Hard Drive: MAXTOR: 25252A 251MB 2.5"/SSL IDE / AT
2 5 2 5 2 A MAXTOR
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 2.5"/SUPERSLIMLINE Cylinders 1418| 569| |
Capacity form/unform 251/ MB Heads 6| 16| |
Seek time / track 12.0/ 2.5 ms Sector/track | 54| |
Controller IDE / AT Precompensation
Cache/Buffer 128 KB Landing Zone
Data transfer rate 2.000 MB/S int Bytes/Sector 512
9.000 MB/S ext
Recording method RLL 1/7 operating | non-operating
-------------+--------------
Supply voltage 5 V Temperature *C 5 50 | -40
Power: sleep 0.1 W Humidity % |
standby 0.1 W Altitude km -0.061 3.048|
idle 0.9 W Shock g 15 | 150
seek 1.6 W Rotation RPM 4247
read/write 2.0 W Acoustic dBA 30
spin-up 2.8 W ECC Bit REED SOLOMON,WITH 11BIT BU...
MTBF h 350000
Warranty Month 12
Lift/Lock/Park YES Certificates CSA,FCC,TUV,UL478,VDE
Layout
MAXTOR 25252A/25084A PRODUCT MANUAL PART #1227 P3
+---------------------------------------------------------+ | | | 42XX 5V | |XX | |XX I | |XX N | |XX T | |XX E | 20.X R | S302 |XX F | | |XX A | S301+-+-+-+-+S304 |XX C | +-+-+-+-+ |XX E | | |X1 | S303 AxxD Test | | +---------------------------------------------------------+
+----------------------------------------------------------+
| |
| +Pin 41 +5V Supply |
| +--+-----------------------------------------------+ |
| +-+++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+--+ |
| | |.|.|.|.|.|.|.|.|.|.|.|.|.|.|.|.|.|.|.|.|1| |.| A| |
| | |.|.|.|.|.|.|.|.|.|.|.| |.|.|.|.|.|.|.|.|.| |.| D| |
| +-+++-+-+-+-+-+-+-+-+-+-+++-+-+-+-+-+-+-+-+-+-+-+-++ |
+---+ | 20 Key |+---+
Pin 42 Factory Test Point
+5V Supply
Jumpers
MAXTOR 25252A/25084A PRODUCT MANUAL PART #1227 P3
Jumper Setting ============== +----------------------------------+------+------+------+------+ | |S301 |S302 |S303 |S304 | |Master/Slave | | | | | +----------------------------------+------+------+------+------+ |Only drive in single drive system*|CLOSED| | | | | | | | | | |Master in dual drive system |CLOSED| | | | | | | | | | |Slave in dual drive system |OPEN | | | | +----------------------------------+------+------+------+------+
+----------------------------------+------+------+------+------+ | |S301 |S302 |S303 |S304 | |Reserved for factory | | | | | +----------------------------------+------+------+------+------+ |Normal operation* | | |OPEN |OPEN | | | | | | | |Factory operation | | |CLOSED|CLOSED| +----------------------------------+------+------+------+------+
+----------------------------------+------+------+------+------+ | |S301 |S302 |S303 |S304 | |Idle Mode Latch | | | | | +----------------------------------+------+------+------+------+ |Option Disabled | |OPEN | | | | | | | | | |Option Enabled* | |CLOSED| | | +----------------------------------+------+------+------+------+
* = Default
Install
MAXTOR 25252A/25084A PRODUCT MANUAL PART #1227 P3
Notes of Installation
=====================
Installation direction
----------------------
horizontally vertically
+-----------------+ +--+ +--+
| | | +-----+ +-----+ |
| | | | | | | |
+-+-----------------+-+ | | | | | |
+---------------------+ | | | | | |
| | | | | |
| | | | | |
+---------------------+ | +-----+ +-----+ |
+-+-----------------+-+ +--+ +--+
| |
| |
+-----------------+
The drive will operate in all axis (6 directions).
Recommended Mounting Configuration
----------------------------------
Maxtor 25000 Series drive design allows greater shock tolerance
than that afforded by larger, heavier drives.
The drive may be mounted in any attitude. Allow adequate ventilation
to the drive to ensure reliable operation over the operating
temperature range.
Host Equipment
--------------
Maxtor built hard drives to meet the highest quality standards.
Like all system peripherals, they depend on host equipment for
adequate power and environment in order to realize their full
performance potential and to operate in compliance with applicable
industry and governmental regulations.
Special attention must be given to:
- Safety
- Power distribution
- Shielding
- Audible noise control
- Temperature regulation and
- Electrostatic discharge (ESD).
128K Look-Ahead Cache
---------------------
Caching with look-ahead read decreases access time to sequential data
in the drive by temporarily placing small amounts of data in high
speed memory. To maximize performance, no head switching or seek-
ing occurs during look-ahead.
How Look-ahead Cache Functions
------------------------------
In the absence of an error, corrected data, or an interrupt command,
the drive caches not only requested sectors, but "look-ahead" and
caches all remaining until the cache is full. The "look-ahead"
feature prepares the drive to transfer cached data when the host
request it (preventing access time delays). Commands are interrupt
driven, so if the drive is performing a look-ahead cache when a
command is received, it will stop caching and process the command.
Resets and Write or Write Long commands to any of the cached sectors
invalidate the whole cache. Sector on a track are cached until an
error occurs, until corrected data is read, or until a host command
interrupts the drive.
Air Filtration System
---------------------
All 25000 Series drives are designed to operate in a field or
office environment with minimum environmental control. Over the life
of the drive, a 0.3 micron filter and breather filter (located within
the HDA) maintain a clean environment to the heads and disks.
Read/Write Electronics
----------------------
An integrated circuit mounted within the sealed enclosure (near the
read/write heads) provides one of four head selection (depending on
the model), read preamplification, and write drive circuitry.
Read/Write Heads and Disks
--------------------------
Low-mass, low-force thin film read/write heads record data on 65 mm
diameter disks. Maxtor uses a sputterred thin-film medium, with
glass/canasite substrate on all disks for 25000 Series drives.
Automatic Headpark and Lock
---------------------------
Immediately following power-down, dynamic braking of the spinning
disks delays momentarily allowing the heads move to an inner
mechanical stop. A small magnetic latch holds the heads in place as
the disk spin down. The heads are released only when power is again
applied.
Acoustic Noise
--------------
Averages are recorded during Idle mode.
Sound power (per ISO/DIS 7779) 3.4 belA
Sound Pressure
(1 meter perpendicular to top cover) 30 dBA
Sound Pressure
(seated operator position, per ISO 7779) 32.5 dBA
Drive Mechanism
---------------
A brushless DC direct-drive motor rotates the spindle at 4,247 RPM
( 0.1%). A dynamic brake provides a fast stop to the spindle motor
upon power removal. The speed tolerance includes motor performance
and motor circuit tolerances.
Dual Drive Support
------------------
Two drives may be accessed via a common interface cable, using the
same range of I/O addresses. The drives are jumpered as drive 0 or 1
Master/Slave, and are selected by the drive select bit in the
Drive/Head register of the task file.
All Task File registers are written in parallel to both drives. The
interface processor on each drive decides whether a command written
to it should be executed; this depends on the type of command and
which drive is selected. Only the drive selected executes the command
and activates the data bus in response to host I/O reads; the drive
not selected remains inactive.
A master/slave relationship exists between the two drives: drive 0
is the master, and drive 1 the slave.
Interface Connector
-------------------
All 25000 Series AT drives have a 44-pin interface/power connector
mounted on the PCBA. The drive may connect directly to the host; or
it can also accommodate a cable connection (maximum cable length:
18 inches).
The four separate pins on the interface connector are solely for
factory test purposes and should be left disconnected.
Electrical Description
----------------------
All signal levels are TTL compatible. A logic "1" is > 2.0 volts.
A logic "0" ranges from 0.00 volts to 0.70 volts.
Features
MAXTOR 25252A/25084A PRODUCT MANUAL PART #1227 P3
Introduction
------------
The Maxtor 25000 Series are 2.5-inch ruggedized high-performance AT
interface hard disk drives. Maxtor engineers have applied recent
advances in hard drive technology to the design and manufacture of
the 25000 Series drives; reduced size and increased durability make
them especially well suited to notebook, laptop, and desktop
applications.
Sector Address Translation
--------------------------
25000 Series drives feature a Universal Translate Mode. In an
AT-class system, the drive may be configured to any specified
combination of cylinders, heads and sectors (within the range of the
drive's formatted capacity).
Seek Time
---------
+----------------------------------+--------+
|Track-to-Track msec. typ. | 2.5 |
+----------------------------------+--------+
|Average msec. typ. | 12 |
| msec. max. | 22 |
+----------------------------------+--------+
|Latency msec. avg. | 7.064|
+----------------------------------+--------+
Defect Management
-----------------
The 25252A/25084A have six (6)/two (2) spare sectors per cylinder,
located at the end of each cylinder. Upon detection of a bad sectors
that has been reassigned, the next sequential sector is used.
The first spare sector makes up for the loss of sector 3, and so
maintains the sequential order of data, with 3 spare sectors still
allocated for that cylinder. This push down method assures maximum
performance.
In the rare occurence that the number of reassigned bad sectors
exceeds the number of spare sectors allocated for that cylinder, an
alternate track at the inner diameter of the disk is used. The 25252A
has six (6) alternate tracks and 25084A has two (2)
Error Correction Code
---------------------
The 25252A and 25084A use a Reed-Solomon cde for error detection and
correction. The error correction polynomial can correct one error
burst with a maximum of 11 bits. Individual bursts are corrected
without any resulting performance degradation.
Execute Drive Diagnostics
-------------------------
Commands the drive to implements the internal diagnostics tests.
(These tests are executed only upon command receipt; they do not run
automatically at power up or after a reset.)
The drive sets BSY immediately upon receiving this command.
This table presents the codes and their descriptions:
Note that the value in the Error register should be viewed as a
unique 8 bit Code.
Error Code | Description
-----------+---------------------
01 | no error detected
-----------+---------------------
02 | formatter device error
-----------+---------------------
03 | sector buffer error
-----------+---------------------
04 | ECC circuitry error
-----------+---------------------
05 | controller microprocessor error
-----------+---------------------
8x | slave drive failed
Note: If a slave drive fails diagnostics, the master
drive OR's 80 hex with its own status, and loads that
code into the Error register.
If a slave drive passes diagnostics (or a slave is
absent), the master drive OR's 00 with its own status
and loads that code into the Error register.
General
MAXTOR IDE INSTALLATION
INSTALLATION PROCEDURE FOR AN IDE DRIVE
---------------------------------------
1. Install a 40 pin Data Cable ensuring that pin 1, which can be
identified by the striped edge of the cable, is closest to the
power connector on the drive.
2. Install a DC power cable to the back of the drive.
3. Verify the jumper configurations for Master/Slave operation
(Note: Master will be the bootable drive. The slave will not
be bootable.) Also make sure the existing C: drive is jumped
to be the Master in a two drive system, not the only drive in
the system.
4. Apply power to the computer.
4a. When memory test is complete go into your system's Standard
CMOS set-up.
(Note: There are various ways to get into CMOS set-up, please
refer to system's manual for instructions.)
4b. If your system's BIOS supports a user programmable drive
type, program the BIOS with the default parameters of your
drive. If your system does not support a user programmable
drive type choose parameters that closely match but do not
exceed the drives MegaByte capacity. Escape from set-up
then choose write to CMOS and exit.
5. Boot from a DOS diskette that has FDISK.EXE and FORMAT.COM on
it. At the A> prompt type in FDISK. At the menu options select
option 1 to create a DOS partition. Another menu will appear
and from those options choose 1 to create a Primary DOS
partition. Select yes to make 1 large partition and it will
automatically become active. Then escape from FDISK.
6. At the A> prompt type in FORMAT C:/S This does a high-level
format on the drive and transfers the system files in order for
the drive to be bootable. (Note: IDE drives are low-level
formatted from the manufacturer and only need a high-level
format).
To configure the drive as a slave drive repeat steps 1-4 and
proceed with steps 5a. and 6a. as follows:
5a. At the C> prompt type in FDISK. When the menu options appear
select option 5 to switch to the second drive. Enter fixed
disk drive number 2. Then choose option 1 to create a DOS
partition, then select option 1 again to create a Primary DOS
partition or option 2 to create an Extended DOS partition.
(Note: C and D drives will always be the Primary partitions
but only the Primary partition on C: will have a status of
active).
6a. Proceed with a high-level format on the drive by typing FORMAT
D: (Note: Make sure the correct drive letter has been selected
for format).
7. The drive is now bootable. As a test remove the DOS diskette
from A and press reset to reboot the computer, a C> should be
displayed, the drive is now ready for operation.
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