential Low Profile Disk Drive Page 5 of 23
Changes since previous
Specification
Dwg.No. Rev.
issue noted by: JPM PRRT..IMINARY
Approval: HPPart Number: 0950-2605
rL:WI HEWLETT
-.:.r..- PACKARD SPECIFICATION CONTROL DRAWING
4.0 FUNCTIONAL SPECIFICATIONS
The appropriate manufacturer's specifications contain information which must be used in conjunction
with this document. In the case of conflicting information, the HP specification shall take precedence.
4.1 GENERAL SPECIFICATIONS
4.1.1 Capacity
Unformatted: 2.5 GB (ref only)
Formatted (512): 4194685 blocks (must be exact)
MaxLBA 4194684 (must be exact)
4.2 PERFORMANCE SPECIFICATIONS
Note: The requirements of this section are to be met under all combinations of operating
environment and DC supply voltages of sections 5 and 6. Therefore it represents
worst-case requirements.
4.2.1 Seek Times (all numbers include settling time)
'lfack to track: 3.5 ms
Average: < 15.1 ms
Maximum: 24 ms
4.2.2 Disk Speed 1Rotational Latency
Average Latency: 5.56 msec or less (ref only)
Disk Speed: 5400 RPM minimum +1-0.5% (ref only)
4.2.3 Data 'lfansfer Rates
4.2.3.1 Internal (disk)
Burst: 25 to 46 mbitslsec
4.2.3.2 External (bus)
Async: 10MB/s
Sync: 20MB/s
4.2.4 Head Switching
Must be less than 500 usec
4.2.5 Command Overhead
Controller overhead: < 300 usec (ref only)
4.2.6 Spin -up I Spin -down time
Power-on to selection: 1 sec
Power-on to ready: 20 sec
Start command: 20 sec
Stop command: 20 sec
4.2.7 Interleaving
Interleave: 1:1
Date this issue: 07/28/94 Title: 2.0GB 3.5" Wide Differential Low Profile Disk Drive Page 6 of 23
Changes since previous Specification
Dwg. No. Rev.
issue noted b. JPM
Approval: HP Part Number: 0950-2605
Wl3 HEWLETT
.:r PACKARD
.. SPECIFICATION CONTROL DRAWING
4.3 RELIABILITY AND LIFE
The following information specifies the reliability, read and seek error rates, and the
expected life of the device. The requirements shall be met with no stabilization time and
with no regard to any particular environmental conditions under which the data was
written so long as it was within the operating range of section 5 and 6.
MTBF of the device: 800,000 hrs
MTTR of the device: 30 minutes
Design Component Life: 5 years
Preventive Maintenance: not required
Errors Rates (using retries and ECe)
Correctable Read Error Rate 1 in 1010 bits read
Uncorrectable Read Error Rate: 1 in 1014 bits read
Seek Error Rate: 1 in 106 seeks
Media Defects:
The manufacturer shall identify all media defects and provide a list of their
locations that is retrievable by accessing the drive's primary defect list. The
defect list need not be attached physically to the outside of the drive, although it
can be. The drive will be shipped with all defects found during manufacturing,
mapped to spare blocks.
No more than a maximum of 2 additional defects shall be allowed during the
first 24 hours of operation. After the initial 24 hours of operation, a maximum
of 50 defects will be allowed during the life of the drive.
Power Cycling: 10,000
The head I media interface shall be able to withstand 10,000 power-on I
power-off cycles without suffering any permanent damage or loss of data.
Date this issue: 07/28/94 Title: 2.0GB 3.5" Wide Differential Low Profile Disk Drive Page 7 of 23
Changes since previous Specification
Dwg.No. Rev.
issue noted by: JPM PRELIMINARY
Approval: HP Part Number: 0950-2605
SPECIFICATION CONTROL DRAWING
4.4 INTERFACE SPECIFICATION
Unless otherwise noted the drive shall meet all of the requirements of the following
specification:
SCSI-2 ANSI X3T9.2/86-109 Rev. 10h
4.5 POWER SPECIFICATIONS
The following requirements are applicable to the main PCB board power interface
connector (J2).
Voltage Requirements: +5 Volts (lo2A max.)
+ 12 Volts (2.2 A max.)
(Refer to Thble 1 for specific requirements under typical use.)
Voltage Tolerance: 5 Volts +/-5%
12 Volts +/-5%
+/-10% during start-up
Allowable Ripple: 5 Volts: 100 mV p-p from 0 to 100 KHz
12 Volts: 120 mV p-p from 0 to 100 KHz
Power Consumption: 16 watts maximum
Voltage sequencing requirements: None
Date this issue: 07/28194 Title: 2.0GB 3.5" Wide Differential Low Profile Disk Drive Page 8 of 23
Changes since previous Specification
Dwg.No. Rev.
issue noted by:' JPM PKI◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo