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Hard Drive: CONNER: CFS-425A CABO 425MB 3.5"/SL ATA2 FAST




C F S - 4 2 5 A                 C A B O    CONNER
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/SLIMLINE         Cylinders    3687|  826|     |
Capacity form/unform   425/      MB        Heads           2|   16|     |
Seek time   / track  15.0/ 3.0 ms          Sector/track     |   63|     |
Controller           IDE / ATA2 FAST/ENHA  Precompensation   826
Cache/Buffer            64 KB SEGMENTED    Landing Zone
Data transfer rate          MB/S int       Bytes/Sector      512
                     13.000 MB/S ext
Recording method     RLL 1/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C         5 55    |    -40 60
Power: sleep          1.0 W     Humidity     %         8 80    |      8 80
       standby        1.0 W     Altitude    km    -0.061  3.048| -0.061 12.192
       idle           3.8 W     Shock        g         5       |     75
       seek           5.7 W     Rotation   RPM      3600
       read/write     4.9 W     Acoustic   dBA        34
       spin-up            W     ECC        Bit
                                MTBF         h     250000
                                Warranty Month
Lift/Lock/Park     YES          Certificates

Layout

CONNER CFS-425A QUICK REFERENCE GUIDE REV. C, 12/1994

  +---------------------------------------------------------+
  |                                                         |XXI
  |                                                         |XXN
  |                                                         |XXT 40PIN
  |                                                         |XXE
  |                                                         |XXR
  |                                                         |XXF
  |                                                         |XXA
  |                                                         |XXC
  |                                                         |XXE
  |                                                         |XX
  |                                                         |XX
  ++-+C/D                                                   |
  ++ |                                                      |XX J2
  ++ |C/S                                                   |xx Power
  ++ |                                                      |XX
  ++-+                                                      |XX J6
  +---------------------------------------------------------+   Power

Jumpers

CONNER CFS-425A QUICK REFERENCE GUIDE REV. C, 12/1994

Jumper Setting
==============

The C/D jumper is used to determine whether the drive is a master
(drive C) or a slave (drive D). The drive is configured as a master,
when jumpered, and a slave when not jumpered.

 Master/Standalone
 -----------------
  C/D A/C CS
    x  o  o      C/D CLOSED
    X  o  o

 Slave
 -----
 C/D A/C CS
    o  o  o      All OPEN
    o  o  o

 Cable Select Master or Slave
 ----------------------------
 C/D A/C CS
    o  o  x      CS CLOSED
    o  o  X

Master/Slave Configuration
--------------------------
When two drives are daisy-chained on the host interface, one must be
designated as the master drive (C: drive) and one as the slave drive
(D: drive).

Commands from the host are written in parallel to both drives.

When the C/D jumper on the drive is closed, the drive will assume the
role of a master. When C/D is open, the drive will act as a slave. In
single-drive configurations, C/D must remain in the closed (master)
position.

For each command sent from the host, the DRV bit in the drive/head
register selects the master or the slave drive. When the DRV bit is
reset (0), the master drive is selected, and when the DRV bit is set
(1), the slave drive is selected. Once the drives receive the
command, only the drive with jumper C/D set to the appropriate
position will execute the command. For example, if the DRV bit is
set, only the slave drive (jumper C/D open) will execute the command.

Note: If the command is a diagnostic command, both drives will
execute the command and the slave will report its status to the
master via the Host PDIAG signal.

Throughout this manual, drive selection always refers to the state of
the DRV bit and the position of the C/D jumper.

Cable Select
------------
This optional method of drive Master/Slave designation can be enabled
by jumper selection. If used, special cabling can be used
to selectively ground the CSEL interface signal of the drive intended
to be drive C (0). This drive will then function as the Master. If
CSEL is allowed to float the drive will recognize itself as drive D
(1) and function as the Slave.

-HOST PDIAG Pin 34
This signal shall be asserted by the slave to the master that it
has completed diagnostics. A 10K ohm pull-up resistor shall be
used on this signal by each drive. Following a POR, a software reset,
or a RESET-, the slave will negate PDIAG- within 1 ms (to indicate to
the master that it is busy). The slave will then assert PDIAG- within
30 seconds to indicate that it is no longer busy and is able to
provide status.

After the assertion of PDIAG-, the slave may be unable to
accept commands until it has finished its reset procedure and is
ready (DRDY =1).

Following the receipt of a valid Execute Device Diagnostics
command, the slave will negate PDIAG- within 1 ms to indicate
to the master that it is busy and has not yet passed its drive
diagnostics. If the slave is present, then the master will wait for
up to 5 seconds from the receipt of a valid Execute Device
Diagnostics s command for the slave to assert PDIAG-. The
slave should clear BSY before asserting PDIAG-, as PDIAG- is
used to indicate that the slave has passed its diagnostics and is
ready to post status.

If DASP- was not asserted by the slave during reset initialization,
the master will post its own status immediately after it completed
diagnostics and clear the slave status register to 00 hex. The master
may be unable to accept commands until it has finished its reset
procedure and is Ready (DRDY = 1).

-DASP Pin 39
DASP- (drive active/slave present). This is a time-multiplexed
signal which indicates that a drive is active, or that the slave is
present. This signal is an open-collector output and each drive
has a 10K pull-up resistor. During power-on initialization or after
RESET is negated, DASP- shall be asserted by the slave within 400 ms
to indicate that the slave is present.

The master shall allow up to 450 ms for the slave to assert DASP-. If
the slave is not present, the master may assert DASP- to drive an
activity LED.

DASP- shall be negated following acceptance of the first valid
command by drive 1 or after 31 seconds, whichever comes first.
Any time after negation of DASP-, either drive may assert DASP- to
indicate that a drive is active.

Install

CONNER CFS-425A QUICK REFERENCE GUIDE REV. C, 12/1994

Notes on Installation
=====================

Installation direction
----------------------

     horizontally                           vertically
   +-----------------+             +--+                       +--+
   |                 |             |  +-----+           +-----+  |
   |                 |             |  |     |           |     |  |
 +-+-----------------+-+           |  |     |           |     |  |
 +---------------------+           |  |     |           |     |  |
                                   |  |     |           |     |  |
                                   |  |     |           |     |  |
 +---------------------+           |  +-----+           +-----+  |
 +-+-----------------+-+           +--+                       +--+
   |                 |
   |                 |
   +-----------------+

The drive will operate in all axis (6 directions).

Mounting the Drive
------------------
You can mount the drive either vertically or horizontally. The drive
will meet all performance specifications when mounted at any
orientation.

Caution: The surface(s) on which you mount the drive should be
flat and parallel to prevent uneven pressure on the drive.
Mounting the drive on an uneven surface could cause the drive's
base to deform, degrading drive performance.

Caution: When using the side mounting holes, verify the screw
length to ensure clearance from the drive's printed circuit board
before tightening the screw.

 J6 Standard 4-pin Power Connector
 ---------------------------------
 +-----------------------
 | +-----J6-----+ +----   pin 1  +12V
 | | 1  2  3  4 | | 1     pin 2   GND
 | +------------+ +--     pin 3   GND
 +------------------      pin 4   +5V

 J2 Optional 3-pin Power Connector
 ---------------------------------
 +------------------------------
 | +-----J6-----+ +--J2---+ +---   pin 1  +5 V
 | | 1  2  3  4 | | 1 2 3 | | 1    pin 2  +12V
 | +------------+ +-------+ +----  pin 3   GND
 +----------------------------------

Mounting Holes
--------------
Side: 6-32 UNC-2B .16 max. insertion
Bottom: 6-32 UNC-2B .22 max. insertion

Brushless DC
------------
A brushless DC direct-drive motor assembly is mounted on the drive's
base. The motor rotates the drive's spindle at 3600 RPM. The
motor/spindle assembly is dynamically balanced to provide minimal
mechanical runout to the disks. A dynamic brake is used to provide a
fast stop to the spindle motor and return the heads to the landing
zone when power is removed.

Head Positioning Mechanism
--------------------------
The read/write heads are supported by a mechanism coupled to a rotary
voice coil actuator.

Read/Write Heads and Disks
--------------------------
Data is recorded on a 95mm diameter disk using 3350-type Metal In Gap
(MIG) and/or Thin Film composite heads.

The CFS425A contains:

- one disk with two data surfaces

- two read/write heads

At power-down, the heads are automatically retracted to the inner
diameter of the disk and are latched and parked on a landing zone
that is separate from the data tracks.

The drive has a single 40-pin data connector, as well as an auxiliary
connector which is reserved for factory or evaluation use.

The drive has two power connectors, only one of which should be used
at a time.

The two connectors provide connection versatility to a number of host
systems.

The mating connector for the 4 pin connector is AMP 1-480424-0
(housing) and AMP 60619-4 (loose piece) or 61117-4 (strip) contacts.

Features

CONNER CFS-425A PRODUCT GUIDE

The drive assembly housing consists of an extruded aluminum base on
which is mounted a drawn aluminum cover. In addition, the aluminum
cover has a designed in breather filter and diffusion tube that
prevents entry of contaminants which might degrade head and media
reliability. Aluminum tape seals the joint between the base and
cover. Critical drive components are contained within this
contaminant-free environment, which is commonly referred to as the
Head-Disk Assembly (HDA).

Safety Standards
----------------
The drive is designed to comply with relevant product safety
standards, including:

 - UL 478, 5th edition, Standard for Safety of Information Processing
   and Business Equipment

- UL 1950, Standard for Safety of Information Technology Equipment

- CSA 22.2 #220, Information Processing and Business Equipment

- CSA 22.2 #950, Safety of Information Technology Equipment

- IEC 380, Safety of Electrically Energized Office Machines

 - IEC 950, Safety of information Technology Equipment Including
   Electrical Business Equipment

- VDE 0805, VDE 0805 TIEL 100, and VDE 0806

- Complies with FCC Class B, Part 15, Subpart J

Error Correction
----------------
The drive uses a Reed-Solomon code to perform error detection and
correction.

For each 512-byte block, the software error correction polynomial is
capable of correcting:
- one error burst up to 22 bits

 - two error bursts up to 11 bits each Single bursts of 11 bits or
   less are corrected on the fly (OTF) with no performance
   degradation.

Conner has established a Universal Translate Mode which enables you
to configure the drive in an AT environment to any cylinder, head,
and sector configuration desired. The translate configuration is
limited by the maximum capacity of the drive and host system
parameters. Upon initial power-up of the drive, it will default to
the configuration.

Signal Levels
-------------
All signal levels are TTL compatible. A logic "1" is >2.0 Volts. A
logic "0" is from 0.00 Volts to 0.70 Volts.

Execute Device Diagnostics
--------------------------
Command Number: 90 hex
Description: This command performs the internal diagnostic tests
implemented by the drive. The diagnostic tests are only executed upon
receipt of this command.

The drive sets BSY immediately upon receipt of the command. If the
drive is a master, the drive performs the diagnostic tests and saves
the results. It then checks to see if a slave drive is present and
waits up to 5 seconds for the slave to complete its diagnostics. If
the slave successfully completes its diagnostics, it asserts -HOST
PDIAG. If unsuccessful, the master drive resets BSY in the Status
register and generates an interrupt. The Error bit (ERR) is set in
the Status register and the Error register is updated.
The value in the Error register should be viewed as a unique 8-bit
code and not as the single-bit flags defined previously. The
interface registers are set to initial values except for the Error
register.

Error Code
01 hex No error detected
02 hex Format device error
03 hex Sector buffer error
8x hex Slave drive failed

Additional codes may be implemented at the manufacturer's option.

Note: If the slave drive fails diagnostics, the master drive
shall "OR" 80 hex with its own status and load that code into the
Error register. If the slave drive passes diagnostics or there is no
slave drive connected, the master drive shall set bit 7 of the Error
register in the Task File to 0.













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