Western Digital WDE4360 Product manual

Western Digital
SCSI Hard Drives
WDEnterprise
WDE2170
WDE4360
CCC: A9
Technical Reference Manual

© 1997 Western Digital Corporation
All Rights Reserved
Information furnished by Western Digital Corporation is believed to be accurate and reliable. No license
is granted by implication or otherwise under any patent or patent rights of Western Digital Corporation.
Western Digital Corporation reserves the right to change specifications at any time without notice.
Western Digital is a registered trademark. WD Enterprise and FIT Lab are trademarks of Western
Digital Corporation. Other marks may be mentioned herein that belong to other companies.
Western Digital Corporation
8105 Irvine Center Drive
Irvine, CA 92618
4079-001045 Rev. B 4/97
Western Digital

4079-001045 Rev. B RELEASED 04-08-97
WD Enterprise WDE2170/WDE4360
(CCC: A9)
Technical Reference Manual

RELEASED 04-08-97 4079-001045 Rev. B

WD Enterprise WDE2170/WDE4360 Table of Contents
4079-001045 Rev. B RELEASED 04-08-97 i
TTABLE OFABLE OF CCONTENTSONTENTS
1. DESCRIPTION AND FEATURES.............................................................................1
1.1. General Description.................................................................................................................1
1.2. Advanced Features .................................................................................................................. 2
1.3. Options ...................................................................................................................................3
2. SPECIFICATIONS................................................................................................4
2.1. Performance Specifications......................................................................................................4
2.2. Physical Specifications ............................................................................................................ 5
2.2.1. Physical Dimensions.................................................................................................. 6
2.3. Mechanical Specifications.......................................................................................................7
2.3.1. Mounting................................................................................................................. 10
2.4. Electrical Specifications ........................................................................................................ 11
2.4.1. Current Requirements and Power Dissipation..........................................................11
2.4.2. 12V Current Profile................................................................................................. 12
2.4.3. Input Voltage Requirements..................................................................................... 13
2.4.4. Ripple...................................................................................................................... 13
2.4.5. Bring-Up Sequence.................................................................................................. 13
2.5. Environmental Specifications................................................................................................ 14
2.5.1. Shock and Vibration................................................................................................ 14
2.5.2. Temperature and Humidity...................................................................................... 16
2.5.3. Cooling.................................................................................................................... 16
2.5.4. Atmospheric Pressure .............................................................................................. 17
2.5.5. Acoustics................................................................................................................. 17
2.6. Reliability Specifications ....................................................................................................... 20
2.7. Agency Approvals................................................................................................................. 20
2.7.1. Product Safety.......................................................................................................... 20
2.7.2. Electromagnetic Compatibility (EMC)..................................................................... 20
3. ADVANCED PRODUCT FEATURES......................................................................21
3.1. Compatibility Testing............................................................................................................ 21
3.2. SCSI-3 SPI Compliant........................................................................................................... 21
3.3. Embedded Servo Control....................................................................................................... 21
3.4. Read Caching and Pre-Fetch .................................................................................................21
3.5. Write Caching....................................................................................................................... 21
3.6. 512 Kilobyte Data Buffer....................................................................................................... 21
3.7. Adaptive Caching.................................................................................................................. 21
3.8. Command Queuing and Reordering....................................................................................... 22
3.9. Media Defect Management.................................................................................................... 22
3.10. Microcode Download............................................................................................................. 22
3.11. Reed Solomon ECC On-the-Fly............................................................................................. 22
3.12. CRC Data Protection............................................................................................................. 22
3.13. Zoned Recording................................................................................................................... 23
3.14. Headerless Format................................................................................................................. 23

Table of Contents WD Enterprise WDE2170/WDE4360
RELEASED 04-08-97 4079-001045 Rev. B
ii
3.15. LED Support......................................................................................................................... 23
3.16. Option Block Functions......................................................................................................... 24
3.17. Error Recovery Operations .................................................................................................... 25
3.18. Self-Monitoring, Analysis, and Reporting Technology (S.M.A.R.T.)..................................... 25
3.19. Hot Plug/Unplug Support ...................................................................................................... 26
4. SCSI INTERFACE AND COMMAND SET ..............................................................27
5. THE OPTION BLOCK ........................................................................................28
5.1. Physical Characteristics......................................................................................................... 28
5.2. Pin Designation..................................................................................................................... 28
5.3. Option Block Pin Assignments.............................................................................................. 29
5.4. SCSI ID Jumper Table........................................................................................................... 30
6. SCSI CONNECTORS........................................................................................ 31
6.1. Power Connectors and Cables................................................................................................ 31
6.2. SCSI Physical Interface......................................................................................................... 31
6.3. 50-Pin SCSI Connector ......................................................................................................... 32
6.4. 68-Pin SCSI Connector ......................................................................................................... 34
6.5. 80-Pin (SCA-2) SCSI Connector ........................................................................................... 36
7. INSTALLATION AND MAINTENANCE ....................................................................38
7.1. Electrostatic Discharge (ESD) Protection............................................................................... 38
7.2. Maintaining the Drive........................................................................................................... 38
8. TECHNICAL SUPPORT ......................................................................................39
9. GLOSSARY...................................................................................................... 40
10.APPENDIX A. — UNDERSTANDING THE MODEL NUMBER....................................43
11.INDEX .............................................................................................................44

WD Enterprise WDE2170/WDE4360 Table of Contents
4079-001045 Rev. B RELEASED 04-08-97 iii
LLIST OFIST OF FFIGURESIGURES
Figure 2-1. 50-pin Drive Dimensions.......................................................................................... 7
Figure 2-2. 68-pin Drive Dimensions.......................................................................................... 8
Figure 2-3. 80-pin Drive Dimensions.......................................................................................... 9
Figure 2-4. Drive Axis Definition .............................................................................................. 10
Figure 2-5. WDE2170 +12V Current Profile............................................................................. 12
Figure 2-6. WDE4360 +12V Current Profile............................................................................. 12
Figure 2-7. Drive Baseplate Thermocouple Location................................................................ 18
Figure 2-8. PCBA Thermocouple Locations ............................................................................. 19
Figure 5-1. Option Block and LED Pin Designation .................................................................. 28
Figure 6-1. 50-Pin SCSI Connector and Power Connector Pin Numbers.................................. 32
Figure 6-2. 68-Pin SCSI Conn., Remote Option Conn., and Power Conn. Pin Numbers........... 34
Figure 6-3. 80-Pin SCSI Connector Pin Numbers..................................................................... 36

Table of Contents WD Enterprise WDE2170/WDE4360
RELEASED 04-08-97 4079-001045 Rev. B
iv
LLIST OFIST OF TTABLESABLES
Table 2-1. WDE2170/4360 Performance Specifications............................................................ 4
Table 2-2. WDE2170/4360 Physical Specifications................................................................... 5
Table 2-3. WDE2170/4360 Physical Dimensions...................................................................... 6
Table 2-4. 50-pin Drive Dimensions.......................................................................................... 7
Table 2-5. 68-pin Drive Dimensions.......................................................................................... 8
Table 2-6. 80-pin Drive Dimensions.......................................................................................... 9
Table 2-7. WDE2170 Current Requirements and Power Dissipation ....................................... 11
Table 2-8. WDE4360 Current Requirements and Power Dissipation ....................................... 11
Table 2-9. Voltage Ripple ....................................................................................................... 13
Table 2-10. Shock and Vibration............................................................................................... 14
Table 2-11. Temperature and Humidity..................................................................................... 16
Table 2-12. Maximum & Reliability Operating Temperature Limits............................................ 16
Table 2-13. Allowable Altitude Ranges...................................................................................... 17
Table 2-14. Sound Power Level................................................................................................ 17
Table 2-15. WDE2170 and WDE4360 Reliability Parameters................................................... 20
Table 5-1. Option Block Pin Assignments............................................................................... 29
Table 5-2. SCSI ID Jumper Table........................................................................................... 30
Table 6-1. 50-pin Drive Power Connector and Cable............................................................... 31
Table 6-2. 68-pin Drive Power Connector and Cable............................................................... 31
Table 6-3. 50-Pin SCSI Connector Pin Assignments............................................................... 33
Table 6-4. DC Power Connector ............................................................................................. 33
Table 6-5. 68-pin SCSI Connector Pin Assignments ............................................................... 35
Table 6-6. Remote Option for 68-Pin Connector (single-ended and differential versions)........ 36
Table 6-7. DC Power Connector (single-ended and differential versions)................................ 36
Table 6-8. 80-Pin (SCA-2) SCSI Connector Pin Assignments ................................................. 37

WD Enterprise WDE2170/WDE4360 Description and Features
4079-001045 Rev. B RELEASED 04-08-97
1
1. DESCRIPTION AND FEATURES
1.1. General Description
Designed to set a new direction in mass storage solutions, the WD Enterprise™ low-
profile 3.5-inch hard drives are the first in a family of 7200 RPM products. The
outstanding performance, capacity, and reliability of these mass storage solutions make
them the most competitive price/performance choice for workstations, servers, and
multi-user systems.
The WDE2170 and WDE4360 drives feature formatted capacities of 2.1 and 4.3
gigabytes with media data transfer rates up to 140 Mbits per second. These drives are
SCSI-3 SPI compliant and support Ultra Fast and Ultra Fast Wide host transfer rates of
up to 40 MB/s. Advanced read/write caching, command queuing, command reordering
(seek and rotational), Self Monitoring and Reporting Technology (S.M.A.R.T.) and
SCSI Configure Automatically (SCAM) are standard features on the Western Digital
Enterprise hard drives.
Western Digital hard drives are designed and manufactured to the highest standards of
quality and reliability. WD Enterprise drives incorporate the mechanical platform design
and proven recording technologies of Western Digital’s award-winning Caviar drives.
This quality design means the WD Enterprise drives have fewer disks and heads which
translates into many performance and reliability advantages. The WDE2170 and
WDE4360 drives deliver the performance, capacity, and reliability demanded by all high
performance enterprise systems.

Description and Features WD Enterprise WDE2170/WDE4360
RELEASED 04-08-97 4079-001045 Rev. B
2
1.2. Advanced Features
Product Features
 Formatted Capacities of 2.17 GB and 4.36 GB
 Low-profile 1-Inch (25.4 mm) in Height
 7200 RPM Spindle Speed
 SCSI-3 SPI Compliant; Ultra Fast/Ultra Fast Wide with SCA-2 interface supported
 512 kilobytes Programmable Multi-segmented Data Buffer (1 MB option)
 Zoned Recording
 Headerless Format
 SCAM Plug-N-Play Compliant
 Single-ended or Differential SCSI Drivers/Receivers (optional)
 Active Termination (available on 50- and 68-pin single-ended drives)
 Downloadable Firmware (both interface and servo code)
 Embedded Servo
 Balanced Spindle
 Dynamic Spindle Brake
 Vertical or Horizontal Mounting
Performance Features
 Media Data Transfer Rate up to 140 Mbits/s
 Average Read Seek Time of 8 ms
 4.17 ms Rotational Latency
 Command Queuing
 Command Reordering (Seek and Rotational)
 Write/Read Coalescing
 Adaptive Caching Algorithm
 Self-Optimizing Buffer Ratios
 Adaptive Segmented Cache
 Auto-Read Reallocation/Auto-Write Reallocation (ARRE/AWRE)
 Adaptive Servo Functions
Reliability Features
 Self Monitoring and Reporting Technology (S.M.A.R.T.)
 Direct Hot-Plug Capability in SCA-2 Configuration
 Hardware ECC On-The-Fly Error Correction
 CRC Data Buffer Protection
 Sector Slipping Defect Management
 Self Diagnostics on Power Up
 1,000,000 Hour MTBF Projected
These advanced product features are further defined in section 3. In certain cases we
refer you to other documents for additional detail. To obtain a document, contact your
local Western Digital sales office, authorized Western Digital reseller, or access the
Western Digital web page at www.wdc.com

WD Enterprise WDE2170/WDE4360 Description and Features
4079-001045 Rev. B RELEASED 04-08-97
3
1.3. Options
Upon request, the following options are incorporated at the time of production.

Data Buffer of 1 Megabyte
The standard data buffer size is 512 kilobytes. You may order a 1 megabyte option.
For more details, refer to the interface matrix table in Appendix A.

Single-unit Shipping Pack Kit
The drive is shipped in bulk packaging to provide maximum protection against
damage during transit. Units shipped individually require additional protection as
provided by the single-unit shipping pack. Contact your local Western Digital sales
office for ordering information.

Differential SCSI
The WD Enterprise drive provides, as an option, differential SCSI drivers/receivers
on the 68-pin interface configuration. For more details, refer to the interface matrix
table in Appendix A.

Termination Power
50-pin and 68-pin drives have the ability to supply termination power to the SCSI
bus. This option can be enabled by setting the corresponding jumper on the option
block.

Specifications WD Enterprise WDE2170/WDE4360
RELEASED 04-08-97 4079-001045 Rev. B
4
2. SPECIFICATIONS
2.1. Performance Specifications
Table 2-1. WDE2170/4360 Performance Specifications
PERFORMANCE CRITERIA WDE2170/WDE4360 SPECIFICATIONS
Average Seek
•Read
•Write 8 ms
9.5 ms
Track-to-Track Seek
•Read
•Write 1 ms
2.5 ms
Full Stroke Seek < 18 ms
Average Latency 4.17 ms
Rotational Speed 7200 RPM
Data Transfer Rate
•Media to Buffer
•Buffer to Host
81-140 Mbits/s
40 MB/s max.
Buffer Size1512 KB
1 MB optional
Error Rate - Unrecoverable < 1 in 1014 bits read
Spindle Start Time < 30s to ready
Spindle Stop Time < 20s
Contact Start/Stop Cycles (CSS)220,000
1User can access the entire 512 KB or 1 MB data buffer.
2Must not exceed defined environmental specification.
Note: This table represents typical values under nominal conditions.

WD Enterprise WDE2170/WDE4360 Specifications
4079-001045 Rev. B RELEASED 04-08-97
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2.2. Physical Specifications
Table 2-2. WDE2170/4360 Physical Specifications
Physical Specifications WDE2170 WDE4360
Formatted Capacity12170 MB 4360 MB
Interface(s) Ultra Fast
•(50-pin)
Ultra Fast Wide
•(68-pin)2
•(80-pin SCA-2)
Ultra Fast
•(50-pin)
Ultra Fast Wide
•(68-pin)2
•(80-pin SCA-2)
Actuator Type Rotary Voice Coil Rotary Voice Coil
Media Type Thin Film Thin Film
Head Type Thin Film Inductive Thin Film Inductive
Servo Type Embedded Embedded
Number of Disks 2 4
Number of Data Surfaces 4 8
Number of Heads 4 8
Bytes per Sector3512 512
Tracks per Inch 6150 6150
Bits per Inch (000) 125 (ID) 125 (ID)
Areal Density 769 Mb/in2769 Mb/in2
Total Cylinders 5956 5956
Zones per Surface 20 20
User Sectors per Drive (512 byte) 225 (OD), 133 (ID) 225 (OD), 133 (ID)
Recording Method 0,4,4 RLL40,4,4 RLL
ECC5144-bit Reed Solomon 144-bit Reed Solomon
1Western Digital defines a megabyte (MB) as 1,000,000 bytes and a gigabyte (GB) as
1,000,000,000 bytes.
2Differential option available on 68-pin models.
3The standard is 512 byte sectors. Optionally, we will support 512-528 bytes per sector
in even byte increments. Capacity will change depending on sector size chosen.
4Run Length Limited
5ECC has 144-bit span in hardware for correction on-the-fly.

Specifications WD Enterprise WDE2170/WDE4360
RELEASED 04-08-97 4079-001045 Rev. B
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2.2.1. Physical Dimensions
Table 2-3. WDE2170/4360 Physical Dimensions
Physical U.S. Metric
Characteristic Dimension Tolerance Dimension Tolerance
Height 1.00 inch ± 0.02 inch 25.4 mm ± 0.51 mm
Length 5.75 inches ± 0.02 inch 146.05 mm ± 0.51 mm
Width 4.00 inches ± 0.02 inch 101.6 mm ± 0.51 mm
Weight WDE2170 1.1 pounds ± 0.11 lbs. 0.48 kg ± 0.05 kg
Weight WDE4360 1.2 pounds ± 0.11 lbs. 0.53 kg ± 0.05 kg

WD Enterprise WDE2170/WDE4360 Specifications
4079-001045 Rev. B RELEASED 04-08-97
7
2.3. Mechanical Specifications
Figure 2-1 through Figure 2-3 show the mounting dimensions and locations of the screw
holes for the WDE2170 and WDE4360 drives.
Figure 2-1. 50-pin Drive Dimensions
Table 2-4. 50-pin Drive Dimensions
Dimension Inches Millimeters
A1 4.000 ±.020 101.60 ±0.51
A2 3.750 ±.010 95.25 ±0.25
A3 2.375 ±.010 60.32 ±0.25
A4 1.750 ±.010 44.45 ±0.25
A5 5.750 ±.020 146.05 ±0.51
A6 .625 ±.020 15.87 ±0.51
A7 1.638 ±.010 41.60 ±0.25
A8 1.787 ±.010 45.39 ±0.25
A9 4.000 ±.010 101.60 ±0.25
A10 .250 ±.010 6.35 ±0.25
A11 1.000 ±.020 25.40 ±0.51
A12 .035 ±.020 0.89 ±0.51
A13 .300 ±.020 7.62 ±0.51

Specifications WD Enterprise WDE2170/WDE4360
RELEASED 04-08-97 4079-001045 Rev. B
8
Figure 2-2. 68-pin Drive Dimensions
Table 2-5. 68-pin Drive Dimensions
Dimension Inches Millimeters
A1 4.000 ±.020 101.60 ±0.51
A2 3.750 ±.010 95.25 ±0.25
A3 2.375 ±.010 60.32 ±0.25
A4 1.750 ±.010 44.45 ±0.25
A5 5.750 ±.020 146.05 ±0.51
A6 .625 ±.020 15.87 ±0.51
A7 1.638 ±.010 41.60 ±0.25
A8 1.787 ±.010 45.39 ±0.25
A9 4.000 ±.010 101.60 ±0.25
A10 .250 ±.010 6.35 ±0.25
A11 1.000 ±.020 25.40 ±0.51
A12 .067 ±.020 1.70 ±0.51
A13 .410 ±.020 10.41 ±0.51

WD Enterprise WDE2170/WDE4360 Specifications
4079-001045 Rev. B RELEASED 04-08-97
9
Figure 2-3. 80-pin Drive Dimensions
Table 2-6. 80-pin Drive Dimensions
Dimension Inches Millimeters
A1 4.000 ±.020 101.60 ±0.51
A2 3.750 ±.010 95.25 ±0.25
A3 2.375 ±.010 60.32 ±0.25
A4 1.750 ±.010 44.45 ±0.25
A5 5.750 ±.020 146.05 ±0.51
A6 .625 ±.020 15.87 ±0.51
A7 1.638 ±.010 41.60 ±0.25
A8 1.787 ±.010 45.39 ±0.25
A9 4.000 ±.010 101.60 ±0.25
A10 .250 ±.010 6.35 ±0.25
A11 1.000 ±.020 25.40 ±0.51
A12 .069 ±.020 1.75 ±0.51
A13 2.000 ±.020 50.80 ±0.51

Specifications WD Enterprise WDE2170/WDE4360
RELEASED 04-08-97 4079-001045 Rev. B
10
2.3.1. Mounting
The WD Enterprise drives feature side and bottom mounting holes, which allow the
drive to be mounted in any orientation. See Figure 2-4 for orientation axes.
The hard drive is a precision mechanical assembly. Improper mounting may distort the
drive frame and impair its ability to function. For instructions on installing the drive,
including drive handling and mounting, refer to the WD Enterprise Installation Guide
(document number 4079-001046).
Figure 2-4. Drive Axis Definition

WD Enterprise WDE2170/WDE4360 Specifications
4079-001045 Rev. B RELEASED 04-08-97
11
2.4. Electrical Specifications
2.4.1. Current Requirements and Power Dissipation
Table 2-7. WDE2170 Current Requirements and Power Dissipation
Operating
Mode Current Population Mean + 4 Sigma Current Population Mean Power Pop Mean + 4 Sigma Power Population Mean
12 VDC 5 VDC
SE/Diff.412 VDC 5 VDC SE/Diff.4SE/Diff.4SE/Diff.4
Spin-up peak DC
1.22A 635/780 mA peak DC 1.15A 580/760 mA ___ ___
Seek
50 ops/s1mean DC
390 mA 645/795 mA mean DC 345 mA 585/770 mA 7.65/8.70 W 7.05/8.14 W
Idle2255 mA 625/785 mA 210 mA 570/760 mA 5.96/6.85 W 5.35/6.29 W
Read/Write3365 mA 645/795 mA 325 mA 585/770 mA 7.65/8.70 W 7.05/8.14 W
Notes: All values at 25°C, 5.0V, 12.0V input.
1Example of doing 50 random ops/sec.
2The idle condition is defined by the motor running at the full rated RPM with no seeking or read/write
operations being performed. The drive was track following on the OD cylinder for these
measurements.
3This is for a ratio of four reads per one write.
4Differential option available on 68-pin models only.
Table 2-8. WDE4360 Current Requirements and Power Dissipation
Operating
Mode Current Population Mean + 4 Sigma Current Population Mean Power Pop Mean + 4 Sigma Power Population Mean
12 VDC 5 VDC
SE/Diff.4 12 VDC 5 VDC
SE/Diff.4 SE/Diff. 4SE/Diff.4
Spin-up peak DC
1.24A 625/790 mA peak DC 1.16A 595/725 mA ___ ___
Seek
50 ops/s1mean DC
520 mA 625/790 mA mean C 480 mA 600/735 mA 9.22/9.95 W 8.71/9.38 W
Idle2390 mA 610/790 mA 350 mA 585/730 mA 7.60/8.40 W 7.06/7.80 W
Read/Write3500 mA 625/790 mA 460 mA 600/735 mA 9.22/9.95 W 8.71/9.38 W
Notes: All values at 25°C, 5.0V, 12.0V input.
1
Example of doing 50 random ops/sec.
2
The idle condition is defined by the motor running at the full rated RPM with no seeking or read/write
operations being performed. The drive was track following on the OD cylinder for these
measurements.
3
This is for a ratio of four reads per one write.
4
Differential option available on 68-pin models only.

Specifications WD Enterprise WDE2170/WDE4360
RELEASED 04-08-97 4079-001045 Rev. B
12
2.4.2. 12V Current Profile
The following graphs show the +12V current profile for the WDE2170 and WDE4360
drives during spin-up and run.
Figure 2-5. WDE2170 +12V Current Profile
0 1 2 3 4 5 6 7 8 9 10
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
TIME (Seconds)
CURRENT (Amps)
WDE2170
Spinup Peak AC Current
Spinup Peak DC Current
Figure 2-6. WDE4360 +12V Current Profile
0 1 2 3 4 5 6 7 8 9 10
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
TIME (Seconds)
CURRENT (Amps)
WDE4360