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Hard Drive: DAEYOUNG: DX-3120A 120MB 3.5"/SL IDE / AT

D X - 3 1 2 0 A    DAEYOUNG
NO MORE PRODUCED                                      Native|  Translation
Form                 3.5"/SLIMLINE         Cylinders        |  866|     |
Capacity form/unform   120/  135 MB        Heads           4|    8|     |
Seek time   / track  19.0/ 2.0 ms          Sector/track     |   34|     |
Controller           IDE / AT              Precompensation
Cache/Buffer            32 KB STATIC RAM   Landing Zone
Data transfer rate    0.625 MB/S int       Bytes/Sector      512
                      1.000 MB/S ext
Recording method     RLL 1/7                        operating  | non-operating
Supply voltage     5/12 V       Temperature *C                 |
Power: sleep              W     Humidity     %                 |
       standby            W     Altitude    km                 |
       idle           8.9 W     Shock        g                 |
       seek           9.2 W     Rotation   RPM      3600
       read/write    10.4 W     Acoustic   dBA
       spin-up            W     ECC        Bit   32
                                MTBF         h     100000
                                Warranty Month
Lift/Lock/Park     YES          Certificates                                  



  |                                                               |
  |                                                               |
  |                                                               |
  ||+--J6---++-------------J5------------------------+  +--J1---+||
  |||o o o o||o o o o o o o o o o o o o o o o o o o 1|  |1 2 3 4|||
  |||o o o o||o o o o o o o o o o   o o o o o o o o o|  | Power |||
     | | | |  40-pin AT-Bus Interface Connector
     | | | |
     | | | +-- MASTER
     | | +---- SLAVE
     | +------ SELF TEST
     +-------- SPARE



Jumper Setting

Address Assignments
An individual drive may have a logical address of 0 or 1. Drive 0 is
the only drive for single drive installations. For dual drive
installations, drive 0 is the MASTER drive and drive 1 is the SLAVE
drive. The jumper block connector determines the drive logical

Single Drive Installation
The jumper block connector needs NO jumpers for a single drive

Dual Drive Installation
For a dual drive installation, one drive must be the master and one
must be the slave. Installing a jumper on pin pair Master selects the
Master drive. This selects logical drive 0 (C:). Installing a jumper
on pin pair Slave selects the SLAVE drive. Slave selects logical
drive 1 (D:). Either drive can be a master or a slave. There cannot
be 2 masters or 2 slaves. The position of the master and the slave
drive on the interface cable, is not important. The jumper block
should have only one jumper installed per drive.

Commands and data information passes on the common 40-pin AT/IDE
cable. This information is present to both hard disk drive. This
places a requirement to discriminate between the two drives. You must
use the DRV bit in the drive/head (DH) register when issuing commands
to the drives.

 +--------------+ Interface J5      +--------------+
 |AT/IDE        +------------+  +---+Jumper=MASTER |
 |HOST ADAPTER  |            |  |   |Master C:     |
 |  ++    +-----+            +--+---+DX-3120A      |
 +--++----+                  |  |   +--------------+
 +--------------+ Power J1   |  |
 |Power Supply  +------------+--+   +--------------+
 |+12 & +5 VDC  +------------+------+Jumper=SLAVE  |
 +--------------+            |      |Slave D:      |
                             +------+DX-3120A      |



Notes on Installation

Installation direction

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

The drive may mount in any position. There are ten mounting holes
provided in the drive chassis for installation. Ten of these holes
accept 6-32 machine screws. Beadly warped or nonplanar mounting
surfaces may distort the drive.

Up to two DX-3120A drives may be cabled to a single CPU/host adapter.
They can be configured as master or slave. Power to the drives may be
from a common power bus. The AT/IDE Task File intelligent drive
interface may require a host adapter board. The host adapter allows
installation of the drive in motherboards that do not an embedded
AT/IDE interface.

AT/IDE Cable Connections
Cable connection between the host adapter or the host system should
use 28 AWG stranded flat cable, or equivalent. The cable length
should not exceed 2 feet.

Drive and Host Adapter Installation
Before installing the hard disk, you must first disconnect your AT
computer system from AC power outlets. Remove the cover to the AT
computer system.

The DX-3120A needs six 6-32 screws to mount the drive. The drive
mounts with the threaded holes on the bottom or sides. If needed, the
AT-style side-mount rails attach to the Daeyoung 5.25" mounting
brackets. Select screw length that limit screw penetration into the
mounting brackets to 0.13 inches (3.3 mm) max.

In many new AT system cases 3.5" internal mounting options are
available. Some AT case designs, need AT-style side-mount rails.

Embedded AT/IDE systems don't need the PC/AT host adapters.
Non-embedded AT/IDE systems need a host adapter.

Host Adapter Configuration
The PC/AT host adapters integrate AT compatible computer systems with
AT/IDE interface hard disk drives. The host adapters require a 16-bit
slot in the PC/AT or compatible system. The adapter board buffers the
drive from the host and does the address decoding. The adapter board
decodes the host I/O addresses 1F0 - 1F7 and 3F6 - 3F7. The disk
drive uses these addresses in the AT BIOS. The floppy disk drive
also responds to address 3F7, bit 7. The drive does not send bit 7.
Most host adapters are not compatible with 8-bit bus XT computer

A host adapter can interface up to two AT/IDE hard disk drives. The
host adapter also controls up to two floppy disk drives. Support of
the floppy combinations must be in the system BIOS. The combinations
are 3.5" (720 KB or 1.44 MB), or 5.25" (360 KB or 1.2 MB). There are
two ways to support more than two floppy drives, on line in your
system. You must use another floppy disk controller card with on-
board BIOS, or a special software driver.

Cabling and Hardware Installation
Unplug the system from AC outlets on the motherboard.
Motherboards with an embedded AT/IDE interface cannot use a host
adapter board. You must attach the 40-pin hard disk cable correctly
to the 40-pin connector on the system motherboard. Pin 1 (red stripe)
of the cable must match pin 1 of the 40-pin motherboard connector.
Pin 1 of the disk drive (J5) connector must match pin 1 of the cable.
Make sure that you insert a power connector from the computer
system's power supply. Plug it into the power receptable at the rear
of the DX-3120A disk drive.

Hard Disk Systems needing a PC/AT host adapter
Install the host adapter in any any available 16-bit slot in the
computer system. Attach one end of the 40-pin hard disk drive cable
to the 40-pin connector on the host adapter. Make sure pin 1 (red
stripe) of the cable matches pin 1 of the 40-pin connector.

Insert either of the two hard disk drive connectors at the other end
of the 40-pin cable into the 40-pin connector on the PC board at the
rear of the disk drive. Make sure pin 1 (red stripe) of the cable
matches pin 1 of the 40-pin connector. The cable inserts only one
way, see the cable key for the disk drive. Insert an available power
connector from the computer system's power supply into the power
receptable at the rear of the DX-3120A disk drive.

For daisy-chain installations, make sure that both hard disk drives
connect to the 40-pin cable. The physical placement of master of
slave does not matter. Master or slave can attach to either available
hard disk connector. The drive are selected by the master and slave
jumpers on the jumper block. Be sure that both hard disk drives
connected to available power connectors from the computer system's
power supply.

Floppy Drive Installation
Attach the cable mount socket of the 34-pin floppy cable to the
34-pin connector on the host adapter. Make sure that pin 1 (red
stripe) of the cable connector matches pin 1 of the host adapter 34-
pin connector. Follow the floppy drive instructions for setting the
terminating resistors and jumpers on the floppy drive. Floppy drive A
attaches to the end of the cable with the twisted conductors. Floppy
drive B attaches to the connector at the middle of the cable without
the twist in the conductors. Plug the card edge cable connectors into
the floppy drives. Decide the proper pin 1 orientations. Be sure that
available power connectors from the computer system's power supply
insert in the drive power receptacles.

Other Connectors on the PC/AT host adapters
Most host adapters have a LED header to show hard disk drive
activity. Connect the cable from the front panel LEDs of the computer
system to the host adapter LED header.



The DX-3120A Winchester disk drive is a storage device for a computer
system with the industry standard PC/AT or AT/IDE interface. The DX-
3120A is a compact, lightweight, high capacity, and reliable disk

General Description
The DX-3120A has a formatted capacity of 120 MB. It uses a rotary
band positioner driven by a bipolar stepper motor. The disk drive
operates under the control of a microprocessor to position the read/
write heads. The head positioning mechanism design assures that the
thermal loops of the positioning system oppose each other. This re-
sults in extremely accurate head positioning over the entire
operating range.

The DX-3120A has a magnetic fluid seal. This eliminates spindle motor
bearing contamination. The recirculation filter at the periphery of
the disks efficiently cleans the head/disk assembly (HDA) air. The
filter traps entrained particles.

A single pronted circuit board (PCB) mounted beneath the HDA contains
the electronics of the DX-3120A. The electronics accomplish the
following functions:

Provide on-board disgnostics
Position the read/write heads
Read and write data
Interpret and generate control signals
Maintain the correct spindle motor speed

 Seek Time
       |                                  |DX-3120A|
       |Track-to-Track         msec. typ. |   2.04 |
       |Average                msec. typ. |  19    |
       |                       msec. max. |  30.68 |
       |One-Third Stroke       msec. max. |  17.86 |
       |Latency                msec. avg. |   8.33 |

Drive Formatting
The low level format is factory-writern. The DX-3120A drive uses
cylinder/head skewing to improve data throughput performance. The
format and skewing features of the drive are transparent to the user.
Altering the Format during use is not possible.

Drive Diagnostic
This command executes the internal diagnostic tests implemented by
the drive. The diagnostic tests only execute upon the receipt of the
command. Drive BSY sets immediately upon receipt of the command. If
the drive is a mster with jumper block pin pair master jumpered, the
drive performs the diagnostic tests and saves the results. Then it
checks to see if a slave drive is present. The master then waits for
5 seconds for the slave to complete its diagnostics.

If the slave completes the diagnostics successfully, it asserts -HOST
PDIAG. If unsuccessful, it sets its error register as described

 Code |Error Description
  01  |No error detected
  02  |Formatter device code
  03  |Sector buffer error
  04  |ECC circuitry error
  05  |Controlling Microprocessor error
  8X  |Slave drive failed

Error Register
This register contains status from the last command executed by the
drive a Duagnostic Code. At the completion of any command except
Execute Drive Diagnostic, the contents of this register are valid
when ERR = 1 in the Status register.

Bit definition of the error resister

   7  | 6  | 5  | 4  | 3 |  2  | 1  | 0
  BBK |UNC | 0  |IDNF| 0 |ABRT |TK0 |AMNF

BBK (Bad Block Detected)
indicates that a bad block mark was detected in the requested sectors
ID field.

UNC (Uncorrectable Data Error)
indicates an uncorrectable data error has been encountered.

IDNF (ID Not Found)
indicates the requested sector's ID field could not be found.

ABRT (Aborted Command)
indicates the requested command has been aborted due to a drive
status error or an invalid command.

TK0NF (Track 0 Not Found)
indicates "track 0 not found" during a Recalibrate command.

AMNF (Address Mark Not Found) indicates the data address mark not
found, after finding the correct ID field.

0 (Not used)
These bits are 0.

DOS high level format
Universal Translation: Any combination up to 120 MB not exceeding
234640 512 bytes sectors.

The setup type is 47 or 48 in most system setup BIOS. The parameters
for custom setup are: 866 cylinder, 8 heads, 34 sectors.

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