Seagate ST317221A User manual

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U8 Family
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ST317221A, ST313021A
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ST38410A, ST34313A
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Ultra ATA Interface Drives
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Product Manual
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U8 Family
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ST317221A, ST313021A
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ST38410A, ST34313A
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Ultra ATA Interface Drives
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Product Manual
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 1999 Seagate Technology, Inc. All rights reserved
Publication Number: SG35226-001, Rev. A, October 1999
Seagate, Seagate Technology, the Seagate logo and U8 are either
registered trademarks or 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.

U8 Family Product Manual, Rev. A iii
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Specification summary table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Physical organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Recording and interface technology. . . . . . . . . . . . . . . . . . . . . . . . 6
Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Seek time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Start/stop times. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Voltage tolerance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power-management modes . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Environmental tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Temperature gradient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Humidity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Altitude. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Shock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Drive acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electromagnetic susceptibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Electromagnetic compatibility . . . . . . . . . . . . . . . . . . . . . . . . . 14

iv U8 Family Product Manual, Rev. A
FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . . . . . 17
Handling and static-discharge precautions . . . . . . . . . . . . . . . . . 17
Jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Master/slave configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Cable-select option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Ultra ATA/66 cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
ATA interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
ATA interface signals and connector pins . . . . . . . . . . . . . . . . . . 21
Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Identify Drive command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
S.M.A.R.T. commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

U8 Family Product Manual, Rev. A v
Figures
Typical startup and operation current profile. . . . . . . . . . . . . . . . . . . . 9
Master/slave jumper settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Mounting dimensions—top, side and end view. . . . . . . . . . . . . . . . . 20
I/O pins and supported ATA signals . . . . . . . . . . . . . . . . . . . . . . . . . 22

vi U8 Family Product Manual, Rev. A

U8 Family Product Manual, Rev. A 1
Introduction
This manual describes the functional, mechanical and interface specifi-
cations for the ST317221A, ST313021A, ST38410A and the ST34313A.
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
•8.9 msec seek time, 5,400-RPM and 512-Kbyte buffer combine for
excellent desktop performance
•350 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 U8 Family Product Manual, Rev. A
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 ST317221A ST313021A ST38410A ST34313A
Guaranteed Mbytes (×106bytes) 17,245 13,022 8,622 4,327
Guaranteed sectors 33,683,328 25,434,228 16,841,664 8,452,080
Bytes per sector 512
Default sectors per track 63
Default read/write heads 16 16 16 15
Default cylinders 16,383 16,383 16,383 8,944
Physical read/write heads 4321
Discs 2211
Recording density
BPI (bits/inch max) 349,374
Track density
TPI (tracks/inch) 18,700
Areal density
(Mbits/inch2 max) 6,536
Spindle speed (RPM) 5,400
Internal data-transfer rate (Mbits/
sec max) 285.5
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
Width (mm max) 102
Length (mm max) 147.0
Weight (typical) 590 grams (1.3 lb)
Track-to-track seek time
(msec typical) 1.5 (read) 2.1 (write)
Average seek time (msec typical) 8.9

U8 Family Product Manual, Rev. A 3
Full-stroke seek time
(msec typical) 23.0 (read) 25.0 (write)
Average latency (msec) 5.56 msec
Power-on to ready
(sec typical) 10 sec
Standby to ready
(sec typical) 10 sec
Spin down (sec typical) 10 sec
Startup current
(typical) 12V (peak) 1.5 amps
Seek power (typical) 7.0 watts
Read/Write power 6.5 watts
Idle mode (typical) 3.5 watts
Standby/Sleep mode (typical) 0.8 watts
Voltage tolerance
(including noise) 5V ±5%, 12V ±10%
Ambient temperature 0° to 60°C (op.), –40° to 70°C (nonop.)
Temperature gradient
(°C per hour max) 20°C
Relative humidity
(op. and nonop.) 5% to 90% (op.) 5% to 95% (nonop.)
Relative humidity, gradient 30% per hour max
Wet bulb temperature (°C max) 29.4 (op.), 40.0 (nonop.)
Altitude, operating –61 m to 3,048 m (–200 ft to 10,000+ ft)
Altitude(meters belowmeansea
level, max) –122 m to 12,192 m (–400 ft to 40,000+ ft)
Shock, operating
(Gs max at 2 msec) 63
Shock, nonoperating
(Gs max at 2 msec) 350 Gs
Vibration, operating 0.5 Gs (0 to peak, 5–350 Hz)
Vibration, nonoperating 5 Gs (0 to peak, 5–350 Hz)
Drive acoustics
Sound power in bels (10.5 msec)
Idle mode
Seek mode 3.2 (typical), 3.6 (max)
3.5 (typical), 3.9 (max)
Drive Specification ST317221A ST313021A ST38410A ST34313A

4 U8 Family Product Manual, Rev. A
Nonrecoverable read errors 1 per 1013 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 ST317221A ST313021A ST38410A ST34313A

U8 Family Product Manual, Rev. A 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
ST317221A, ST3130210A, ST38410A and the ST34313A.
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
.
1.2 Physical organization
Drive Model Guaranteed Mbytes
(1 Mbyte = 106bytes) Guaranteed
sectors Bytes per sector
ST317221A 17,245 33,683,328 512
ST313021A 13,022 25,434,228 512
ST38410A 8,622 16,841,664 512
ST34313A 4,327 8,452,080 512
CHS Mode Cylinders Read/Write heads Sectors per track
ST317221A 16,383 16 63
ST313021A 16,383 16 63
ST38410A 16,383 16 63
ST34313A 8,944 15 63
Drive Model Read/Write heads (GMR) Number of discs
ST317221A 4 2
ST313021A 3 2
ST38410A 2 1
ST34313A 1 1

6 U8 Family Product Manual, Rev. A
1.3 Recording and interface technology
1.4 Physical characteristics
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.
Interface ATA
Recording method 24/26 EPRML
Recording density BPI (bits/inch) 349,374
Track density TPI (tracks/inch) 18,700
Areal density (Mbits/inch2max) 6,536
Spindle speed (RPM) (±0.2%) 5,400
Internal data-transfer rate
(Mbits/sec max) 285.5
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 ST31722A, ST313021A
ST38410A, ST34313A
Maximum height (mm)
(inches) 26.1
1.028
Maximum width (mm)
(inches) 101.8
4.020
Maximum length (mm)
(inches) 147.0
5.78
Typical weight (grams)
(pounds) 590
1.3

U8 Family Product Manual, Rev. A 7
•Averageseektimeisatruestatisticalrandom averageofatleast5,000
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-
resentedinthis manual.Physicalseeks,regardless ofmode(suchas
track-to-trackandaverage)areexpectedtomeetorexceedthenoted
values.However,dueto themannerinwhichthesedrivesareformat-
ted, benchmark tests that include command overhead or measure
logicalseeksmay produce resultsthatvaryfromthesespecifications.
1.6 Start/stop times
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.
Typicalseek times (msec) Read Write
Track-to-track 1.5 2.1
Average 10.5 11.5
Full-stroke 23.0 25.0
Average latency: 5.56 msec — —
Power-on to Ready (sec) 10 (typical)
Standby to Ready (sec) 10 (typical)
Ready to spindle stop (sec) 10 (typical)

8 U8 Family Product Manual, Rev. A
•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.

U8 Family Product Manual, Rev. A 9
1.7.1.1 Typical current profile
Figure 1. Typical startup and operation current profile
Power Mode Typical Watts
RMS
Typical Amps RMS
5V 12V
Spinup — 0.5 1.5
Seeking (Random,
no read/write) 7.0 0.4 0.42
Operating (read/write) 6.5 0.42 0.367
Idle 3.5 0.28 0.170
Standby/Sleep 0.8 0.123 0.015
1.4
1.2
1.0
0.8
0.6
0.4
0.2
00123456789
Current (amps)
Time (seconds)

10 U8 Family Product Manual, Rev. A
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): 5V ± 5% and 12V ± 10%
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-
mentthroughthesystem setupprogram.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.
•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
Power Modes Heads Spindle Buffer
Active Tracking Rotating Enabled
Idle Tracking Rotating Enabled
Standby Parked Stopped Enabled
Sleep Parked Stopped Disabled

U8 Family Product Manual, Rev. A 11
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, thedrivemakesa 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.Actualdrivecasetemperatureshould
not exceed 65°C (149°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).
1.8.2 Temperature gradient
Operating 0° to 60°C (32° to 131°F)
Nonoperating –40° to 70°C (–40° to 158°F)
Operating/Nonoperating 20°C/hr (36°F/hour) max,
without condensation

12 U8 Family Product Manual, Rev. A
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 350 Gs (based on nonrepetitive half-sine
shock pulses of 2 msec duration).
1.8.6 Vibration
All vibration specifications assume 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.
Operating 5% to 90% noncondensing (30% per hour max)
Nonoperating 5% to 95% noncondensing (30% per hour max)
Operating 29.4°C (84°F) max
Nonoperating 40.0°C (104°F) max
Operating –61 m to 3,048 m (–200 ft to 10,000+ ft)
Nonoperating –122 m to 12,192 m (–400 ft to 40,000+ ft)

U8 Family Product Manual, Rev. A 13
1.8.6.1 Operating vibration
The following table lists the maximum vibration levels that the drive may expe-
rience whilemeeting the performance standards specified in this document.
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 subsequently put into operation.
1.9 Drive acoustics
Drive acoustics are measured as overall A-weighted acoustic sound
power levels(no puretones). All measurementsaregenerallyconsistent
with ISO document 7779. Sound power measurements were taken
under essentially free-field conditions over a reflecting plane. For all
tests, the drive was oriented with the cover facing upward.
Note. For seek mode tests, the drive was placed in seek mode 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)
5–21 Hz 0.02-inch displacement (peak to peak)
22–350 Hz 0.5 Gs acceleration (zero to peak)
351–500 Hz 0.25 Gs acceleration (zero to peak)
5–21 Hz 0.02-inch displacement (peak to peak)
22–350 Hz 5.0 Gs acceleration (zero to peak)
351–500 Hz 1.0 Gs acceleration (zero to peak)
Acoustic mode Idle mode Seek mode
Sound power (bels) 3.2 (typ) 3.6 (max) 3.5 (typ) 3.9 (max)