Seagate Barracuda ATA Series User manual

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Barracuda ATA Family
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ST328040A, ST327240A, ST320430A
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ST313620A, ST310220A, ST36810A
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Ultra ATA Interface Drives
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Product Manual
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Barracuda ATA Family
. . . . . . . . . . . .. . . . . . . . . . . . . .. . . . . . . . . . . . . . .. . .
ST328040A, ST327240A, ST320430A
...... ........ ........ ........ ........ .......
ST313620A, ST310220A, ST36810A
...... ........ ........ ........ ........ .......
Ultra ATA Interface Drives
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Product Manual
...... ........ ........ ........ ........ .......

 1999 Seagate Technology, Inc. All rights reserved
Publication Number: 20400144-001, Rev. B, December 1999
Seagate, Seagate Technology, the Seagate logo and Barracuda 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.

Barracuda ATA Family Product Manual, 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
1.2 Physical organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Recording and interface technology . . . . . . . . . . . . . . . . . . . . 6
1.4 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5 Seek time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.6 Start/stop times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
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 . . . . . . . . . . . . . . . . . . . . . 10
1.8 Environmental tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.8.1 Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 11
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.10 Electromagnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . 14
1.11 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.12 Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.12.1 Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.12.2 Electromagnetic compatibility . . . . . . . . . . . . . . . . . . . 14

iv Barracuda ATA Family Product Manual, Rev. B
1.12.3 FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.0 Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . 17
2.1 Handling and static-discharge precautions . . . . . . . . . . . . . . 17
2.2 Jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.2.1 Master/slave configuration . . . . . . . . . . . . . . . . . . . . . . 18
2.2.2 Cable-select option . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.2.3 Alternate capacity jumper . . . . . . . . . . . . . . . . . . . . . . . 19
2.2.4 Ultra ATA/66 cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.0 ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.1 ATA interface signals and connector pins . . . . . . . . . . . . . . 21
3.1.1 Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . 23
3.1.2 Identify Drive command . . . . . . . . . . . . . . . . . . . . . . . . 24
3.1.3 Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.1.4 S.M.A.R.T. commands . . . . . . . . . . . . . . . . . . . . . . . . . 30

Barracuda ATA Family Product Manual, Rev. B v
Figures
Figure 1. Typical startup and operation current profile . . . . . . . . . . . . 9
Figure 2. Master/slave jumper settings . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 3. Mounting dimensions—top, side and end view . . . . . . . . . 20
Figure 4. I/O pins and supported ATA signals. . . . . . . . . . . . . . . . . . 22

vi Barracuda ATA Family Product Manual, Rev. B

Barracuda ATA Family Product Manual, Rev. B 1
Introduction
This manual describes the functional, mechanical and interface specifi-
cations for the ST328040A, ST327240A, ST320430A, ST313620A,
ST310220A, and the ST36810A. These drives provide the following key
features:
•Low power consumption
•Quiet operation
•High instantaneous (burst) data-transfer rates (up to 66.6 Mbytes per
second) using Ultra DMA mode 4
•7,200-RPM and 512-Kbyte buffer combine for superior desktop per-
formance
•300 Gs nonoperating shock
•GMR recording heads and EPRML technology, which provide the
drives with increased areal density
•State-of-the-art cache and on-the-fly error-correction algorithms
•Full-track multiple-sector transfer capability without local processor
intervention
•Support for S.M.A.R.T. drive monitoring and reporting
•Support for Read Multiple and Write Multiple commands
•Support for autodetection of master/slave drives that use cable select
(CSEL)

2 Barracuda ATA Family Product Manual, 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 section
of this manual.
Drive Specification ST328040A
ST327270A ST320430A ST313620A ST310220A ST36810A
Guaranteed Mbytes
(×106bytes) 28,520
27,333 20,520 13,666 10,242 6,833
Guaranteed sectors 55,704,096
53,385,552 40,079,088 26,692,776 20,005,650 13,346,235
Bytes per sector 512
Default sectors per
track 63
Default read/write
heads 16 16 16 16 15
Default cylinders 16,383 16,383 16,383 16,383 14,123
Physical read/write
heads 86432
Discs 43221
Recording density
KBPI (bits/inch max) 305
Track density
TPI (tracks/inch) 16,420
Areal density
(Mbits/inch2 max) 5,100
Spindle speed
(RPM) 7,200
Internal data-trans-
fer rate (Mbits/sec
max) 323
I/O data-transfer
rate (Mbytes/sec-
max) 66.6
ATA data-transfer-
modes supported PIO modes 0–4 Multiword DMA modes 0–2
Ultra DMA modes 0–4
Cache buffer
(Kbytes) 512
Height (mm max) 26.1

Barracuda ATA Family Product Manual, Rev. B 3
Width (mm max) 102
Length (mm max) 147.0
Weight (typical) 550 grams (1.2 lb)
Average latency
(msec) 4.16 msec
Power-on to ready
(sec typical) 12 sec
Standby to ready
(sec typical) 12 sec
Startup current
(typical) 12V (peak) 2.2 amps
Track-to-track seek
time (msec typical) 0.9
Average seek time
(read, msec typical) 8.0 7.6
Full-stroke seek
time (msec typical) 14.5 14.2
Seek power
(typical) 11.9 watts
Read/Write power
(typical) 8.5 watts 7.5 watts
Idle mode
(typical) 7.5 watts 6.8 watts
Standby mode
(typical) 1.2 watts
Sleepmode(typical) 1.0 watts
Voltage tolerance
(including noise) 5V ±5% – 0.7 amps max 12V ±10% – 2.4 amps max
Ambient tempera-
ture 0° to 55°C (op.), –40° to 70°C (nonop.)
Temperature gradi-
ent (°C per hour-
max) 20°C
Relative humidity
(op. and nonop.) 8% to 80% (op.) 5% to 90% (nonop.)
Relative humidity
gradient 30% per hour max
Drive Specification ST328040A
ST327270A ST320430A ST313620A ST310220A ST36810A

4 Barracuda ATA Family Product Manual, Rev. B
Wet bulb tempera-
ture (°C max) 29.4 (op.), 40.0 (nonop.)
Altitude, operating –122 m to 3,048 m (–400 ft to 10,000+ ft)
Altitude (meters be-
low mean sea level,
max) –122 m to 12,192 m (–400 ft to 40,000+ ft)
Shock, operating
(Gs max at 2 msec) 63
Shock, nonoperat-
ing (Gs max at 2
msec) 300 Gs
Vibration, operating 0.5 Gs (0 to peak, 5–300 Hz)
Vibration,
nonoperating 5 Gs (0 to peak, 5–300 Hz)
Drive acoustics
Sound power (Bels)
Idle mode
Seek mode 3.5 (typical), 3.9 (max)
4.0 (typical), 4.3 (max)
Nonrecoverable
read errors 1 per 1014 bits read
Mean time between
failures (power-on
hours) 500,000
Contact start-stop
cycles (25°C, 40%
relative humidity) 50,000
Service life (years) 5
Drive Specification ST328040A
ST327270A ST320430A ST313620A ST310220A ST36810A

Barracuda ATA Family Product Manual, 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 and this drive are used throughout this manual to indicate the
ST328040A, ST327240A, ST320430A, ST313620A, ST310220A and
the ST36810A.
1.1 Formatted capacity
1.1.1 Default logical geometry
LBA Mode
When addressing either drive in LBA mode, all blocks (sectors) are
consecutively numbered from 0 to
n–1, where n is the number of
guaranteed sectors as defined above
.
Drive Model Guaranteed Mbytes
(1 Mbyte = 106bytes) Guaranteed
sectors Bytes per sector
ST328040A 28,520 55,385,552 512
ST327240A 27,333 53,704,096 512
ST320430A 20,520 40,079,088 512
ST313620A 13,666 26,692,776 512
ST310220A 10,242 20,005,650 512
ST36810A 6,833 13,346,235 512
CHS Mode Cylinders Read/Write heads Sectors per track
ST328040A 16,383 16 63
ST327240A 16,383 16 63
ST320430A 16,383 16 63
ST313620A 16,383 16 63
ST310220A 16,383 16 63
ST36810A 14,123 15 63

6 Barracuda ATA Family Product Manual, Rev. B
1.2 Physical organization
1.3 Recording and interface technology
1.4 Physical characteristics
Drive Model Read/Write heads (GMR) Number of discs
ST328040A/ST327240A 8 4
ST320430A 6 3
ST313620A 4 2
ST310220A 3 2
ST36810A 2 1
Interface ATA
Recording method 16/17 EPRML
Recording density KBPI (bits/inch) 305
Track density TPI (tracks/inch) 16,420
Areal density (Mbits/inch2max) 5,100
Spindle speed (RPM) (±0.2%) 7,200
Internal data-transfer rate
(Mbits/sec max) 323
I/O data-transfer rate
(Mbytes/sec max) 16.6 (PIO mode 4) 66.6 (Ultra DMA mode 4)
Interleave 1:1
Cache buffer (Kbytes) 512
Drive Specification ST328040A, ST327240A, ST320430A,
ST313620A, ST310220A, ST36810A
Maximum height (mm)
(inches) 26.1 1.028
Maximum width (mm)
(inches) 101.8 4.020

Barracuda ATA Family Product Manual, Rev. B 7
1.5 Seek time
Seek measurements are taken with nominal power at 25°C ambient
temperature. All times are measured using drive diagnostics. The spec-
ifications 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.
•Averageseektimeisatruestatisticalrandomaverageofatleast5,000
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.
Note. These drives are designed to consistently meet the seek times rep-
resentedin this manual.Physical seeks,regardlessofmode(suchas
track-to-trackandaverage)areexpectedtomeetorexceedthenoted
values.However,duetothemannerinwhichthesedrivesareformat-
ted, benchmark tests that include command overhead or measure
logicalseeksmay produce resultsthatvaryfrom thesespecifications.
1.6 Start/stop times
Maximum length (mm)
(inches) 147.0 5.78
Typical weight (grams)
(pounds) 550 1.2
Typicalseek times (msec) Read Write
Track-to-track 0.9 1.6
Average *8.0/7.6 9.1
Full-stroke *14.5/14.2 *17.5/16.9
Average latency: 4.16 msec — —
*8.0averageread,14.5full-strokereadand17.5full-strokewriteapplies
to the ST328040A and ST327240A only.
Power-on to Ready (sec) 12 (typical)
Standby to Ready (sec) 12 (typical)
Ready to spindle stop (sec) 11 (typical)

8 Barracuda ATA Family Product Manual, Rev. B
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
Spinup power is measured from the time of power-on to the time that
the drive spindle reaches operating speed.
•Seek Mode
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 active. Seek mode power rep-
resents the worst-case power consumption, using only random seeks
with read or write latency time. This mode is not typical and is provided
for worst-case information.
•Read/Write power and current
Read/write power is 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
Operating power is 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
Idle mode power is measured with the drive up to speed, with servo
electronics active and with the heads in a random track location.
•Standby mode
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.

Barracuda ATA Family Product Manual, Rev. B 9
1.7.1.1 Typical current profile
Figure 1. Typical startup and operation current profile
Models ST328040A and ST327270A Typical Amps RMS
Power Mode Typical Watts RMS 5V 12V
Spinup — — 2.2 (peak)
Seeking (Random,
no read/write) 11.9 0.340 0.850
Operating (read/write) 8.5 0.485 0.505
Idle 7.5 0.310 0.496
Standby 1.2 0.194 0.019
Sleep 1.0 0.128 0.030
Models ST320430A, ST313620A,
ST310220A and ST36810A Typical Amps RMS
Power Mode Typical Watts RMS 5V 12V
Spinup — — 2.2 (peak)
Seeking (Random,
no read/write) 11.9 0.340 0.850
Operating (read/write) 7.5 0.485 0.422
Idle 6.8 0.310 0.440
Standby 1.2 0.194 0.019
Sleep 1.0 0.128 0.030
Time (seconds)
Current (mA)
012345678910
2.5
2.0
1.5
1.0
0.5
0

10 Barracuda ATA Family Product Manual, Rev. B
1.7.2 Conducted noise
Input noise ripple is measured at the host system power supply across
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 is calculated by dividing the nominal volt-
age by the typical RMS read/write current.
1.7.3 Voltage tolerance
Voltage tolerance (including noise):
1.7.4 Power-management modes
The drive provides programmable power management to provide great-
er energy efficiency. In most systems, you can control power manage-
mentthroughthesystemsetupprogram.Thedrivefeaturesthefollowing
power-management modes:
•Active mode
The drive is in Active mode during the read/write and seek operations.
•Idle mode
The buffer remains enabled, and the drive accepts all commands and
returns to Active mode any time disc access is necessary.
5V ± 5% 0.7 amps max
12V ± 10% 2.4 amps max
Power Modes Heads Spindle Buffer
Active Tracking Rotating Enabled
Idle Tracking Rotating Enabled
Standby Parked Stopped Enabled
Sleep Parked Stopped Disabled

Barracuda ATA Family Product Manual, Rev. B 11
•Standby mode
The drive enters Standby mode when the host sends a 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 specifiable length of time. The standby timer delay is
established using a Standby or Idle command. In Standby mode, the
drive buffer is 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 command from
the host. In Sleep mode, the drive buffer is disabled, 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 drive exits Sleep mode and enters Active mode with all
current translation parameters intact.
•Idle and Standby timers
Each time the drive performs an Active function (read, write or seek), the
standby timer is reinitialized and begins counting down from its specified
delay times to zero. If the standby timer reaches zero before any drive
activity isrequired,the drivemakes a transition to Standbymode.Inboth
Idle and Standby mode, the drive accepts all commands and returns to
Active mode when disc access is necessary.
1.8 Environmental tolerances
1.8.1 Ambient temperature
Ambient temperature is defined as the temperature of the environment
immediatelysurroundingthedrive.Actual drivecasetemperatureshould
not exceed 69°C (156°F) within the operating ambient conditions. Rec-
ommended measurement locations are shown in Figure 3 on page 20.
Above 1,000 feet (305 meters), the maximum temperature is derated
linearly to 112°F (44°C) at 10,000 feet (3,048 meters).
Operating 0° to 55°C (32° to 131°F)
Nonoperating –40° to 70°C (–40° to 158°F)

12 Barracuda ATA Family Product Manual, Rev. B
1.8.2 Temperature gradient
1.8.3 Humidity
1.8.3.1 Relative Humidity
1.8.3.2 Wet bulb temperature
1.8.4 Altitude
1.8.5 Shock
All shock specifications assume that the drive is mounted securely with
the input shock applied at the drive mounting screws. Shock may be
applied in the X, Y or Z axis.
1.8.5.1 Operating shock
These drives comply with the performance levels specified in this docu-
ment when subjected to a maximum operating shock of 63 Gs (based
on half-sine shock pulses of 2 msec). Shocks should not 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 subse-
quently put into operation is 300 Gs (based on a nonrepetitive half-sine
shock pulse of 2 msec duration).
Operating/Nonoperating 20°C/hr (36°F/hour) max,
without condensation
Operating 8% to 80% noncondensing (30% per hour max)
Nonoperating 5% to 90% noncondensing (30% per hour max)
Operating 29.4°C (84°F) max
Nonoperating 40.0°C (104°F) max
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)