Seagate ST34321A, Medalist, 8641, 6531, 4321 Product Manual

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Medalist 8641, Medalist 6531

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Medalist 4321, Medalist 3221

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Medalist 2110

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Ultra ATA Interface Drives

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Product Manual

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Medalist 8641, Medalist 6531

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Medalist 4321, Medalist 3221

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Medalist 2110

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Ultra ATA Interface Drives

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Product Manual

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1998, 1999 Seagate Technology, Inc. All rights reserved
Publication Number: 20400075-001, Rev. B, January 1999
Seagate, Seagate Technology, the Seagate logo, Medalist and the

Medalist logo are registered trademarks of Seagate Technology, Inc.
Other product names are registered trademarks or trademarks of their
owners.

Seagate reserves the right to change, without notice, product offerings
or specifications. No part of this publication may be reproduced in any
form without written permission from Seagate Technology, Inc.

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B iii

Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Specification summary table . . . . . . . . . . . . . . . . . . . 2

1.0 Drive specifications . . . . . . . . . . . . . . . . . . . . . . 5

1.1 Formatted capacity . . . . . . . . . . . . . . . . . . . . . 5

1.1.1 Default logical geometry . . . . . . . . . . . . . . . . 5

1.1.2 Supported CHS translation geometries . . . . . . . . 6

1.2 Physical organization . . . . . . . . . . . . . . . . . . . . 6

1.3 Recording and interface technology . . . . . . . . . . . . . 6

1.4 Physical characteristics . . . . . . . . . . . . . . . . . . . 7

1.5 Seek time . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.6 Start/stop times . . . . . . . . . . . . . . . . . . . . . . . 8

1.7 Power Specifications . . . . . . . . . . . . . . . . . . . . 8

1.7.1 Power consumption . . . . . . . . . . . . . . . . . . 8

1.7.2 Conducted noise . . . . . . . . . . . . . . . . . . . . 10

1.7.3 Voltage tolerance . . . . . . . . . . . . . . . . . . . . 10

1.7.4 Power-management modes . . . . . . . . . . . . . . 11

1.8 Environmental tolerances . . . . . . . . . . . . . . . . . . 12

1.8.1 Ambient temperature . . . . . . . . . . . . . . . . . . 12

1.8.2 Temperature gradient . . . . . . . . . . . . . . . . . 12

1.8.3 Humidity . . . . . . . . . . . . . . . . . . . . . . . . 12

1.8.4 Altitude . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.8.5 Shock . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.8.6 Vibration . . . . . . . . . . . . . . . . . . . . . . . . 13

1.9 Drive acoustics . . . . . . . . . . . . . . . . . . . . . . . 14

1.10 Electromagnetic susceptibility . . . . . . . . . . . . . . . 14

1.11 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.12 Agency certification . . . . . . . . . . . . . . . . . . . . 15

1.12.1 Safety certification . . . . . . . . . . . . . . . . . . 15

iv Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

1.12.2 Electromagnetic Compatibility . . . . . . . . . . . . 15

1.12.3 FCC verification . . . . . . . . . . . . . . . . . . . . 15

2.0 Drive mounting and configuration . . . . . . . . . . . . . . 17

2.1 Handling and static-discharge precautions . . . . . . . . . 17

2.2 Jumper settings . . . . . . . . . . . . . . . . . . . . . . . 17

2.2.1 Master/slave configuration . . . . . . . . . . . . . . . 17

2.2.2 Alternate capacity jumper . . . . . . . . . . . . . . . 17

2.3 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . 18

3.0 ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.1 ATA interface signals and connector pins . . . . . . . . . . 21

3.2 ATA Interface commands . . . . . . . . . . . . . . . . . . 23

3.2.1 Supported ATA commands . . . . . . . . . . . . . . . 23

3.2.2 Identify Drive command . . . . . . . . . . . . . . . . 25

3.2.3 Set Features command . . . . . . . . . . . . . . . . 29

3.2.4 S.M.A.R.T. commands . . . . . . . . . . . . . . . . . 30

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B v

Figures

Figure 1. Typical startup and operation current profile . . . . . . . 10

Figure 2. Alternate capacity jumper and master/slave jumpers . . 18
Figure 3. Drive mounting dimensions—top, side and end view . . . 19

Figure 4. I/O pins and supported ATA signals . . . . . . . . . . . 22

vi Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 1

Introduction

This manual describes the functional, mechanical and i nterfac e spec ifi -



cations for the Medalist

8641 (ST38641A), Medalist 6531 (ST36531A),
Medalist 4321 (ST34321A), Medalist 3221 (ST33221A) and Medalist
2110 (ST32110A). These drives are referred to throughout this manual
by their model numbers. These drives provide the following key features:

• Low power consumption

• Quiet operation

• Support for S.M.A.R.T. drive monitoring and reporting

• High instantaneous (burst) data-transfer rates (up to 33.3 Mbytes per

second) using Ultra DMA mode 2

• Full-track multiple-sector transfer capabili ty without local processor

intervention

• 128-Kbyte cache

• State-of-the-art caching and on-the-fly error-correction algorithms

• Support for Read Multiple and Write Multiple commands

• Support for autodetection of master/slave drives that use cable select

(CSEL)

• MR recording heads and PRML technology, which provides the drives

with increased areal density

2 Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

Specification summary table

The specifications listed in this table are for quick reference. For details
on specification measurement or definition, see the appropriate sec tion
of this manual.

Drive
Specification

Guaranteed Mbytes
(×106 bytes)

Guaranteed sectors
Bytes per sector 512
Default sectors per

track 63
Default read/write

heads 16 15 15 16 16
Default cylind ers 16,383 13,446 8,894 6,253 4,092
Physical read/write

heads 8 6 4 4 2
Discs 4 3 2 2 1
Recording density

(bits/inch max) 153,870
Track density

(tracks/inch) 9,190
Areal density

(Mbits/inch2 max) 1,581
Spindle speed (RPM) 5,400
Internal data-transfer

rate (Mbits/sec max) 140
I/O data-transfer rate

(Mbytes/sec max) 33.3
ATA da ta -tra ns fe r

modes supported

Cache buf fe r
(Kbytes) 128

Height (mm ma x) 2 6.10
Width (mm max) 101.85
Length (mm max) 147.0

ST38641A ST36531A ST34321A ST33221A ST32110A

8,606 6,505 4,303 3,227 2,111

16,809,660 12,706,470 8,404,830 6,303,024 4,124,736

PIO modes 0, 1, 2, 3, 4;

Multiword DMA modes 0, 1, 2;

Ultra DMA modes 0, 1, 2

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 3

Drive
Specification

ST38641A ST36531A ST34321A ST33221A ST32110A

Weight
(grams typical) 544

Track-t o-t rac k seek
time (msec typical) 1.3 (read), 1.7 (write)

Average seek tim e
(msec typical) 11.0 (read), 11.5 (write)

Full-stroke seek time
(msec typical) 19.8 (read), 20.2 (write)

Average late nc y
(msec) 5.6

Power-on to ready
(sec typical) 10

Standby to ready
(sec typical) 10

Startup current:
12V (peak)
5V (RMS)

1.8 amps

0.6 amps

Seek power
and current (mean) 9.1 watts

Read/Write power
and current (typical) 5.5 watts

Idle mode power
and current (typical) 4.9 watts

Standby mode
power and current

0.9 watts

(typical)
Sleep mode power

and current (typical) 0.9 watts
Voltage tolerance

(including noise)

5V

5%

±

12V ± 8%

Ambient
temperature 5° to 55°C (op.), –40° to 70°C (nonop.)

Temperature
gradient (per hour

20°C

max)
Relative humi dity

(op. and nonop.)

8% to 90% (op.)

5% to 95% (nonop.)

continued

4 Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

continued from pre vi ou s pa ge

Drive
Specification

ST38641A ST36531A ST34321A ST33221A ST32110A

Relative humi dity
gradient 10% per hour max

Wet bulb tempera­ture (max) 29.4°C (op.), 29.4 °C (nonop. )

Altitude (meters
below mean sea
level, max)

–122 to 3,048 (op.)

–122 to 12,192 (nonop.)

Shock, operating
(Gs max at 11 msec) 15

Shock, nonoperating
(Gs max at 11 msec)
(Gs max at 2 msec)

75

200
Vibration, operating 0.50 G (0 to peak, 22–350 Hz)
Vibration,

nonoperating 5.0 Gs (0 to peak, 22–350 Hz)
Drive acoustics

(bels—sound power)

3.5 (typical), 3.9 (ma x)
Idle mode
(dBA—sound pres-

30 (typical)

sure)
Drive acoustics

(bels—sound power)

4.0 (typical), 4.3 (ma x)
Read/Write mode
(dBA—sound pres-

32 (typical)

sure)
Nonrecoverable

read errors 1 per 10

14

bits read

Mean time between
failures

400,000

(power-on hours)
Contact start -st op

cycles

40,000
(25°C, 40% relative
humidity)

Service life (years) 5

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 5

1.0 Drive specifications

Unless otherwise noted, all specifications are measured under ambient
conditions, at 25°C, and nominal power. For convenience, the phrases

the drive

ST38641A, ST36531A, ST34321A, ST33221A and the ST32110A.

and

this drive

1.1 Formatted capacity

are used throughout this manual to indicate the

Drive

Model

ST38641A 8,606 16,809,660 512
ST36531A 6,505 12,706,470 512
ST34321A 4,303 8,404,830 512
ST33221A 3,227 6,303,024 512
ST32110A 2,111 4,124,736 512

Note.

DOS systems cannot access more than 528 Mbytes on a drive
unless 1) the host system supports and is configured for LBA ad­dressing or for extended CHS addressing, 2) the host system
contains a specialized drive controller, or 3) the host system runs
BIOS translation software. Contact your Seagate
sentative for details.

Guaranteed Mbytes

(1 Mbyte = 10

6

bytes)

Guaranteed

sectors

Bytes per

sector

®

repre-

1.1.1 Default logical geomet ry

CHS Mode Cylinders Read/Write heads Sectors per track

ST38641A 16,383 16 63
ST36531A 13,446 15 63
ST34321A 8,894 15 63
ST33221A 6,253 16 63
ST32110A 4,092 16 63

LBA Mode

When addressing either drive in LBA mode, all blocks (sectors) are
consecutively numbered from 0 to
guaranteed sectors as defined above.

n – 1,

where n is the number of

6 Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

1.1.2 Supported CHS translation geometries

These drives support any translation geometry that sati sfies
following conditions:

• Sectors per track ≤ 63

• Cylinders ≤ 16,383 (for drives over 8.4 Gbytes)

• Heads ≤ 16

The ST38641A logical cylinders are:
Logical cylinders=16,809,660 / ( logical sectors per tr ack × logical heads)

The ST36531A logical cylinders are:
Logical cylinders=12,706,470 / ( logical sectors per tr ack × logical heads)

The ST34321A logical cylinders are:
Logical cylinders=8 ,4 0 4, 8 3 0 / (l og i ca l se ct o rs pe r tr a ck × logical heads)

The ST33221A logical cylinders are:
Logical cylinders=6,303,024 / (logical sectors per track × logical heads)

The ST32110A logical cylinders are:
Logical cylinders=4 ,1 2 4, 7 3 6 / (l og i ca l se ct o rs pe r tr a ck × logical heads)

of the

all

1.2 Physical organization

Drive Model Read/Write heads (MR) Number of discs

ST38641A 8 4
ST36531A 6 3
ST34321A 4 2
ST33221A 4 2
ST32110A 2 1

1.3 Recording and interface technology

Interface ATA
Recording method 16/17 (0,14) ZBR
Recording density (bits/inch) 153,870
Track density (tracks/inch) 9,190
Areal density (Mbits/inch

2

) 1,581

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 7

Spindle speed RPM ( ± 0.2%) 5,400
Internal data-transfer rate

(Mbits per second max)
I/O data-transfer rate

(Mbytes per second max)

Interleave 1:1
Cache buffer (Kbytes) 128

140

16.6 (PIO mode 4 with IORDY)

16.6 (multiword DMA mode 2)

33.3 (Ultra DMA mode 2)

1.4 Physical characteristics

Drive Specification

Maximum height (mm)

(inches)

Maximum width (mm)

(inches)

Maximum length (mm)

(inches)

Typical weight (grams)

(pounds)

ST38641A
ST36531A

ST34321A
ST33221A

26.10

1.028

101.85

4.010

147.00

5.787
544

1.2

ST32110A

1.5 Seek time

All seek times are measured using a 486 AT computer (or faster) with an

8.3 MHz I/O bus. The measurements are taken with nominal power at
25°C ambient temperature. All times are measured using drive diagnos­tics. The specifications in the table on page 8 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 full-stroke typical value is determined by averaging 100
full-stroke seeks in both directions.

8 Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

Read

Seek type

Track-to-track 1.3 1.7
Average 11.0 11.5
Full-stroke 19.8 20.2
Average latency: 5.6 msec

Note.

These drives are designed to consistently meet the seek times

represented in this manual. Physical seeks, regardless of mode
(such as track-to-track and average) are expected to meet or ex­ceed the noted values. Due to the manner in which these drives
are formatted, however, benchmark tests that include command
overhead or measure logical seeks may produce results that
vary from these specifications.

(msec, typ.)

Write
(msec, typ.)

1.6 Start/stop times

Power-on to Ready (sec) 10 (typical)
Standby to Ready (sec) 10 (typical)
Ready to spindle stop (sec) 12 (typical)

1.7 Power Specifications

The drive receives DC power (+5V or +12V) through a four-pin standard
drive power connector.

1.7.1 Power consumption

Power requirements for the drives are listed in the table on page 9.
Typical power measurements are based on an average of drives tested
under nominal conditions, using 5.0V input voltage at 25°C ambient
temperature.

Spinup power is measured from the time of power-on to the time that the
drive spindle reaches operating speed.

During seek mode, the read/write actuator arm moves toward a specific
position on the disc surface and does not execute a read or write
operation. Servo electronics are ac tive. Seek mode power represents
the worst case power consumption, using only random seeks with read
or write latency time. This mode is not typical and is provided for worst­case information.

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 9

Read/Write power and current are measured with the heads on track,
based on a 16-sector write followed by a 32-msec delay, then a 16-sector
read followed by a 32-msec delay.

Operating power and current are measured using 40 percent random
seeks, 40 percent read/write mode (1 write for each 10 reads), and 20
percent drive inactive.

Idle mode power is measured with the drive up to speed, with servo
electronics active, and with the heads in a random track location.

During Standby mode, the drive accepts commands, but the drive is not
spinning, and the servo and read/write electronics are in power-down
mode.

Mode Typical Watts RMS Typical Amps RMS

5V 12V

Spinup 0.6 1.8 (Peak)
Seeking 9.1

0.5 0.55
(Random,
no read/write)

Read/Write 5.5 0.5 0.25
Operating 5.5 0.5 0.25
Idle 4.9 0.38 0.25
Standby 0.9 0.18 —
Sleep 0.9 0.18 —

10 Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

1.7.1.1 Typical current profile

Figure 1 shows a typical current profile

Current (Amps)

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.0
0123456789

Time (seconds)

Figure 1. Typical startup and operation current profile

1.7.2 Conducted noise

Input noise ripple is measured at the host system power supply acros s
an equivalent 80-ohm resistive load on the +12 volt line or an equivalent
15-ohm resistive load on the +5 volt line.

• Using 12-volt power, the drive is expected to operate with a maximum
of 120 mV peak-to-peak square-wave injected noise at up to 10 MHz.

• Using 5-volt power, the drive is expected to operate with a maximum
of 100 mV peak-to-peak square-wave injected noise at up to 10 MHz.

Note.

Equivalent resistance i s calculated by dividing the nominal volt-

age by the typical RMS read/write current.

1.7.3 Voltage tolerance

Voltage tolerance (including noise): 5V ± 5% and 12V ± 8%

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 11

1.7.4 Power-management modes

These drives provide programmable power management to provide
greater energy efficiency. In most systems, you can control power
management through the system setup program. These Seagate drives
feature several power-management modes, which are summarized in
the following table and described in more detail below:

Mode Heads Spindle Buffer

Active Tracking Rotating Enabled
Idle Tracking Rotating Enabled
Standby Parked Stopped Enabled
Sleep Parked Stopped Disabled

Active mode.

operations.

Idle mode.

commands and returns t o Active mode an y time d isc access is necessary.

Standby mode.

Standby Immediate command. If the host has set the standby timer, the
drive can also enter Standby mode automatically after the drive has been
inactive for a sp eci fi able len gth of ti me. The st an dby t ime r d ela y is est ab­lished using a Standby or Idle command. In Standby mode, 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.

command from the host. The heads are parked and the spindle is at rest.
The drive leaves Sleep mode after it receives a Hard Reset or Soft Reset
from the host. After receiving a reset, the dr ive exits Sleep mode and
enters Active mode with all current translation parameters intact.

Standby timers.

write or seek), the standby timer is reinitialized and begins counting down
from its specified delay times to ze ro. If the standby timer reach es zero before
any drive activity is required, the drive makes a transition to Standby mode. In
both Idle and Stan db y m ode, the d rive acce pt s all co mm an ds and r eturn s to
Active mode when disc access is necessary.

The drive is in Active mode during the read/write and seek

The buffer remains enabled, and the drive accepts all

The drive enter s Standb y mode when the host sen ds a

The drive enters Sleep mode after receiving a Sleep

Each time the drive performs an Active function (read,

12 Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

1.8 Environmental tolerances

1.8.1 Ambient temperature

Operating 5° to 55°C (41° to 131°F)
Nonoperating –40° to 70°C (–40° to 158°F)

Note.

Above 1, 000 feet (305 meters), t he maximu m temperat ure is der-

ated linearly to 11 2°F (44°C ) at 10,0 00 feet (3,048 meters). Operat­ing ambient temperature is defined as the temperature of the
environment immed iately surro undin g the drive .

1.8.2 Temperature gradient

Operating 20°C/hr (68°F/hr) max, without condensation
Nonoperating 20°C/hr (68°F/hr) max, without condensation

1.8.3 Humidity

1.8.3.1 Relative Humidity

Operating 8% to 90% noncondensing (10% per hour max)
Nonoperating 5% to 95% noncondensing (10% per hour max)

1.8.3.2 Wet bulb temperature

Operating 29.4°C (84°F) max
Nonoperating 29.4°C (84°F) max

1.8.4 Altitude

Operating –122 m to 3,048 m (–400 ft to +10,000 ft)
Nonoperating –122 m to 12,192 m (–400 ft to +40,000 ft)

1.8.5 Shock

All shock specifications assume that the drive is mounted securel y with
the input shock applied at the drive mounting screws. Shock may be
applied in the X, Y or Z axis.

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 13

1.8.5.1 Operating shock

These drives comply with the performance levels specified in this docu­ment when subjected to a maximum operating shock of 15.0 Gs (based
on half-sine shock pulses of 11 msec). Shocks are not to be repeated
more than two times per second.

1.8.5.2 Nonoperating shock

The nonoperating shock level that the drive can experience without
incurring physical damage or degradation in performance when sub­sequently put into operation is 75 Gs (based on nonrepetitive half-sine
shock pulses of 11 msec duration) or 200 Gs (based on nonrepetitive
half-sine shock pulses of 2 msec duration). Shock pulses are defined by
MIL-STD-202F.

1.8.6 Vibration

All vibration specifications as sume that the drive is mounted securely
with the input vibration applied at the drive mounting screws. Vibration
may be applied in the X, Y or Z axis.

1.8.6.1 Operating vibration

The following table lists the maximum vibration levels that the drive may
experience while meeting the performance standards specified in this
document.

5–22 Hz 0.02-inch displacement (peak to peak)
22–350 Hz 0.50 Gs acceleration (zero to peak)

1.8.6.2 Nonoperating vibration

The following table lists the maximum nonoperating vibration that the
drive may experience without incurring physical damage or degradation
in performance when put into operation.

5–22 Hz 0.08-inch displacement (peak to peak)
22–350 Hz 5.0 Gs acceleration (zero to peak)

14 Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

1.9 Drive acoustics

Drive acoustics are measured as overall A-weighted acoustic sound
power levels (no pure tones). All measurements are generally consistent
with ISO document 7779. Sound power measurements are taken under
essentially free-field conditions over a reflecting plane. For all tests, the
drive is oriented with the cover facing upward.

For the Seek mode, the drive is placed in seek only. The number of seeks
per second is defined by the following equation:

Number of seeks per second=0.4/(average latency+average access time)

Typical sound

Mode

Idle 3.5 3.9
Read/Write 4.0 4.3

power (bels)

Maximum sound
power (bels)

1.10 E le ctroma gnet i c sus ce pt ibi lity

These drives operate without errors when subjected to the following:
Radiated noise

Electrostatic discharge*
Magnetic field strength

* Electrostatic discharge susceptibility is measured with the drive

mounted in a representative computer system (mounted to a ground
plane with earth grounding). Discharges are appl ied to the bezel or
other external surfaces on the ground plane.

≤ 3 volt/meter, 30 Hz to 500 MHz
≤ 10 KVolts
≤ 5 Gauss

1.11 Reliability

Nonrecoverable read errors 1 per 1014 bits read, max
Mean time between failures 400,000 power-on hours

(nominal power, 25°C ambient
temperature)

Contact start-stop cycles 40,000 cycles

(at nominal voltage and temperature,
with 60 cycles per hour and a 50%
duty cycle)

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 15

1.12 Agency certification

1.12.1 Safety certification

The drives are recognized in accordance with UL 1950 and CSA C22.2
(950) and meet all applicable sections of IEC950 and EN 60950 as tested
by TUV North America.

1.12.2 Electromagnetic Compatibility

Hard drives that display the CE marking comply with European Union
requirements specified in Electromagnetic Compatibility Directives. Test­ing is performed to standards EN50082-1 and EN55022-B.

Seagate uses an independent laboratory to confirm compliance with the
EC directives specified i n the previous paragraph. Drives ar e tested in
representative end-user systems. Although CE-marked Seagate dr ives
comply with the directives when used in the test systems, we cannot
guarantee that all systems will comply with the directives. The drive is
designed for operation inside a properly designed enclosure, with prop­erly shielded I/O cable (if necessary) and terminators on all unused I/O
ports. Computer manufacturers and system integrators should confi rm
EMC compliance and provide CE marking for their products.

Australian C-Tick

If this model has the C-Tick marking, it complies with the Australia/New
Zealand Standard AS/NZS3548 1995 and meets the Electromagnetic
Compatibility (EMC) Framework requirements of Australi a’s Spectrum
Management Agency (SMA).

1.12.3 FCC verification

These drives are intended to be contained solely within a personal
computer or similar enclosure (not attached as an external device). As
such, each drive is consi dered to be a subassembly even when it i s
individually marketed to the c ustomer. As a subassembly, no Federal
Communications Commission 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, Part 15 of the FCC rules.
Operation with noncertified assemblies is li kely to result in interfer ence
to radio and television reception.

16 Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

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-Televi sion Interference Problems

This booklet is available from the Superintendent of Documents,
U.S. Government Printing Office, Washington, DC 20402. Refer to pub­lication number 004-000-00345-4.

.

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 17

2.0 Drive mounting and configuration

2.1 Handling and static-discharge precautions

After unpacking, and before installation, the drive may be exposed to
potential handling and electrostatic discharge (ESD) hazards. Observe
standard static-discharg e preca ution s. A grou nded wrist- strap is p referr ed.

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 of the drive.
Always rest the drive on a padded antistatic surface until you mount it in
the host system.

2.2 Jumper settings

2.2.1 Master/slave conf i gurat ion

You must establish a master/slave relationship between two drives that
are attached to a single AT bus. You can configure a drive to be a master
or slave by setting the master/slave j umpers, sho wn i n F igu re 2 on
page 18.

These drives support master/slave configuration using the cable select
option. This requires a special daisy-c hain 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 sl ave. 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 this drive
for cable select, install a jumper as shown in Figure 2.

For the master drive 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.

2.2.2 Alternate capacity jumper

Some older computers may “hang” if their BIOS detects a hard drive that
has more than 4,092 cylinders at startup. To allow these computer s to
recognize the ST38641A, the ST36531A, the ST34321 or the ST33221A,
these drives include a capacity-limiting jumper , which sets the drive’s
default translation geometry to 4,092 cylinders. This limits the drive’s
capacity to 2.1 Gbytes, unless third-party software is used.

18 Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

ATA interface

connector

pin 1

24

8

Alternate capacity and master/slave
jumper settings

1.

The drive is shipped with a jumper on pins 7
and 8. This configures the drive for master or
single drive operation.

2. Consult your computer manual to determine
whether your computer supports cable select.

3. Use this jumper setting
not work with a jumper on pins 7 and 8.

4. Use this jumper setting if your computer fails
to boot because it cannot address drives with
more than 4,092 cylinders.

only

if the drive does

4-pin power

connector

Slave

Master or single drive

Enable cable select

Master with non-ATA
compatible slave

Limit capacity to 2.1 Gbytes
(4,092 cylinders)

1

2

3

4

135

6

7

Figure 2. Alternate capacity jumper and master/slave jumpers

2.3 Drive mounting

You can mount the drive in any orientation using four screws in the
side-mounting holes or four screws in the bottom-mounting holes. See
Figure 3 for drive mounting dimensions.

Important mounting precautions:

• Allow a minimum clearance of 0.030 inches (0.76 mm) around the
entire perimeter of the drive for cooling.

• Use only 6

• The screws sh ould be inser ted no mor e than 0. 22 inc h (5.58 mm) int o

the bottom moun ting holes and no m ore than 0.20 inch (5.0 mm) into the
side mounting holes.

• Do not overtighten the mounting screws (maximum torque: 3 inch-lb,

0.34 N.m, 3.45 kgf.cm).

• Do not use a drive interfa ce cable that is more than 18 inches (4 57 mm)
long.

32 UNC mounting screws.

-

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 19

Note. Dimensions are shown in mm (inches)

94.3 ± 0.8

[3.71 ± 0.03]

71.8 ± 0.8

[2.83 ± 0.03]

56.5 ± 0.8

[2.23 ± 0.03]

26.10 MAX
[1.028]

147.00 MAX
[5.787]

3X 6.35 ± 0.31

[0.250 ± 0.012]

BOTH SIDES

5.83 ± 0.38

[0.230 ± 0.015]

27.90 ± 0.27

[1.098 ± 0.011]

41.60 ± 0.33

[1.638 ± 0.013]

101.60 ± 0.33

[4.000 ± 0.013]

3X 6-32 UNC 2B
MAX INSERTION DEPTH

0.20 (5.0 mm) BOTH SIDES

PIN ONE J2

0.27

±

40.77

0.011]

[1.605 ±

44.45 ± 0.33

[1.750 ± 0.013]

4X 6-32 UNC 2B
MAX INSERTION
DEPTH 0.22 (5.6 mm)

PIN ONE J3

[0.125 ± 0.011]

PIN ONE J4

[3.750 ± 0.014]

3.18 ± 0.27

±

95.24

0.35

101.85 MAX

[4.010 MAX]

4.66 ± 0.38

[0.183 ± 0.015]

Figure 3. Mounting dimensions—top, side and end view

20 Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 21

3.0 ATA interface

These drives use the industry-standard ATA task file interface that
supports 16-bit data transfers. It supports ATA programmed input/output
(PIO) modes 0, 1, 2, 3 and 4; multiword DMA modes 0, 1 and 2; and Ultra
DMA modes 0, 1 and 2. The drive also supports the use of the IORDY
signal to provide reliable high-speed data transfers.

You can use a daisy-chain cable to connect two drives to a single AT
host bus. For detailed information regarding the ATA interface, r efer to
the draft of

4), NCITS T13 1153D,
Standard

3.1 ATA interface signals and connector pins

Figure 4 on page 22 summarizes the signals on the ATA interface
connector that the drive supports. For a detailed description of these
signals, refer to the

AT Attachment with Packet Interface Extension (ATA/ATAPI-

subsequently referred to as the

.

Draft ATA-4 Standard.

Draft ATA-4

22 Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

Drive pin #

10
11
12
13
14
15
16
17
18
19
20
21
22
23

24
25

26
27

28
29
30
31
32
33
34
35
36
37
38
39
40

Signal name

–

1
2
3
4
5
6
7
8
9

Reset
Ground

DD7
DD8
DD6
DD9
DD5

DD10

DD4

DD11

DD3

DD12

DD2

DD13

DD1

DD14

DD0

DD15

Ground

(removed)

DMARQ

Ground

DIOW–:

STOP
Ground
DIOR–:

HDMARDY–:

HSTROBE

Ground

IORDY:

DDMARDY–:

DSTROBE

CSEL

–

DMACK

Ground
INTRQ

–

IOCS16

DA1

–

PDIAG

DA0
DA2

–

CS0

–

CS1

–

DASP
Ground

Host pin # and signal description

1

Hardware Reset

2

Ground

3

Host Data Bus Bit 7

4

Host Data Bus Bit 8

5

Host Data Bus Bit 6

6

Host Data Bus Bit 9

7

Host Data Bus Bit 5

8

Host Data Bus Bit 10

9

Host Data Bus Bit 4

10

Host Data Bus Bit 11

11

Host Data Bus Bit 3

12

Host Data Bus Bit 12

13

Host Data Bus Bit 2

14

Host Data Bus Bit 13

15

Host Data Bus Bit 1

16

Host Data Bus Bit 14

17

Host Data Bus Bit 0

18

Device Data (15:0)

19

Ground
(No Pin)

20
21

DMA Request

22

Ground

23

Device I/O Write:
Stop Ultra DMA Burst

24

Ground

25

Device I/O Read:
Host Ultra DMA Ready:
Host Ultra DMA Data Strobe

26

Ground

27

I/O Channel Ready
Device Ultra DMA Ready
Device Ulta DMA Data Strobe

28

Cable Select

29

DMA Acknowledge

30

Ground

31

Device Interrupt

32

Reserved

33

Host Address Bus Bit 1

34

Passed Diagnostics

35

Device Address (2:0)

36

Device Address (2:0)

37

Chip Select (1:0)

38

Chip Select (1:0)

39

Drive Active / Slave Present

40

Ground

Pins 28, 34 and 39 are used for master-slave communication (details shown below).

28
34
39

Figure 4. I/O pins and supported ATA signals

Drive 0 (master)Drive 1 (slave)

28
34
39

CSEL

PDIAG

DASP–

–

Host

28
34
39

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 23

3.2 ATA Interface commands

3.2.1 Supported ATA commands

The following table lists ATA-standard commands that the drive supports.
For a detailed description of the ATA commands, refer to the

Standard.

See Section 3.2.4 on page 30 for details and subcommands

used in the S.M.A.R.T. implementation.

Supported by

Command name

Command

code

ST38641A, ST36531A,

ST34321A, ST33221A,

ATA-standard commands

Draft AT A-4

ST32110A

Download Microcode 92
Execute Device Diagnostic 90
Flush Cache E7
Format Track 50
Identify Device EC
Initialize Device Parameters 91
Read Buffer E4
Read DMA C8

H, C9H

Read Multiple C4
Read Sectors 20
Read Verify Sectors 40

H, 21H
H, 41H

Recalibrate 10
Seek 70
Set Features EF
Set Multiple Mode C6
S.M.A.R.T. B0

H
H
H
H

H
H
H

Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes

H

Yes
Yes
Yes

H
H

H

H
H

Yes
Yes
Yes
Yes
Yes

continued

24 Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

continued from pre vi ou s pa ge

Supported by

Command name

Command

code

ST38641A, ST36531A,

ST34321A, ST33221A,

ST32110A

Write Buffer E8
Write DMA CA

H, CBH

Write Multiple C5
Write Sectors 30

H, 31H

ATA-standard power-management commands

Check Power Mode 98
Idle 97
Idle Immediate 95
Sleep 99
Standby 96
Standby Immediate 94

or E5

H

or E3

H

or E1

H

or E6

H

or E2

H

or E0

H

H

Yes
Yes

H

Yes
Yes

H
H
H
H
H
H

Yes
Yes
Yes
Yes
Yes
Yes

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 25

The following commands contain drive-specific features that may not be
described in the

Draft ATA-4 Standard

.

3.2.2 Identify Drive command

The Identify Drive command (command code ECH) transfers information
about the drive to the host following power up. The data is organized as
a single 512-byte block of data, whose c ontents are shown in the table
below. All reserved bits or words should be set to zero. Parameters listed
with an “x” are drive-specific or vary with the state of the drive. See
Section 1 of this manual for default parameter settings.

Note.

If the alternate capacity jumper is installed on these drives, the drive

capacity is reduced in word 1 to 4,09 2 cylinder s.

Word Description Contents

Configuration information:

•

Bit 15: 0 = ATA; 1 = ATAPI

•

0

Bit 7: removable media

•

Bit 6: removable controller

•

Bit 0: reserved

Number of logical cylinders:

16,383 (ST38641A)

1

13,446 (ST36531A)
8,894 (ST34321A)
6,253 (ST33221A)
4,092 (ST32110A)

0C5A

H

3FFF

H

(ST38641A)

3486

H

(ST36531A)

22BE

H

(ST34321A)

186D

H

(ST33221A)

0FFC

H

(ST32110A)

2 ATA-reserved 0000

3

4 Retired 0000

continued

Number of logical heads:

15 (ST36531A, ST34321A)
16 (ST38641A, ST33221A,

ST32110A)

H

000F

H
(ST36531A)
(ST34321A)

0010

H
(ST38641A)
(ST33221A)
(ST32110A)

H

26 Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

Word Description Contents

5 Retired 0000

Number of logical sectors per logical

6

track: 63

003F

7–9 Retired 0000

10–19

Serial number:
(20 ASCII characters, 0000

= none)

H

ASCII

20 Retired 0000
21 Retired 0100
22 Obsolete 0000

Firmware revision (8 ASCII character

23–26

string, padded with blanks to end of
string)

ST38641A

27–46

Drive model number: (40 ASCII
characters, padded with blanks to end
of string)

ST36531A
ST34321A
ST33221A
ST32110A

(Bits 7–0) Maximum sectors per

47

interrupt on Read Multiple and Write

8020

Multiple (64)

H

H

H

H
H
H

x.xx

H

48 Reserved 0000
49

Standard Standby timer, IORDY

supported and may be disabled
50 ATA-reserved 0000
51 PIO data-transfer cycle timing mode 0200
52 Retired 0200
53 Words 54–58, 64–70 and 88 are valid 0007
54 Number of current logical cylinders
55 Number of current logical heads

56

Number of current logical sectors per

logical track

57–58 Current capacity in sectors

2F00

xxxx
xxxx

xxxx
xxxx

H

H

H
H
H

H
H
H

H

H

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 27

Word Description Contents

59

Number of sectors transferred during a
Read Multiple or Write Mu ltip le com mand

7EBC

60–61

Total number of user-addressable
LBA sectors available:

16,809,660 (ST38641A)
12,706,470 (ST36531A)
8,404,830 (ST34321A)
6,303,024 (ST33221A)
4,124,736 (ST32110A)

(ST38641A)

E2A6H 00C1

(ST36531A)

3F5EH 0080

(ST34321A)

2D30H 0060

(ST33221A)

F040H 003E

(ST32110A)

62 Retired 0000
63

64

65

66

67

Multiword DMA active and modes
supported (see note following this table)

Advanced PIO modes supported
(modes 3 and 4 supported)

Minimum multiword DMA transfer cycle
time per word (120 nsec)

Recommended multiword DMA transfer
cycle time per word (120 nsec)

Minimum PIO cycle time without
IORDY flow control (240 nsec)

xxxx

H

07

xx

0003

0078

0078

00F0

H

0100

H

H

H

H

H

H

H

H

H

H

H

68

Minimum PIO cycle time with IORDY
flow control (120 nsec)

69–74 ATA-reserved 0000

75 Queue depth 0000

76–79 ATA-reserved 0000

80 Major version number 001E
81 Minor version number 0000
82 Command sets supported 3069
83 Command sets supported 4001

continued

0078

H

H
H
H
H
H
H
H

28 Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

Word Description Contents

84 Command sets support extension 4000
85 Command sets enabled 30
86 Command sets enabled 0001
87 Command sets enable extension 4000
88 Ultra DMA support and current mode 0x07
89 Security erase time 0000
90 Enhanced security erase time 0000

91–127 ATA-reserved 0000

128 Security status 0000

129–159 Seagate-reserved

xxxx

160–255 ATA-reserved 0000

Note.

The following Multiword DMA and Ultra DMA mode settings are

used in words 63 and 88, respectively, of the Identify Drive data:

Description (if bit is set to 1)
Bit Word 63

0 Multiword DMA mode 0 is supported.
1 Multiword DMA mode 1 is supported.

xx

H

H

H

H

H

H

H

H

H
H

H

2 Multiword DMA mode 2 is supported.
8 Multiword DMA mode 0 is currently active.
9 Multiword DMA mode 1 is currently active.
10 Multiword DMA mode 2 is currently active.

Bit Word 88

0 Ultra DMA mode 0 is supported.
1 Ultra DMA mode 1 is supported.
2 Ultra DMA mode 2 is supported.
8 Ultra DMA mode 0 is currently active.
9 Ultra DMA mode 1 is currently active.
10 Ultra DMA mode 2 is currently active.

Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 29

3.2.3 Set Features command

This command controls the implementation of var ious features that the
drive supports. When the drive receives this command, it sets BSY,
checks the contents of the Features register, clears BSY and generates
an interrupt. If the value in the register does not represent a feature that
the drive supports, the command is aborted. Power-on default has the
read look-ahead and write caching features enabled. The acceptable
values for the Features register are defined as follows:

Enable write cache

02

H

03HSet transfer mode (based on value in Sector Count register)

Sector Count register values:

Set PIO mode to default (PIO mode 2)

00

H

Set PIO mode t o defa ult a nd d isable IORDY (P IO mode 2)

01

H

08

PIO mode 0

H

PIO mode 1

09

H

PIO mode 2

0A

H

0BHPIO mode 3

PIO mode 4

0C

H

Multiword DMA mode 0

20

H

Multiword DMA mode 1

21

H

Multiword DMA mode 2

22

H

Ultra DMA mode 0

40

H

Ultra DMA mode 1

41

H

Ultra DMA mode 2

42

H

Disable read look-ahead (read cache) feature

55

H

Disable write cache

82

H

Enable read look-ahead (read cache) feature

AA

H

F1HReport full capacity available

(default)

(default)

(default)

At power-on, or after a hardware reset, the default values of the features
are as indicated above. A software reset also changes the features to
the default values.

30 Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B

3.2.4 S.M.A.R.T. commands

S.M.A.R.T. provides near-term failure prediction for disc drives. When
S.M.A.R.T. is enabled, the drive monitors predetermined drive attributes
that are susceptible to degradation over time. If self- monitoring deter­mines that a failure is likely, S.M.A.R.T. makes a status report available
to the host. Not all failures are predictable. S.M.A.R.T. predictability is
limited to the attributes the drive can monitor. For more information on
S.M.A.R.T. commands and implementation, see the

These drives are shipped with S.M.A.R.T. features disabled. You must
have a recent BIOS or software package that supports S.M.A.R.T. to
enable the feature. The table below shows the S.M.A.R.T. command
codes that these drives use.

Code in
Features
Register S.M.A.R.T. Command

Draft ATA-4 Standard.

Supported by
ST38641A
ST36531A
ST34321A
ST33221A
ST32110A

D0

H

D1

H

D2

H

D3

H

D4

H

D7

H

D8

H

D9

H

DA

H

Note.

S.M.A.R.T. Read Data Yes
Vendor-specific Yes
S.M.A.R.T. Enable/Disable Attribute

Autosave

Yes

S.M.A.R.T. Save Attribute Values Yes
S.M.A.R.T. Execute Off-line Immediate Yes
Vendor-specific Yes
S.M.A.R.T. Enable Operations Yes
S.M.A.R.T. Disable Operations Yes
S.M.A.R.T. Return Status Yes

If an appropriate code is not written to the Features Register, the

command is aborted and 0

04 (abort) is written to the Error reg-

x

ister.

Seagate Technology, Inc.
920 Disc Drive, Scotts Valley, California 95066, USA

Publication Number: 20400075-001, Rev. B, Printed in USA