M K - 2 7 2 0 F C TOSHIBA
Native| Translation
------+-----+-----+-----
Form 2.5"/SUPERSLIMLINE Cylinders 2920| | |
Capacity form/unform 1296/ MB Heads 10| | |
Seek time / track 13.0/ 3.0 ms Sector/track | | |
Controller IDE / ATA2 FAST/ENHA Precompensation
Cache/Buffer 128 KB READ-AHEAD Landing Zone
Data transfer rate 5.000 MB/S int Bytes/Sector 512
16.600 MB/S ext PIO1
Recording method PRML 8/9 operating | non-operating
-------------+--------------
Supply voltage 5 V Temperature *C 5 55 | -20 60
Power: sleep 0.2 W Humidity % 8 80 | 8 80
standby 0.4 W Altitude km -0.300 3.000| -0.400 15.000
idle 1.8 W Shock g |
seek 4.5 W Rotation RPM 4200
read/write 3.4 W Acoustic dBA 36
spin-up 7.5 W ECC Bit 168BIT,ON THE FLY
MTBF h 300000
Warranty Month
Lift/Lock/Park YES Certificates CSA,TUV,UL1950
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L A Y O U T
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TOSHIBA MK2720FC PRODUCT SPECIFICATION 71Y102821 20/07/1995
+-J2 MASTER/SLAVE
43--------------------------------------------+1+-+
|* * * * * * * * * * * * * * * * * * * * * * *|*|*|
---+* * * * * * * * * * * * * * * * * * * * * *|*|*+-----
44-----------------------+--------------------+2+-J1 RESERVED
| +-+
Polarity Key
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J U M P E R S
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TOSHIBA MK2720FC PRODUCT SPECIFICATION 71Y102821 20/07/95
Jumper Setting
==============
Master/Slave Configuration
--------------------------
By using the CSEL pin (PIN 28) and the optional jumper J2 beside the
interface connector, two units can be connected on a cable in a daisy
chain.
When J2 is open, the drive runs as master drive. When J2 is closed,
it acts as slave drive. In
In case of two drive connection, one should be a master and another
should be a slave. In case of single drive connection, it should be
defined as master.
Both master and slave drive are allocated onto same I/O area and
identified by Drive bit in DRVH register. Host system writes into
register on both drives but reads register only from a selected
drive.
Only the selected drive can execute the command except Diagnose
command. Diagnose is executed on both drives and the result of slave
drive is transferred to master drive through PDIAG line. Master
drive reports both results to host system.
Interface Pin 28 -CSEL
----------------------
Same function as Option Jumper J2 is provided onto this line.
Definition of Master/Slave should be done either by this pin or J2.
If J2 is plugged for Master, this line does not affect to the
definition. This selection is done by Toshiba Specific command.
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I N S T A L L
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TOSHIBA MK2720FC PRODUCT SPECIFICATION 71Y102821 20/07/1995
Notes On Installation
=====================
Installation
------------
The drive should be mounted carefully on the surface of 0.1 mm
flatness or less to avoid excessive distortion. It is recommended
the space greater than 1 mm is kept under the PCB and it is important
to check enough for safe design to prevent short- circuit under any
circumstances. Enough room to avoid any mechanical interference
when receiving shock or vibration is required especially around the
convex portion in the HDA. The temperature of the top cover and the
base must be kept under 60*C at any moment to maintain the desired
reliability.
The M3 mounting screw holes are tapped directly on the aluminium
portion of HDA for electrical ground. The other are tapped on the
plastic portion for electrical insulation. Screw holes for mounting
can be determined by the evaluation results of the electromagnetic
noise emitted from the host system to drive. The breathing hole
should be kept open after mounting. A maximum force of 2N should be
allowed on the top cover to avoid the drive damage.
Screwing
--------
Four screws should be tightened equally with 0.3N.m (3 kgf.cm)
torque. The depth should be 3.0 mm min. 3.5mm maximum.
Cable Connection
----------------
+------------------------+---------------------------------------+
|Interface Connector | |
|Drive side connector | Yamaichi GAP050K11617 |
+------------------------+---------------------------------------+
Cable
Twisted pair type cable is recommended as follows:
Standard diameter 0.32mm (28 AWG)
Characteristic impedance 100-132
Cable length and capacitance
0.46 MAX. 35pF MAX.
Grounding
---------
HDA (Head Disk Assembly) and DC ground (ground pins on interface)
are electrically connected each other.
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F E A T U R E S
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TOSHIBA MK-2720FC PRODUCT SPECIFICATION 71Y102821 20/07/1995
General Description
-------------------
The MK2720FC comprises a series of intelligent disk drives,
hereinafter referred to as the MK2720FC or simply as the drive.
The drive features an ATA-2 interface embedded controller that
requires a simplified adapter board for interfacing to an AT or AT
compatible bus. The drives employ Winchester technology and a cloosed
loop servo control system to realize recording density of 711kbit/
mm (459 Mbit/inch ) and average access time of 13 msec with highest
reliability of 300,000 hours for MTTF (Mean Time to Failure).
It features smallest and lightest drive with 19mm height half foot-
print of market standard 3.5" type micro FDD and 220 grams of weight.
The MK2720FC consists of an HDA (Head Disk Assembly) and a printed
circuit board. The HDA is a sealed module and contains a disk
spindle assembly, a head actuator assembly and an air filtration
system. Reliability is enhanced through the use of Winchester
technology. The actuator is a rotary voice coil motor and provides
high-speed access.
The disk is driven directly by a DC spindle motor. Air filtration is
provided by means of a high performance air filtration system using
both breather and circulation filters.
The drive provides a carriage lock mechanism which is activated
automatically upon power is down, thus preventing head/media damage
during non-operating or transportation conditions.
The printed circuit board is located externally to the HDA and
contains all the electric circuitry necessary to operate the drive
except the head drivers. This board contains the power supply and
interface signal connectors. Only the head control IC's are located
within the HDA. The circuitry perform the following functions:
Read/Write, Task File Control, Spindle Motor Control, Seek and Head
Positioning Servo Control, Abnormal Condition Detection and Shock
Sensor Control.
Some Key Features
-----------------
- Quick spin up of Spindle Motor 5sec.
- Average access time of 13 msec realized by optimized balance of a
heead actuator assembly and an efficiently designed magnet of
Rotary VCM.
- Read ahead cache and write cache enhancing system throughput.
- Fail-safe power down return heads to landing zone with automatic
carriage lock realized high immunity to operating shock 2,000 m/s .