Updated June 18, 1996
________________________________________________________________________
Models WDS L80 & L160 IBM Hard Disk Drive
________________________________________________________________________
http:\\www.storage.ibm.com\storage\techsup\hddtech\hddtech.htm
FEATURES
========
- 85/171 MB formatted capacity (512 bytes/sector)
- Industry standard interface: ANSI/SCSI-2
- Integrated controller
- Logical block addressing (LBA)
- Implied seeks
- SCSI Disconnect and reconnect capability
- Interface Odd parity supported
- 1:1 interleave
- 1,7 Run-Length Limited (RLL) encoding
- Constant Density "Bit Recording"
- SCSI data transfer rate: up to 5 MB/S (synchronous)
- 32 KB Segmented Look Ahead Buffer
- Command Queuing
- Auto Reassign Block
- Self-diagnostics on power up
- Automatic retry and data corrections on read errors
- No preventative maintenance required
- Media data transfer rate: 13.3 Mbits/Sec
- Closed loop actuator servo (embedded sector servo)
- Rotary voice coil actuator
- Automatic actuator lock
- Dedicated head landing zone
- Average seek time = 16mS/18.5mS
- All axis (6 directions) mounting permitted
- MTBF 150,000 hours
PERFORMANCE
===========
WDA-L80 WDS-L160
------- --------
Media Read/Write
data transfer--rate in
Mbits/Sec 13.3 13.3
Seek times (in mS, averaged & inc settle)
Read Write
Track to Track 4.0 5.0
Average length 16.0 18.5
Full length 30.0 32.5
Spindle Speed 3600RPM
Average Latency 8.33mS
Power ON to Drive
Ready 8.7 Sec (ave), 10.7 Sec (max)
Power OFF to Spindle
Stop 6 Sec (ave), 12 Sec (max)
ELECTRICAL CONNECTOR LOCATIONS
==============================
┌──────────────────────────────────────────┐
│ │
│ ┌───────────────────────────┬──────────┐ │
│ │ ......................... │ │ │
│ │ ......................... │ O O O O │ │
└─┴─────────────────────────┼─┴───────┼──┴─┘
│ │
SCSI Power
Pin 1 Pin 1
There is a choice of 2 power connections to this drive. One DC
power connector is designed to mate with AMP part 1-480424 (using AMP
pins P/N 350078-4). The other (3 pin) DC power connector is designed
to mate with MOLEX 5480-03 (using MOLEX pins 5479). Equivalent
connectors may be used. Pin assignments are show below, as viewed
from the end of the drive.
Pin # 4 3 2 1 1 2 3
╔════════════════╗ ┌────────────┐
║ ║ │ ┌┐ ┌┐ ┌┐ │
║ O O O O ║ │ ││ ││ ││ │
║ ║ │ └┘ └┘ └┘ │
╚════════════════╝ └────────────┘
+5V GNDGND +12V +5V +12V GND
TERMINATORS
===========
'T-RES is active terminator MYOGJ 'J' is terminator jumper switch.
SCSI Bus terminator jumper switch pin assignment is:
SCSI I/F Connector
┌──────────────────┬─────┐
├──────────────────┴─────┤
T-RES────┼──┌───────┐ │
│ └──┬─┬──┘ │
J ────┼─────│ │ │
│ └─┘ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │ ┌──────┐
│ │ │┌────┐│
│ │ ││0 0││ 3: Jumper switch
│ │ │└────┘│ Default "ON"
│ │ │ 0 0 │ 2: NC
│ │ │ │
│ │ │ 0 0 │ 1: NC
└────────────────────────┘ └──────┘
Card Module Side View I/F Connector Side
Figure 1 SCSI Bus Terminators Jumper Location and Pin Assignment
OPTION BLOCK
============
┌────────────────────────────────────────┐
│ │
│ ┌───────┐ │
│ │.......│ │
│ │... ...│ │
└────────────────────────────┴──────┼┴───┘
│
Options Block
Pin 1
Jumper Settings
---------------
Jumpers may be fitted to select the following options:
Pin Numbers
Auto spin-up control 9-10
Device SCSI-ID selection 1-2, 3-4, 5-6
(see table for details)
LED drive lines 13-14
A Bit is selected when a Jumper is in place
Auto
Address Jumpers Spinup LED
0 1 2 Enable Anode(+)
┌──┼───┼───┼───────┼───────┼──┐
│ LSB MSB │ │ │
│ ┌─┐ │
│ │O│ O O O O O │
│ │O│ O O O O O O │
│ └┬┘ │ │ │ │ │ │
└──┼───┼───┼───┼───┼───────┼──┘
├───┴───┴─┬─┴───┘ LED Cathode(-)
Example shows GND Pins
Address 1 selected
Option Block-SCSIID selection
Bit
0 1 2
┌───────────────────────┐ ┌───────────────────────┐
│ │ │ ┌─┐ │
│ O O O O O O │ │ O O │O│ O O O │
│ O O O O O O O │ = 0 │ O O │O│ O O O O │ = 4
│ │ │ └─┘ │
└───────────────────────┘ └───────────────────────┘
┌───────────────────────┐ ┌───────────────────────┐
│ ┌─┐ │ │ ┌─┐ ┌─┐ │
│ │O│ O O O O O │ │ │O│ O │O│ O O O │
│ │O│ O O O O O O │ = 1 │ │O│ O │O│ O O O O │ = 5
│ └─┘ │ │ └─┘ └─┘ │
└───────────────────────┘ └───────────────────────┘
┌───────────────────────┐ ┌───────────────────────┐
│ ┌─┐ │ │ ┌─┐┌─┐ │
│ O │O│ O O O O │ │ O │O││O│ O O O │
│ O │O│ O O O O O │ = 2 │ O │O││O│ O O O O │ = 6
│ └─┘ │ │ └─┘└─┘ │
└───────────────────────┘ └───────────────────────┘
┌───────────────────────┐ ┌───────────────────────┐
│ ┌─┐┌─┐ │ │ ┌─┐┌─┐┌─┐ │
│ │O││O│ O O O O │ │ │O││O││O│ O O O │
│ │O││O│ O O O O O │ = 3 │ │O││O││O│ O O O O │ = 7
│ └─┘└─┘ │ │ └─┘└─┘└─┘ │
└───────────────────────┘ └───────────────────────┘
Pins 8, 11, and 12 are reserved
SHIPPING DEFAULT SETTINGS
=========================
The DEVICE ID is set at 6 (ie, jumpers on pins 3-4 and 5-6).
AUTO SPIN-UP is enabled (ie, jumpers on pins 9-10).
NOTE: LED connections, pin 13 can source up to 18mA. Pin
14 can sink up to 100mA.
AUTO SPIN-UP, pin 9. If a jumper is fitted, the drive will spin-up
automatically after power on reset completes.
If a jumper is not fitted, the drive will not spin-up unless the
host system issues a "start command" to the drive.
OPERATING ENVIRONMENT
=====================
Humidity:
---------
Operating 8% to 90% noncondensing
Relative
Nonoperating 5% to 95% noncondensing
Relative
Wet Bulb Temperature:
---------------------
Maximum Wet Bulb:
Operating 29.4 degrees C noncondensing
Nonoperating 35 degrees C noncondensing
Elevation:
----------
Operating Altitude -150 to 3000m
Ship/Storage -150 to 12000m
Altitude
Temperature:
------------
Operating 5 to 55 degrees C
Storage -40 to 65 degrees C
Shipping -40 to 65 degrees C
Temperature
Gradient 15 degrees C per hour (maximum)
(Operating, Storage, & Shipping)
Air Cooling Requirement
-----------------------
The host system must provide sufficient air flow across the drive to
maintain the temperature at less than 60 degrees C (measured at the
center of the drives' top cover).
Operating Vibration
-------------------
Due to the complexity of this subject we recommend that users contact
the Distributor to discuss how to perform the necessary measurements
if they believe this to be an area which requires evaluation.
Nonoperating Vibration
----------------------
The Drive will withstand the following continuous vibration levels with
no degradation in performance: 2 - 200Hz @ 0.5G peak acceleration (for
a resonance search).
Resonance points: 1.5G zero to peak acceleration (for 15 mins).
Operating Shock
---------------
The Drive will withstand (with no permanent damage or loss of data) a
10G half-sine wave shock pulse of 11mS duration.
Nonoperating Shock
------------------
The Drive will withstand (with no permanent damage or loss of data) a
75G half-sine wave shock pulse of 11mS duration.
SIGNAL DEFINITION
=================
The pin assignments of interface signals are listed as follows
PIN Signal PIN Signal
01 GND 02 DB0
03 GND 04 DB1
05 GND 06 DB2
07 GND 08 DB3
09 GND 10 DB4
11 GND 12 DB5
13 GND 14 DB6
15 GND 16 DB7
17 GND 18 PARITY
19 GND 20 GND
21 GND 22 GND
23 GND 24 GND
25 OPEN 26 TERMPWR
27 GND 28 GND
29 GND 30 GND
31 GND 32 -ATN
33 GND 34 GND
35 GND 36 -BSY
37 GND 38 -ACK
39 GND 40 -RST
41 GND 42 -MSG
43 GND 44 -SEL
45 GND 46 -C/D
47 GND 48 -REQ
49 GND 50 -I/O
DC POWER REQUIREMENTS
=====================
Nominal Supply
Voltages +5 Volts +12 Volts
Maximum Ripple
(0-10 MHz) 100mV p-p 200Mv p-p
Voltage Supply Tolerance +/-5% +10%/-8%
Power Supply Current
(Amps) +5 Volts +12 Volts
*Start peak 0.5 0.93
*Idle average 0.3 0.12 (0.13/
WDS-L160)
*Random R/W 0.3 0.14 (0.15/
WDS-L160)
Random R/W = 40% random seek +40% read/write (1 write in 10 reads)
+ 20% idle.
NOTE: There is no requirement to limit the +5V current as the drive
incorporates its own protection, the system must limit the +12V current
supply to the drive to less than 20A.
DATA ORGANIZATION
=================
Physical Layout
---------------
WDS-L80 WDS-L160
Bytes per Sector 512 512
Total Data Sectors 85,658,112 171,316,224
Sectors per Track 44 44
Sectors per Cylinder 87 174
Spare Sectors per Cylinder 1 2
Number of data Heads 2 4
Number of Disks 1 2
Logical Layout 85 MB 170 MB
Max Relative Block 167,301 334,601
Addresses
Total Data Bytes 85,658,112 171,315,712
ELECTROMAGNETIC COMPATIBILITY
=============================
The Drive meets the following EMC requirements when installed in the
user system and exercised with a random accessing routine at maximum
data rate:
United States Federal Communication Commission (FCC) Rules and
Regulations Part 15, Subject J--Computer Devices "Class B Limits."
European Economic Community (EEC) directive #76/889 related to the
control of radio frequency interference and the Verband Deutscher
Elektrotechniker (VDE) requirements of German (GOP).
MECHANICAL DATA
===============
Dimensions
Height 19.9 +/- 0.4mm
Width 101.6 +/- 0.4mm
Depth 146.0 +/- 0.6mm
Weight 410g maximum
Mounting Orientation
The Drive can be mounted in any axis
(6 directions).
|...................146 +/- 0.6.................|
┌───────────────────────────────────────────────┐───
┌┴┐ │ .
│ │ │ .
│ │ │ .
│ │ │ .
│ │ │ .
│ │ │ .
│ │ │ .
│ │ │101.6 +/- 0.4
│ │ │ .
│ │ │ .
│ │(4X)M4 │ .
│ │ │ │ .
│ │ │ │ .
└┬┘ o o
└───────────────────────────────────────────────┘───
|..41.6 +/- 0.2..|.......60 +/- 0.1.........|
|----44.4 +/-0.1----|60.3 +/-0.2|
┌──────────────────────────────────────────────┐
┌┴┐ o o │
│ │ │
│ │ │ Rear
Front │ │ │
│ │ │
│ │ │
│ │ │
│ │ o │
│ │ │
│ │ │
│ │ │
│ │ │
│ │ │
└┬┘ o o │
└─────────────┼────────────────────────────────┘
└─(4X) M4
NOTE: Maximum screw lengths must not be exceeded.
MODE SELECT OPTIONS
===================
The following Mode Sense Pages are supported:
Page 1--Read/Write Error Recovery Parameters
TB (Transfer Block)
PER (Post Error)
DTE (Disable Transfer on Error)
DCR (Disable Correction Bit)
Read Retry Count
Correction Span
Write Retry Count
Page 2--Disconnect/Reconnect Parameters
Read Buffer Full Ratio
Write Empty Buffer Ratio
Page 3--Format Device Parameters
Page 4--Rigid Disk Drive Geometry Parameters
Page 8--Caching Parameters
RCD (Read Cache Disable)
Page A--Control Mode Page
Queue Algorithm Modifier
QErr (Queue Error Management)
DQue (Disable Queuing)
PACKAGING: The drive must be protected against Electro-Static
Discharge especially when being handled. The safest way to avoid
damage is to put the drive in an anti-static bag before ESD wrist
straps, etc, are removed.
Drives should only be shipped in approved containers, sever damage can
be caused to the drive if the packaging does not adequately protect
against the shock levels induced when a box is dropped. Consult the
dealer if you do not have an approved shipping container.
-------------------------------------------------------------------------
AMP is a trademark of AMP Incorporated. Molex is a trademark of Molex
Incorporated. DATA MATE is a trademark of AMP Incorporated. Western
Digital is a trademark of the Western Digital Corporation. NEXT is
a trademark of NEXT Corporation.
IBM OEM Europe PO Box 6 Langstone Road Havant Hampshire PO9 1SA
United Kingdom Telephone (44) 705 486363
This data sheet is not a substitute for the full product specification
which should be used when detailed information is required.
Product Description data represents IBM's design objectives and is provided
for comparative purposes; actual results may vary based on a variety of
factors. This product data does not constitute a warrant. Questions
regarding IBM's warrant terms or methodology used to derive this data
should be referred to your IBM OEM representative. Data subject to change
without notice.
