S T 9 5 4 6 A M A R A T H O N 5 4 1 SEAGATE
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 2.5"/SUPERSLIMLINE Cylinders | 1047| 523| 1024
Capacity form/unform 540/ MB Heads 6| 16| 32| 16
Seek time / track 16.0/ ms Sector/track | 63| 63| 63
Controller IDE / ATA2 FAST/ENHA Precompensation
Cache/Buffer 120 KB LOOK-AHEAD Landing Zone
Data transfer rate 10.000 MB/S int Bytes/Sector 512
16.600 MB/S ext PIO4
Recording method ZBR PRML operating | non-operating
-------------+--------------
Supply voltage 5 V Temperature *C 5 50 | -40 65
Power: sleep W Humidity % 8 80 |
standby 0.4 W Altitude km -0.300 3.048| 12.000
idle 1.3 W Shock g 10 | 250
seek 2.1 W Rotation RPM 4500
read/write W Acoustic dBA 30
spin-up W ECC Bit ON THE FLY
MTBF h 300000
Warranty Month
Lift/Lock/Park YES Certificates FCC
**********************************************************************
L A Y O U T
**********************************************************************
SEAGATE ST9546A PRODUCT MANUAL 36329-101 REV. A 9/1995
+---------------------------------------------------------+
| |XX
| |XX 44-pin
| |XX I
| |XX N
| |XX T
| |XX E
| |*X R
| |XX F
| |XX A
| |XX C
| |XX E
| |XX1
| |+-+
+---------------------------------------------------------++-+
Master/
Slave
**********************************************************************
J U M P E R S
**********************************************************************
SEAGATE ST9546A PRODUCT MANUAL 36329-101, REV. A, 9/1995
Jumper Setting
==============
Master/Slave selection
----------------------
Interface J1 Jumper
+-------------------------------------------+ +------+
|o o o o o o o o o o o o o o o o o o o o o 1| | A C |
|o o o o o o o o o o o o * o o o o o o o o o| | B D |
44------------------------------------------+ +------+
---------------------------------------------------------PWA------
Pin 41 +5VDC
Pin 42 +5VDC
Pin 43 GND
Pin 44 Reserved
Drive uses +5VDC power supplied to the drive via the interface
connector. The drive does NOT make use of a +12VDC power line.
Pin-20 removed for keying
Jumper for Pins Configuration
|A and B | C and D
+--------+---------------------------------------------------------
|OPEN | OPEN Drive is Master, no Slave present
+--------+---------------------------------------------------------
|CLOSED | OPEN Drive is Master, Seagate Slave drive present
+--------+---------------------------------------------------------
|OPEN | CLOSED Drive is Slave to another Seagate 2.5" Master
+--------+---------------------------------------------------------
|CLOSED | CLOSED Cable Select
+--------+---------------------------------------------------------
Master/slave configuration
--------------------------
You must establish a master/slave relationship between two drives
attached to a single AT bus. You can configure a drive to become a
master or slave by setting the master/slave jumpers.
Alternatively, you can configure the drive as a master or slave using
the cable select option. This requires a specialized daisy-chain
cable that grounds pin 28 (CSEL) on one of its two drive connectors.
If you attach the drive to the grounded CSEL connector, it becomes a
master. If you attach the drive to the ungrounded CSEL connector, it
becomes a slave. To use this option, the host system and both drives
must support cable select and both drives must be configured for
cable select. To configure a Marathon 541 for cable select, install
both master/slave jumpers.
For the host to recognize the slave drive using the DASP- signal, the
slave drive must assert the DASP- signal at power up, and the master
drive must monitor DASP- at power up.
Remote LED configuration
------------------------
The drive indicates activity to the host through the DASP- line (pin
39) on the ATA interface. This line may be connected to a drive
status indicator driving an LED at 5V. The line has a 30 mA nominal
current limit. To avoid potential damage to the drive, the host
should include a resistor in line with the LED for current limiting.
This resistor should have a minimum resistance of 470 ohms (1,000 to
3,000 ohms is recommended).
**********************************************************************
I N S T A L L
**********************************************************************
SEAGATE ST9546A PRODUCT MANUAL 36329-101 REV. A, 9/1995
Notes on installation
=====================
Installation direction
----------------------
horizontally vertically
+-----------------+ +--+ +--+
| | | +-----+ +-----+ |
| | | | | | | |
+-+-----------------+-+ | | | | | |
+---------------------+ | | | | | |
| | | | | |
| | | | | |
+---------------------+ | +-----+ +-----+ |
+-+-----------------+-+ +--+ +--+
| |
| |
+-----------------+
The drive will operate in all axis (6 directions).
Drive mounting and configuration
--------------------------------
Handling and static-discharge precautions
After unpacking, and before installation, the drive may be exposed to
potential handling and ESD hazards. Observe standard static-discharge
precautions. A grounded wrist strap is preferred. Handle the drive
only by the sides of the head/disc assembly. Avoid contact with the
printed circuit board, all electronic components and the interface
connector. Do not apply pressure to the top cover. Always rest the
drive on a padded antistatic surface until you mount it in the host
system.
Drive mounting
--------------
You can mount the drive in any orientation. Allow a minimum clearance
of 0.030 inches (0.76 mm) around the entire perimeter of the drive
for cooling. The drive conforms to the industry-standard MCC
direct mounting specifications and requires MCC-compatible connectors
for directmounting applications.
NOTE
The I/O connector pins may extend up to 0.010 inches beyond the edge
of the head/disc assembly.
Caution
To avoid damaging the drive:
- Use M3X0.5 metric mounting screws only.
- Do not insert mounting screws more than 0.150 inches (3.81 mm) into
the mounting holes.
- Do not overtighten the screws (maximum torque: 3 inch-lb).
ATA interface connector
-----------------------
The drive connector is a 44-conductor connector with 2 rows of 22
male pins on 0.079-inch (2-mm) centers.
The mating cable connector is a 44-conductor, nonshielded connector
with 2 rows of 22 female contacts on 0.079-inch (2-mm) centers. The
cable connector should provide strain relief and should be keyed with
a plug in place of pin 20.
These drives are designed to support the industry-standard MCC
direct mounting specifications. When installing these drives in fixed
mounting applications, use only MCC-compatible connectors such as
Molex part number 87368-442x. For applications involving flexible
cables or printed circuit cables (PCCs), use Molex part number
87259-4413 or equivalent to connect the drive to the system.
Select a connector that provides adequate clearance for the
master/slave configuration jumpers if the application requires the
use of such jumpers. The ATA interface cable should be no more than
18 inches long.
NOTE
The I/O connector pins may extend up to 0.010 inches beyond
the edge of the head/disc assembly.
**********************************************************************
F E A T U R E S
**********************************************************************
SEAGATE ST9546A PRODUCT MANUAL 36329-101, REV. A, 9/1995
Introduction
------------
The Marathon 541 (ST9546A) provides high storage capacity in a small,
low-profile hard disc drive.
Key features:
- Low power consumption
- Compact, MCC-compatible form-factor
- Quiet operation
- Advanced partial response, maximum likelihood (PRML) read channel
- Supports logical block addressing
- Supports PIO modes 0, 1, 2, 3 and 4, and DMA modes 0, 1 and 2.
- High instantaneous data-transfer rates (up to 16.6 Mbytes per
second using PIO mode 4 and DMA mode 2).
- Fast microprocessor for lower command overhead
- 120KB multisegmented adaptive cache
- Advanced caching and On-the-Fly error correction algorithms
- Supports Read Multiple and Write Multiple commands
- Supports autodetection of master/slave drives using cable select
and DASP- signals.
Seek time
---------
All seek times are measured using a 25 MHz 486 AT computer (or
faster) with a 8.3 MHz I/O bus. The measurements are taken with
nominal power at sea level and 25*C ambient temperature. The
specifications in the table below are defined as follows:
- Track-to-track seek time is an average of all possible single-track
seeks in both directions.
- Average seek time is a true statistical random average of at least
5,000 measurements of seeks between random tracks, less overhead.
- Full-stroke seek time is one-half the time needed to seek from
the first data cylinder to the maximum data cylinder and back to
the first data cylinder. The fullstroke typical value is
determined by averaging 100 fullstroke seeks in both directions.
Power specifications
--------------------
The drive receives DC power (+5V) through pin 41 and pin 42 of the
ATA interface connector.
Power consumption
-----------------
Typical power measurements are based on an average of drives tested
under nominal conditions, using 5.0V input voltage at 25*C ambient
temperature at sea level.
Active mode current and power are measured with a 32msec delay
between each operation and the drive in default logical geometry.
Seeking power and currents are measured during one-third-stroke
buffered seeks.
Read/Write power and current are measured with the heads on track,
based on a 16-sector write followed by a 32msec delay, then a
16-sector read followed by a 32msec delay.
Spinup power is measured from time of power-on to time of drive-ready
for normal operation.
Power Recovery
--------------
Except during execution of a write command, the drive's power can be
interrupted without adversely affecting the drive or previously
written data. If power is removed while the drive is performing a
write operation, the integrity of the data being written cannot be
guaranteed.
Conducted noise
---------------
- The drive is expected to operate with a maximum of:
150 mV peak-to-peak triangular-wave injected noise at the power
connector. The frequency is 10 Hz to 100 KHz with equivalent
resistive loads.
- 100 mV peak-to-peak triangular-wave injected noise at the power
connector. The frequency is 100 KHz to 10 MHz with equivalent
resistive loads.
NOTE
Equivalent resistance (11.9 ohms) is calculated by dividing the
nominal voltage (5.0V) by the typical RMS read/write current (0.420
amps).
Voltage Tolerance
-----------------
Voltage tolerance (including noise): +5 volts + 5% - 10%
Power-management modes
----------------------
Power management is required for lowpower and portable computer
systems. In most systems, you can control power management through
the system setup program. This Seagate drive features several
power-management modes, which are described briefly below:
Active mode
The drive is in Active mode during the read/write and seek
operations.
Idle mode
At power-on, the drive sets the idle timer to enter Idle mode
after 5 seconds of inactivity. You can set the idle timer delay using
the system setup utility. In Idle mode, the spindle remains up to
speed. The heads are parked away from the data zones for maximum data
safety.
The buffer remains enabled, and the drive accepts all commands and
returns to Active mode any time disc access is necessary.
Standby mode
The drive enters Standby mode when the host sends a Standby Immediate
command. If the host system sets the standby timer, the drive can
also enter Standby mode automatically after the drive has been
inactive for a specifiable length of time. The standby timer delay is
system dependent and is usually established using the system setup
utility. In Standby mode, the buffer remains enabled, the heads are
parked and the spindle is at rest. The drive accepts all commands and
returns to Active mode any time disc access is necessary.
Sleep mode
The drive enters Sleep mode after receiving a Sleep Immediate command
from the host. The heads are parked and the spindle is at rest. The
drive leaves Sleep mode when it receives a Hard Reset or Soft Reset
command from the host. After receiving a soft reset, the drive exits
Sleep mode and enters Standby mode with all current emulation and
translation parameters intact.
Idle and standby timers
The drive sets the default time delay for the idle timer at power-on.
In most systems, you can set this delay using the system setup
utility. Each time the drive performs an Active function (read, write
or seek), the idle and standby timers are reinitialized and begin
counting down from their specified delay times to zero. If the idle
timer reaches zero before any drive activity is required, the drive
enters Idle mode. If the host has set the standby timer, the standby
countdown continues. If the host has not set the standby timer, the
drive remains in Idle mode. If the standby timer reaches zero before
any drive activity is required, the drive enters Standby mode. In
both Idle and Standby mode, the drive accepts all commands and
returns to Active mode when disc access is necessary.
Shock
-----
All shock specifications assume that the drive is mounted in an
approved orientation with the input levels at the drive mounting
screws. The nonoperating specifications assume that the read/write
heads are positioned in the shipping zone.
NOTE
At power-down, the read/write heads automatically move to the
shipping zone. The head and slider assembly park inside of the
maximum data cylinder. When power is applied, the heads recalibrate
to Track 0.
Operating shock
---------------
This drive can withstand a maximum operating shock of 10 Gs without
nonrecoverable data errors (based on half-sine shock pulses of 2 or
11 msec).
Nonoperating shock
------------------
The nonoperating shock level that the drive can experience with
complete data recovery is 250 Gs (based on half-sine shock pulses of
2 msec duration) or 150 Gs (based on half-sine shock pulses of 11
msec duration). Shock pulses are defined by MIL-STD-202 F with the
amplitude tolerance controlled to 5%.
Vibration
---------
All vibration specifications assume that the drive is mounted in an
approved orientation with the input levels at the drive mounting
screws.
The nonoperating specifications assume that the read/write heads are
positioned in the shipping zone.
Agency certification
--------------------
Safety certification
The Marathon 541 is listed in accordance with UL 1950 and CSA C22.2
(950-M89) and meets all applicable sections of IEC 380, IEC 435,
IEC 950, VDE 0806/08.81 and EN 60950 as tested by TUV-Rheinland,
North America.
FCC verification
----------------
The Marathon 541 is intended to be contained solely within a personal
computer or similar enclosure (not attached to an external device).
As such, each drive is considered to be a subassembly even when it is
individually marketed to the customer. As a subassembly, no Federal
Communications Commission authorization, verification or
certification of the device is required.
Seagate Technology, Inc. has tested this device in enclosures as
described above to ensure that the total assembly (enclosure, disc
drive, motherboard, power supply, etc.) does comply with the limits
for a Class B computing device, pursuant to Subpart J of Part 15 of
the FCC rules.
Operation with noncertified assemblies is likely to result in
interference with radio and television reception.
Radio and television interference. This equipment generates and
uses radio frequency energy and if not installed and used in strict
accordance with the manufacturer's instructions, may cause
interference to radio and television reception.
This equipment is designed to provide reasonable protection against
such interference in a residential installation. However, there is no
guarantee that interference will not occur in a particular
installation. If this equipment does cause interference to radio or
television, which can be determined by turning the equipment on and
off, you are encouraged to try one or more of the following
corrective measures:
- Reorient the receiving antenna.
- Move the device to one side or the other of the radio or TV.
- Move the device farther away from the radio or TV.
- Plug the computer into a different outlet so that the receiver and
computer are on different branch outlets.
If necessary you should consult your dealer or an experienced radio/
television technician for additional suggestions. You may find
helpful the following booklet prepared by the Federal Communications
Commission: How to Identify and Resolve Radio-Television
Interference Problems. This booklet is available from the Super-
intendent of Documents, US Government Printing Office, Washington, DC
20402. Refer to publication number 004-000-00345-4.
ATA interface
-------------
The Marathon 541 uses the industry-standard ATA interface. It
supports both 8-bit and 16-bit data transfers. It supports ATA
programmed input/output (PIO) modes 0, 1, 2, 3 and 4, ATA single-
word DMA modes 0, 1 and 2, and ATA multiword DMA modes 0, 1 and 2.
The drive also supports the use of the IORDY signal to provide
reliable high-speed data transfers.
The drive can differentiate between a hard reset and a soft reset
while in Sleep mode. You can use a daisy-chain cable to connect two
drives to a single AT host bus. For detailed information regarding
the ATA interface, refer to the Proposed Working Draft of the ATA-2
Draft Proposed American National Standard, document X3T9.2/948D
(sub-sequently referred to as the Draft Proposed ATA-2 Standard).
ECC testing
-----------
When a Marathon 541 performs hardware-based ECC error correction
On-the-Fly, the drive does not report an ECC error. This allows ECC
correction without degrading drive performance. Some older drive
diagnostic programs test ECC features by creating small data errors
and then checking to see if they are reported. These tests, when run
on a Marathon 541, may incorrectly report an ECC detection failure
because the drive hardware corrects the data automatically, avoiding
the error rather than reporting it. This type of report does not
indicate a drive malfunction.