Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology LLC
in the United States and/or other countries. SV35 Series, SeaTools and SeaTDD are either trademarks or
registered trademarks of Seagate Technology LLC or one of its affiliated companies in the United States
and/or other countries. All other trademarks or registered trademarks are the property of their respective
owners.
One gigabyte, or GB, equals one billion bytes when referring to hard drive capacity. Accessible capacity
may vary depending on operating environment and formatting. Seagate reserves the right to change, with
out notice, product offerings or specifications.
• State-of-the-art cache and on-the-fly error-correction algorithms.
• Full-track multiple-sector transfer capability without local processor intervention.
• 350 Gs nonoperating shock.
• 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).
• SeaTools diagnostic software performs a drive self-test that eliminates unnecessary drive returns.
• The 3D Defense System™, which includes Drive Defense, Data Defense, and Diagnostic Defense, offers
the industry’s most comprehensive protection for disc drives.
See Section 4.1.5 on page 39 for additional information about Streaming features.
SV35 Series Product Manual, Rev. C1
Page 8
2SV35 Series Product Manual, Rev. C
Page 9
2.0Drive 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
following models:
ST3500641AV
ST3250824AV
ST3160812AV
2.1Specification summaries
The specifications listed in the following three tables are for quick reference. For details on specification measurement or definition, see the appropriate section of this manual.
SV35 Series Product Manual, Rev. C3
Page 10
Table 1: Drive specifications for 500 Gbyte model
Drive specificationST3500641AV
Formatted Gbytes (512 bytes/sector)*500
Guaranteed sectors976,773,168
Bytes per sector512
Default sectors per track63
Default read/write heads16
Default cylinders16,383
Recording density, KBPI (kbits/in max)790.1
Track density, KTPI (ktracks/in max)124.5
Areal density, (Gbits/in2 max)97.96
Spindle speed (RPM)7,200
Internal data transfer rate (Mbits/sec max)815.2
Sustained data transfer rate (Mbytes/sec max)65.0
I/O data-transfer rate (Mbytes/sec max)100
ATA data-transfer modes supportedPIO modes 0–4
Cache buffer16 Mbytes
Height (mm max)26.1 mm (1.028 inches)
Width (mm max)101.6 mm (4.000 inches) +/- 0.010 inches
Length (mm max)146.99 mm (5.787 inches)
Weight (typical) 710 grams (1.57 lb.)
Average latency (msec)4.16
Power-on to ready (sec max)16 sec
Standby to ready (sec max)16 sec
Track-to-track seek time (msec typical)<0.8 (read), <1.0 (write)
Average seek (msec typical)18 (read), 20 (write)
Startup current (typical) 12V (peak)2.0 amps
Seek power (typical)8.6 watts
DVR Operating (typical)7.47 watts
Idle mode (typical)6.90 watts
Standby mode (typical)0.80 watts
Sleep mode (typical)0.80 watts
Voltage tolerance (including noise)5V ± 5%
Ambient temperature 0° to 60°C (operating)
Temperature gradient (°C per hour max)20°C (operating)
Relative humidity5% to 90% (operating)
Relative humidity gradient30% per hour max
Wet bulb temperature (°C max)37.7 (operating)
Altitude, operating–60.96 m to 3,048 m
Altitude, nonoperating (below mean sea level, max)–60.96 m to 12,192 m
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
**During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and
power to operational levels.
22-350 Hz: 0.5 Gs
350-500 Hz: 0.25 Gs
22-350 Hz: 5.0 Gs
350-500 Hz: 1.0 Gs
2.96 (max)
2.88 (max)
14
bits read
To determine the warranty for a specific drive, use a web browser
to access the following web page:
www.seagate.com/support/service/
From this page, click on the “Verify Your Warranty” link. You will be
asked to provide the drive serial number, model number (or part
number) and country of purchase. The system will display the war
ranty information for your drive.
-
SV35 Series Product Manual, Rev. C5
Page 12
Table 2: Drive specifications for 250 Gbyte model
Drive specificationST3250824AV
Formatted Gbytes (512 bytes/sector)*250
Guaranteed sectors488,397,168
Bytes per sector512
Default sectors per track63
Default read/write heads16
Default cylinders16,383
Recording density, KBPI (kbits/in max)790.1
Track density, KTPI (ktracks/in max)124.5
Areal density, (Gbits/in2 max)97.69
Spindle speed (RPM)7,200
Internal data transfer rate (Mbits/sec max)867.2
Sustained data transfer rate (Mbytes/sec max)76.6
I/O data-transfer rate (Mbytes/sec max)100
ATA data-transfer modes supportedPIO modes 0–4
Cache buffer8 Mbytes
Height (mm max)26.1 mm (1.028 inches)
Width (mm max)101.6 mm (4.000 inches) +/- 0.010 inches
Length (mm max)146.99 mm (5.787 inches)
Weight (typical) 580 grams (1.28 lb.)
Average latency (msec)4.16
Power-on to ready (sec max)16 sec
Standby to ready (sec max)16 sec
Track-to-track seek time (msec typical)<0.8 (read), <1.0 (write)
Average seek (msec typical)18 (read), 20 (write)
Startup current (typical) 12V (peak)2.0 amps
Seek power (typical)8.6 watts
DVR Operating (typical)6.50 watts
Idle mode (typical)8.00 watts
Standby mode (typical)0.80 watts
Sleep mode (typical)0.80 watts
Voltage tolerance (including noise)5V ± 5%
Ambient temperature0° to 60°C (operating)
Temperature gradient (°C per hour max)20°C (operating)
Relative humidity5% to 90% (operating)
Relative humidity gradient30% per hour max
Wet bulb temperature (°C max)37.7 (operating)
Altitude, operating–60.96 m to 3,048 m
Altitude, nonoperating (below mean sea level, max)–60.96 m to 12,192 m
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
**During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and
power to operational levels.
22-350 Hz: 0.5 Gs
350-500 Hz: 0.25 Gs
22-350 Hz: 5.0 Gs
350-500 Hz: 1.0 Gs
2.82 (max)
2.80 (max)
14
bits read
To determine the warranty for a specific drive, use a web browser
to access the following web page:
www.seagate.com/support/service/
From this page, click on the “Verify Your Warranty” link. You will be
asked to provide the drive serial number, model number (or part
number) and country of purchase. The system will display the
warranty information for your drive.
SV35 Series Product Manual, Rev. C7
Page 14
Table 3: Drive specifications for 160 Gbyte model
Drive specificationST3160812AV
Formatted Gbytes (512 bytes/sector)*160
Guaranteed sectors312,581,808
Bytes per sector512
Default sectors per track63
Default read/write heads16
Default cylinders16,383
Recording density, KBPI (kbits/in max)840.0
Track density, KTPI (ktracks/in max)141.5
Areal density, (Gbits/in2 max)119.0
Spindle speed (RPM)7,200
Internal data transfer rate (Mbits/sec max)867.2
Sustained data transfer rate (Mbytes/sec max)83.0
I/O data-transfer rate (Mbytes/sec max)100
ATA data-transfer modes supportedPIO modes 0–4
Cache buffer8 Mbytes
Height (mm max)26.1 mm (1.028 inches)
Width (mm max)101.6 mm (4.000 inches) +/- 0.010 inches
Length (mm max)146.99 mm (5.787 inches)
Weight (typical) 580 grams (1.28 lb.)
Average latency (msec)4.16
Power-on to ready (sec max)16 sec
Standby to ready (sec max)16 sec
Track-to-track seek time (msec typical)<0.8 (read), <1.0 (write)
Average seek (msec typical)18 (read), 20 (write)
Startup current (typical) 12V (peak)2.0 amps
Seek power (typical)8.6 watts
DVR Operating (typical)5.71 watts
Idle mode (typical)8.00 watts
Standby mode (typical)0.80 watts
Sleep mode (typical)0.80 watts
Voltage tolerance (including noise)5V ± 5%
Ambient temperature 0° to 60°C (operating)
Temperature gradient (°C per hour max)20°C (operating)
Relative humidity5% to 90% (operating)
Relative humidity gradient30% per hour max
Wet bulb temperature (°C max)37.7 (operating)
Altitude, operating–60.96 m to 3,048 m
Altitude, nonoperating (below mean sea level, max)–60.96 m to 12,192 m
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
**During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and
power to operational levels.
22-350 Hz: 0.5 Gs
350-500 Hz: 0.25 Gs
22-350 Hz: 5.0 Gs
350-500 Hz: 1.0 Gs
2.64 (max)
2.9 (max)
14
bits read
To determine the warranty for a specific drive, use a web
browser to access the following web page:
www.seagate.com/support/service/
From this page, click on the “Verify Your Warranty” link.
You will be asked to provide the drive serial number, model
number (or part number) and country of purchase. The
system will display the warranty information for your drive.
SV35 Series Product Manual, Rev. C9
Page 16
2.2Formatted capacity
Model
ST3500641AV500 Gbytes976,773,168512
ST3250824AV250 Gbytes488,397,168512
ST3160812AV160 Gbytes312,581,808512
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
Formatted
capacity*
Guaranteed
sectors
Bytes per sector
2.2.1LBA mode
When addressing these drives 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.
See Section 4.1.2, "Identify Device command" (words 60-61 and 100-103) for additional information about 48bit addressing support of drives with capacities over 137 Gbytes.
2.3Default logical geometry
CylindersRead/write headsSectors per track
16,3831663
LBA mode
When addressing these drives 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.
Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using
drive diagnostics. 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.
Typical seek times (msec)Read Write
Track-to-track0.81.0
Average1820
Average latency:4.164.16
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.
However, due to the manner in which these drives are formatted, benchmark tests that include command
overhead or measure logical seeks may produce results that vary from these specifications.
2.7Start/stop times
Power-on to Ready (sec)16
Standby to Ready (sec)16 (max)
Ready to spindle stop (sec)10 (max)
12SV35 Series Product Manual, Rev. C
Page 19
2.8Power specifications
The drive receives DC power (+5V and +12V) through a four-pin standard drive power connector.
2.8.1Power consumption
Power requirements for the drives are listed in the table on page 13. Typical power measurements are based
on an average of drives tested, under nominal conditions, using +5.0V and +12.0V 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 represents the worstcase power consumption, using only random seeks with read or write latency time. This mode is not typical
and is provided for worst-case information.
• Operating power and current
Operating power is measured using a standard Surveillance Storage Profile.
• 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.
Table 4: DC power requirements
Power dissipation (watts)
Example: ST3500641AV
Spinup ——2.0 (peak)
Idle6.90.3530.519
Operating (DVR Storage Profile)7.47.295.5
Seeking8.6.318.585
Standby0.800.1060.023
Sleep0.800.1060.023
Average
(watts, 25° C)
5V typ
amps
12V typ
amps
SV35 Series Product Manual, Rev. C13
Page 20
2.8.1.1Typical current profile
Figure 1 Typical 5V startup and operation current profile
Figure 2 Typical 12V startup and operation current profile
2.8.2Conducted 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 voltage by the typical RMS read/write
current.
2.8.3Voltage tolerance
Voltage tolerance (including noise):
5V ± 5%
12V ± 10%
14SV35 Series Product Manual, Rev. C
Page 21
2.8.4Power-management modes
The drive provides programmable power management to provide greater energy efficiency. In most systems,
you can control power management through the system setup program. The drive features the following
power-management modes:
Power modeHeadsSpindleBuffer
ActiveTrackingRotatingEnabled
IdleTrackingRotatingEnabled
StandbyParked StoppedEnabled
SleepParkedStoppedDisabled
• 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 established using a Standby or Idle command. In Standby
mode, thedrive 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 Standby
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 is required, the drive makes a transition to Standby mode. In both Idle and Standby mode, the drive
accepts all commands and returns to Active mode when disc access is necessary.
SV35 Series Product Manual, Rev. C15
Page 22
2.9Environmental specifications
2.9.1Ambient temperature
Ambient temperature is defined as the temperature of the environment immediately surrounding the drive.
Actual drive case temperature should not exceed
standard models. Recommended measurement locations are shown in See Figure 6 on page 27.
Above 1,000 feet (305 meters), the maximum temperature is derated linearly to 44°C (112°F) at 10,000 feet
(3,048 meters).
Operating:0° to 60°C (32° to 140°F)
Nonoperating:–40° to 70°C (–40° to 158°F)
2.9.2Temperature gradient
Operating:20°C per hour (68°F per hour max), without condensation
Nonoperating:30°C per hour (86°F per hour max)
2.9.3Humidity
69°C (156°F) within the operating ambient conditions for
2.9.3.1Relative humidity
Operating:5% to 90% noncondensing (30% per hour max)
Nonoperating:5% to 95% noncondensing (30% per hour max)
2.9.3.2Wet bulb temperature
Operating:37.7°C (99.9°F max)
Nonoperating:40°C (104°F max)
2.9.4Altitude
Operating:–60.96 m to 3,048 m (–200 ft. to 10,000+ ft.)
Nonoperating:–60.96 m to 12,192 m (–200 ft. to 40,000+ ft.)
16SV35 Series Product Manual, Rev. C
Page 23
2.9.5Shock
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.
2.9.5.1Operating shock
These drives comply with the performance levels specified in this document 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.
2.9.5.2Nonoperating shock
The nonoperating shock level that the drive can experience without incurring physical damage or degradation
in performance when subsequently put into operation is 300 Gs for 500 GB drives and 350 Gs for 250 and 160
GB drives, based on a nonrepetitive half-sine shock pulse of 2 msec duration.
2.9.6Vibration
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.
2.9.6.1Operating 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+/-0.25”, Displacement limited
22–350 Hz0.50 Gs
350–500 Hz0.25 Gs
2.9.6.2Nonoperating 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.
5–22 Hz0.25 Gs (Limited displacement)
22–350 Hz5.0 Gs
350–500 Hz1.0 Gs
SV35 Series Product Manual, Rev. C17
Page 24
2.10Acoustics
Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). All measurements are 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.
Note. For seek mode tests, the drive is 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)
Drive acoustics, sound power
ModelIdleOperational, DVR (Digital Video Recorder) seeks
ST3500641AV2.79 bels (typ)
2.96 bels (max)
ST3250824AV2.67 bels (typ)
2.82 bels (max)
ST3160812AV2.48 bels (typ)
2.64 bels (max)
2.71 bels (typ)
2.88 bels (max)
2.68 bels (typ)
2.80 bels (max)
2.80 bels (typ)
2.90 bels (max)
18SV35 Series Product Manual, Rev. C
Page 25
2.11Electromagnetic immunity
When properly installed in a representative host system, the drive operates without errors or degradation in
performance when subjected to the radio frequency (RF) environments defined in the following table:
Nonrecoverable read errors1 per 1014 bits read, max.
Annualized Failure Rate (AFR)<1% (nominal power, 8760 power on hours, 25°C ambient temperature)
Contact start-stop cycles 50,000 cycles
(at nominal voltage and temperature, with 60 cycles per hour and a 50% duty cycle)
Preventive maintenanceNone required
SV35 Series Product Manual, Rev. C19
Page 26
2.13Agency certification
2.13.1Safety 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.
2.13.2Electromagnetic compatibility
Hard drives that display the CE mark comply with the European Union (EU) requirements specified in the Electromagnetic Compatibility Directive (89/336/EEC). Testing is performed to the levels specified by the product
standards for Information Technology Equipment (ITE). Emission levels are defined by EN 55022, Class B and
the immunity levels are defined by EN 55024.
Seagate uses an independent laboratory to confirm compliance with the EC directives specified in the previous
paragraph. Drives are tested in representative end-user systems. Although CE-marked Seagate drives 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 confirm EMC compliance and provide CE marking for their products.
Korean RRL
If these drives have the Korea Ministry of Information and Communication (MIC) logo, they comply with paragraph 1 of Article 11 of the Electromagnetic Compatibility control Regulation and meet the Electromagnetic
Compatibility (EMC) Framework requirements of the Radio Research Laboratory (RRL) Ministry of Information
and Communication Republic of Korea.
These drives have been tested and comply with the Electromagnetic Interference/Electromagnetic Susceptibility (EMI/EMS) for Class B products. Drives are tested in a representative, end-user system by a Korean-recognized lab.
• EUT name (model numbers): See table below.
• Certificate numbers:
ModelCertificate Number
ST3500641AVE-H011-05-3453 (B)
ST3250824AVE-H011-05-3453 (B)
ST3160812AVE-H011-05-3453 (B)
• Trade name or applicant: Seagate Technology
• Manufacturing date: March 2006
• Manufacturer/nationality: Singapore and China
Australian C-Tick (N176)
If these models have the C-Tick marking, they comply with the Australia/New Zealand Standard AS/NZS3548
1995 and meet the Electromagnetic Compatibility (EMC) Framework requirements of the Australian Communication Authority (ACA).
2.13.3FCC 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 considered to be a subassembly even when it is individually marketed to the customer. As a subassembly, no Federal Communications Commission verification or certification
of the device is required.
20SV35 Series Product Manual, Rev. C
Page 27
Seagate Technology LLC 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
likely to result in interference to 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 Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402. Refer to publication number 004-000-00345-4.
2.14Environmental protection
Seagate designs its products to meet environmental protection requirements worldwide, including regulations
restricting certain chemical substances.
2.14.1European Union Restriction of Hazardous Substances (RoHS)
The European Union Restriction of Hazardous Substances (RoHS) Directive restricts the presence of chemical
substances, including Lead (Pb), in electronic products effective July 2006.
A number of parts and materials in Seagate products are procured from external suppliers. We rely on the
rep-resentations of our suppliers regarding the presence of RoHS substances in these parts and materials. Our
supplier contracts require compliance with our chemical substance restrictions, and our suppliers document
their compliance with our requirements by providing material content declarations for all parts and materials for
the disc drives documented in this publication. Current supplier declarations include disclosure of the inclusion
of any RoHS-regulated substance in such parts or materials.
Seagate also has internal systems in place to ensure ongoing compliance with the RoHS Directive and all laws
and regulations which restrict chemical content in electronic products. These systems include standard
operat-ing procedures that ensure that restricted substances are not utilized in our manufacturing operations,
labora-tory analytical validation testing, and an internal auditing process to ensure compliance with all standard
operating procedures.
SV35 Series Product Manual, Rev. C21
Page 28
2.15Corrosive environment
Seagate electronic drive components pass accelerated corrosion testing equivalent to 10 years exposure to
light industrial environments containing sulfurous gases, chlorine and nitric oxide, classes G and H per ASTM
B845. However, this accelerated testing cannot duplicate every potential application environment. Users
should use caution exposing any electronic components to uncontrolled chemical pollutants and corrosive
chemicals as electronic drive component reliability can be affected by the installation environment. The silver,
copper, nickel and gold films used in Seagate products are especially sensitive to the presence of sulfide, chloride, and nitrate contaminants. Sulfur is found to be the most damaging. In addition, electronic components
should never be exposed to condensing water on the surface of the printed circuit board assembly (PCBA) or
exposed to an ambient relative humidity greater than 95%. Materials used in cabinet fabrication, such as vulcanized rubber, that can outgas corrosive compounds should be minimized or eliminated. The useful life of any
electronic equipment may be extended by replacing materials near circuitry with sulfide-free alternatives.
22SV35 Series Product Manual, Rev. C
Page 29
3.0Configuring and mounting the drive
This section contains the specifications and instructions for configuring and mounting the drive.
3.1Handling and static discharge precautions
After unpacking, and before installation, the drive may be exposed to potential handling and electrostatic discharge (ESD) hazards. Observe the following standard handling and static-discharge precautions:
Caution:
• Keep the drive in the electrostatic discharge (ESD) bag until you are ready for installation.
• Before handling the drive, put on a grounded wrist strap, or ground yourself frequently by touching the metal
chassis of a computer that is plugged into a grounded outlet. Wear a grounded wrist strap throughout the
entire installation procedure.
• Handle the drive by its edges or frame only.
• The drive is extremely fragile—handle it with care. Do not press down on the drive top cover.
• Always rest the drive on a padded, antistatic surface until you mount it in the computer.
• Do not touch the connector pins or the printed circuit board.
• Do not remove the factory-installed labels from the drive or cover them with additional labels. Removal voids
the warranty. Some factory-installed labels contain information needed to service the drive. Other labels are
used to seal out dirt and contamination.
SV35 Series Product Manual, Rev. C23
Page 30
3.2Breather filter hole precautions
This section contains information regarding the precautions which should be taken regarding the breather filter
hole in Seagate hard disc drives. Proper precautions should be taken to ensure full functionality and prevent
possible damage to the drive.
Breather hole
Do not cover or seal
this hole.
Figure 3 Breather filter hole location
Caution: Do not cover, seal, or insert any object into this hole.
This hole has two purposes:
• To allow condensation inside the hard disc to escape
• To allow air pressure inside the hard disc to equalize with ambient pressure
Note.If this hole is covered, sealed, or penetrated by any object, drive reliability may be compromised
and could lead to permanent damage—doing so voids the warranty.
24SV35 Series Product Manual, Rev. C
Page 31
3.3Jumper settings
3.3.1Master/slave configuration
The options jumper block shown in Figure 4 is used to configure the drive for operation. It is the 8-pin dual
header between the interface connector and the power connector. Use the following settings to configure the
drive as a master or a slave.
Master or single drive. The drive is configured at the factory for a master or single-drive operation with a
jumper set on pins 7 and 8.
Drive as slave. Remove all jumpers.
Drive as master with a non-ATA-compatible slave.
Use this jumper setting only if the drive does not work as a master with no jumpers installed.
Options jumper block
Master or single drive
Drive is slave
Master with non ATAcompatible slave
Cable select
Limit drive capacity
to 32 Gbytes
1753
684
2
Figure 4 Master/slave jumper settings
Circuit Board
3.3.2Cable-select option
Computers that use cable select determine the master and slave drives by selecting or deselecting pin 28,
CSEL, on the interface bus. Master and slave drives are determined by their physical position on the cable. To
enable cable select, set a jumper on pins 5 and 6 as shown in Figure 4. Refer to your computer manual to
determine whether your computer supports this option.
3.3.3Alternate capacity jumper
Some older computers may “hang” at startup if their BIOS detects a disc drive with a capacity greater than 32
Gbytes. This limits the drive’s capacity to 32 Gbytes when the alternate capacity jumper is used. To access the
full capacity of the drive, you can:
• Update the BIOS
• Use third-party software such as DiscWizard™ or Disk Manager
• Use a third-party host adapter
For drives with capacities greater than 32 Gbytes, the alternate capacity jumper changes the total available
LBA sectors to 32 Gbytes to solve issues with some BIOS during power on. The ATA Set Features subcommand “F1
Report Full Capacity Available” causes Identify Data words 60 and 61 to report the full capacity.
H
See Section 4.1.3 on page 37 for more details on the Set Features command.
SV35 Series Product Manual, Rev. C25
Page 32
Windows XP, Windows Me, Windows 98 or newer versions are needed to support drives with capacities
greater than 32 Gbytes.
3.3.4Ultra ATA/100 cable
An 80-conductor 40-pin cable is required to run Ultra DMA mode 3, mode 4 and mode 5. This cable uses evennumbered conductors connected to the ground pins to improve signal integrity.
Note. If you are using a 40-pin, 80-conductor
cable, attach the blue connector to the
Master
Slave
Figure 5 Ultra ATA cable connectors
Pin 1
Computer
Motherboard
motherboard, the black connector to the
master drive, and the gray connector
to the slave.
Note.The drive supports both host and drive cable detection. The host detects the 80-conductor cable by
sampling pin 34, CBLID–, on the interface bus. The drive detects the 80-conductor cable by sens
ing a capacitor at the host side through the CBLID– signal. The result is reported in a Fast Rise
Detected bit (bit 13 of word 93 in the Identify drive parameter block).
3.4Drive 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 6 for drive mounting dimensions. Follow these important mounting precautions when mounting the drive:
• Allow a minimum clearance of 0.030 inches (0.76 mm) around the entire perimeter of the drive for cooling.
• Use only 6-32 UNC mounting screws.
• Do not overtighten the mounting screws (maximum torque: 6 inch-lb.).
• Do not use a drive interface cable that is more than 18 inches long.
Figure 6 Mounting dimensions—top, side and end view
SV35 Series Product Manual, Rev. C27
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28SV35 Series Product Manual, Rev. C
Page 35
4.0ATA 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 0–4; multiword DMA modes 0–2, and Ultra DMA modes 0–5. 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 about
the ATA interface, refer to the draft of AT Attachment with Packet Interface Extension (ATA/ATAPI-7), NCITS T13 1410D, subsequently referred to as the Draft ATA-7 Standard.
4.1ATA interface signals and connector pins
Figure 7 summarizes the signals on the ATA interface connector that the drive supports. For a detailed description of these signals, refer to the Draft ATA-7 Standard.
Drive pin #
1
2
3
4
5
6
7
8
9
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
Pins 28, 34 and 39 are used for master-slave communication (details shown below).
The following table lists ATA-standard commands that the drive supports. For a detailed description of the ATA
commands, refer to the Draft ATA-7 Standard. See “S.M.A.R.T. commands” on page 38 for details and sub-
commands used in the S.M.A.R.T. implementation.
Table 6: Supported ATA commands
Command nameCommand code (in hex)
Check Power Mode98H or E5
Configure Stream51
H
Device Configuration Freeze LockB1H / C1
Device Configuration IdentifyB1H / C2
Device Configuration RestoreB1H / C0
Device Configuration SetB1H / C3
Device Reset08
Download Microcode92
Execute Device Diagnostics90
Flush CacheE7
Flush Cache ExtendedEA
Format Track50
Identify DeviceEC
H
H
H
H
H
H
H
H
H
H
H
H
Idle97H or E3
Idle Immediate95H or E1
Initialize Device Parameters91
Read BufferE4
Read DMA C8
Read DMA Extended25
Read DMA Without RetriesC9
Read Log Ext2F
Read MultipleC4
Read Multiple Extended29
Read Native Max AddressF8
H
H
H
H
H
H
H
H
H
H
H
30SV35 Series Product Manual, Rev. C
Page 37
Command nameCommand code (in hex)
Read Native Max Address Extended27
Read Sectors 20
Read Sectors Extended24
Read Sectors Without Retries21
Read Stream DMA EXT2A
Read Verify Sectors 40
Read Verify Sectors Extended42
Read Verify Sectors Without Retries41
Recalibrate10
Security Disable PasswordF6
Security Erase PrepareF3
Security Erase UnitF4
Security FreezeF5
H
H
H
H
H
H
H
H
H
H
H
H
H
Security Set PasswordF1
Security UnlockF2
Seek70
Set FeaturesEF
Set Max AddressF9
H
H
H
H
H
Note: Individual Set Max Address
commands are identified by the value
placed in the Set Max Features regis
-
ter as defined to the right.
Set Max Address Extended37
Set Multiple ModeC6
H
H
Sleep99H or E6
S.M.A.R.T. Disable OperationsB0H / D9
S.M.A.R.T. Enable/Disable AutosaveB0H / D2
Address:
Password:
Unlock:
Freeze Lock:
H
H
H
Lock:
00
01
02
03
04
H
H
H
H
H
S.M.A.R.T. Enable OperationsB0H / D8
S.M.A.R.T. Execute OfflineB0H / D4
H
H
SV35 Series Product Manual, Rev. C31
Page 38
Command nameCommand code (in hex)
S.M.A.R.T. Read Attribute ThresholdsB0H / D1
S.M.A.R.T. Read DataB0H / D0
S.M.A.R.T. Read Log SectorB0H / D5
S.M.A.R.T. Return StatusB0H / DA
S.M.A.R.T. Save Attribute ValuesB0H / D3
S.M.A.R.T. Write Log SectorB0H / D6
Standby96H or E2
Standby Immediate94H or E0
Write BufferE8
Write DMACA
Write DMA Extended35
Write DMA Without RetriesCB
Write Log Extended3F
H
H
H
H
H
H
H
H
H
H
H
H
H
Write MultipleC5
Write Multiple Extended39
Write Sectors30
Write Sectors Without Retries31
Write Sectors Extended34
Write Stream DMA EXT3A
H
H
H
H
H
H
32SV35 Series Product Manual, Rev. C
Page 39
4.1.2Identify Device command
The Identify Device 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 contents are shown in the Table 6
on page 30. 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 2.0 on page 3 for default parameter settings.
The following commands contain drive-specific features that may not be included in the Draft ATA-7 Standard.
WordDescriptionValue
0
Configuration information:
• Bit 15: 0 = ATA; 1 = ATAPI
• Bit 7: removable media
• Bit 6: removable controller
• Bit 0: reserved
1Number of logical cylinders16,383
2ATA-reserved0000
3Number of logical heads16
4Retired0000
5Retired0000
6Number of logical sectors per logical track: 63003F
23–26Firmware revision (8 ASCII character string, padded with blanks to
x.xx
end of string)
27–46Drive model number
(40 ASCII characters, padded with blanks to end of string)
ST3500641AV
ST3250824AV
ST3160812AV
47(Bits 7–0) Maximum sectors per interrupt on Read multiple and Write
8010
multiple (16)
48Reserved0000
49Standard Standby timer, IORDY supported and may be disabled2F00
50ATA-reserved0000
51PIO data-transfer cycle timing mode0200
52Retired0200
H
H
H
H
H
H
H
H
H
SV35 Series Product Manual, Rev. C33
Page 40
WordDescriptionValue
53Words 54–58, 64–70 and 88 are valid0007
54Number of current logical cylinders xxxx
55Number of current logical heads xxxx
56Number of current logical sectors per logical trackxxxx
57–58Current capacity in sectorsxxxx
59Number of sectors transferred during a Read Multiple or Write Multi-
xxxx
ple command
60–61Total number of user-addressable LBA sectors available
0FFFFFFFh*
(see Section 2.2 for related information)
*Note: The maximum value allowed in this field is: 0FFFFFFFh
(268,435,455 sectors, 137 Gbytes). Drives with capacities over 137
Gbytes will have 0FFFFFFFh in this field and the actual number of
user-addressable LBAs specified in words 100-103. This is required
for drives that support the 48-bit addressing feature.
62Retired0000
63Multiword DMA active and modes supported
xx07
(see note following this table)
H
H
H
H
H
H
H
H
64Advanced PIO modes supported (modes 3 and 4 supported)0003
65Minimum multiword DMA transfer cycle time per word (120 nsec)0078
66Recommended multiword DMA transfer cycle time per word (120
0078
nsec)
67Minimum PIO cycle time without IORDY flow control (240 nsec)00F0
68Minimum PIO cycle time with IORDY flow control (120 nsec) 0078
69–74ATA-reserved0000
75Queue depth0000
76–79SATA-reservedxxxx
80Major version number007E
81Minor version number0000
82Command sets supported346B
83Command sets supported7D01
84Command sets support extension4003
H
H
H
H
H
H
H
H
H
H
H
H
H
85Command sets enabled34xx
H
34SV35 Series Product Manual, Rev. C
Page 41
WordDescriptionValue
86Command sets enabled3xxx
87Command sets enable extension4003
88Ultra DMA support and current mode
xx3F
(see note following this table)
89Security erase time0000
90Enhanced security erase time0000
92Master password revision codeFFFE
93Hardware reset value (see description following this table)xxxx
95–99ATA-reserved0000
100–103Total number of user-addressable LBA sectors available
(see Section 2.2 for related information)
These words are required for drives that support the 48-bit addressing
This command controls the implementation of various 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:
02
03
Enable write cache (default).
H
Set transfer mode (based on value in Sector Count register).
H
Sector Count register values:
00
01
08
09
0A
0B
0C
20
21
22
Set PIO mode to default (PIO mode 2).
H
Set PIO mode to default and disable IORDY (PIO mode 2).
Note.At power-on, or after a hardware or software reset, the default values of the features are as indi-
cated above.
SV35 Series Product Manual, Rev. C37
Page 44
4.1.4S.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 Draft ATA-7 Standard.
SeaTools diagnostic software activates a built-in drive self-test (DST S.M.A.R.T. command for D4
) that elimi-
H
nates unnecessary drive returns. The diagnostic software ships with all new drives and is also available at:
http://seatools.sea
gate.com.
This drive is 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 this feature. The table below shows the S.M.A.R.T. command codes that the
drive uses.
Code in features
registerS.M.A.R.T. command
D0
D1
D2
D3
D4
D5
D6
D7
H
H
H
H
H
H
H
H
S.M.A.R.T. Read Data
Vendor-specific
S.M.A.R.T. Enable/Disable Attribute Autosave
S.M.A.R.T. Save Attribute Values
S.M.A.R.T. Execute Off-line Immediate (runs DST)
S.M.A.R.T. Read Log Sector
S.M.A.R.T. Write Log Sector
Vendor-specific
D8
D9
DA
H
H
H
S.M.A.R.T. Enable Operations
S.M.A.R.T. Disable Operations
S.M.A.R.T. Return Status
Note.If an appropriate code is not written to the Features Register, the command is aborted and 0x 04
(abort) is written to the Error register.
38SV35 Series Product Manual, Rev. C
Page 45
4.1.5Streaming feature set support
The Streaming feature set is an optional feature set that allows a host to request delivery of data from a contiguous logical block address range within an allotted time. This places a higher priority on time to access the
data than the integrity of the data. Streaming feature set commands only support 48-bit, LBA-mode-only
addressing.
Seagate implements the following Streaming commands:
• CONFIGURE STREAM
• READ STREAM DMA EXT
• WRITE STREAM DMA EXT
Command Completion Time Out (CCTO) errors are not deferrable on DMA operations, as they require some
DMA engine clean up on the host side. Therefore, Seagate does not anticipate supporting any configurations
where a CCTO needs to hide from reporting as an error, and simply show up in a Stream Error log. Since the
Stream Error logs were intended to be used to report deferred errors such as this, Seagate has not implemented them.
4.1.5.1Identify Device command
These drives will set word 84 bit 4 (Streaming Feature Set Supported) and word 87 bit 4 (Configure Stream
command was issued) when a non-zero default time limit has been set for either reading or writing. If the host
reconfigures both defaults to 0, the bit will clear.
Word 95 (Stream Minimum Request Size)
World 95 contains the number of sectors that provide optimum performance in a streaming environment. This
number shall be a power of two, with a minimum of eight sectors (4096 bytes). The starting LBA value for each
streaming command should be evenly divisible by this request size.
Words 96, 97, and 104
Unsupported.
Words 99:98
These words define the fixed unit of time that is used only in the Command Completion Time Limit (CCTL) that
is passed in streaming commands. The unit of time for this parameter is microseconds. For example, a value of
50000 indicates 50 ms.
4.1.5.2Streaming commands
Streaming commands are defined to be time-critical data transfers rather than the standard data-integrity-critical commands. Each command shall be completed within the time specified in the CONFIGURE STREAM
command or in the streaming command itself to ensure the stream requirements of the AV-type application.
The drive may execute background tasks as long as the READ STREAM and WRITE STREAM command execution time limits are still met.
The host may use the CONFIGURE STREAM command to define the default Command Completion Time
Limit (CCTL) for reads and writes independently--this assists the device in setting up its caching for best performance. If the host does not use a CONFIGURE STREAM command, the device shall use the CCTL specified in each streaming command, and the time limit is effective for one time only. If the CCTL is not set by a
CONFIGURE STREAM command, the operation of a streaming command with a zero CCTL is device vendor
specific. "Stream ID" as noted in the ATA specification is not used by the Seagate implementation.
SV35 Series Product Manual, Rev. C39
Page 46
The streaming commands may access any user LBA on a device. These commands may be interspersed with
non-streaming commands, but there may be an impact on performance due to the unknown time required to
complete the non-streaming commands.
The streaming commands should be issued using a specified minimum number of sectors transferred per command, as specified in word 95 of the IDENTIFY DEVICE response. The transfer length of a request should be
a multiple of the minimum number of sectors per transfer, as should the starting LBA of any streaming command.
Urgent bit
The Urgent bit in the READ STREAM and WRITE STREAM commands is ignored. Therefore, bits 9 and 10 of
IDENTIFY DEVICE data words 84 and 87 shall remain clear.
Flush to Disk bit
The Flush to Disk bit in the WRITE STREAM command specifies that all data for the specified stream shall be
flushed to the media before posting command completion. If a host requests flushes at times other than the
end of each Allocation Unit, streaming performance may be degraded. Using the SET FEATURES command
to enable/disable caching may not affect caching for streaming commands.
Not Sequential bit
The Not Sequential bit specifies that the next LBA(s) after those requested in the current READ STREAM command are not anticipated to be used in a subsequent READ STREAM command. This information may help
the device with pre-fetching decisions.
Read Continuous bit
If the Read Continuous bit is set to 1 for the command, the device shall attempt to transfer the requested
amount of data to the host within the Command Completion Time Limit even if an error occurs. The data sent to
the host by the device in an error condition is vendor specific.
Write Continuous bit
If the Write Continuous bit is set to 1 for the command and an error is encountered, the device shall still attempt
to complete the transfer within the requested time. If an error occurs and cannot be resolved within the Command Completion Time Limit, the erroneous section on the media may be unchanged or may contain undefined data. A future read of this area may not report an error, even though the data is erroneous. If the Flush Bit
is set to 1 on the STREAM WRITE command and the data cannot successfully be written to the media, then
the drive will report a Stream Error on the command.
Handle Streaming Error bit
The Handle Streaming Error bit specifies to the drive that this command starts at the LBA of a recently reported
error section, so the device may attempt to continue its corresponding error recovery sequence where it left off
earlier. This mechanism allows the host to schedule error recovery and defect management for content critical
data.
40SV35 Series Product Manual, Rev. C
Page 47
4.1.5.2.1Configure Stream (51h)
The Configure Stream command specifies the default CCTL (Command Completion Time Limit) for streaming
commands, and informs the drive of the Allocation Unit size and alignment.
Protocol: non-data
Register76543210
Features
Sector Count
LBA Low, Mid, High
DeviceobsIgnoredobsDEVReserved
Command51h
Note: The value indicated as Current is the value most recently written to the register. The value indicated as Previous is
the value that was in the register before the most recent write to the register.
CurrentIgnoredR/WReservedIgnored
PreviousDefault CCTL (7:0)
CurrentAU Size In Sectors (7:0)
PreviousAU Size In Sectors (15:8)
CurrentReserved
PreviousReserved
FEATURES REGISTER FIELD DESCRIPTIONS
R/W
0Read stream
1Write stream
Default CCTL (Default Command Completion Time Limit)
This value is calculated as follows (with the unit of measure being microseconds):
Default CCTL = ((content of the Features register) * (IDENTIFY DEVICE words (99:98))
This time shall be used by the drive when an individual streaming command with a CCTL of 0 is issued. The
time is measured from the write of the command register to the final INTRQ for command completion.
SECTOR COUNT REGISTER FIELD DESCRIPTIONS
Current
The size of an Allocation Unit in sectors (bits 7:0).
Previous
The size of an Allocation Unit in sectors (bits 15:8)
DEVICE REGISTER FIELD DESCRIPTIONS
Dev
The selected device.
SV35 Series Product Manual, Rev. C41
Page 48
4.1.5.2.2Read Stream DMA (2Ah)
Protocol: DMA In
This command reads from 1 to 65536 sectors as specified in the Sector Count register. A value of 0000h in the
Sector Count register requests 65536 sectors.
The RC bit indicates that the drive operate in a continuous read mode for the READ STREAM command.
When RC is set to 0, the drive shall operate in normal streaming read mode.
When the Read Continuous mode is enabled, the drive shall attempt to transfer data of the requested length
without setting the ERR bit to 1. The SE bit shall be set to 1 if the data transferred includes errors, unless the
transfer is unable to finish within the CCTL, in which case a CCTO error will be reported (see below). If an error
is encountered, it may be necessary for the drive to pad the data being transferred to fulfill the host's requested
transfer size. The implementation of the padding is vendor specific.
If the drive is unable to transfer the correct amount of data by the CCTL, the drive will set the ERR bit to 1 and
the BSY bit to 0 in the Status Register, and the CCTO bit to 1 in the Error Register.
Register76543210
Features
Sector Count
LBA Low, Mid, High
DeviceobsLBAobsDEVReserved
Command2Ah
Note: The value indicated as Current is the value most recently written to the register. The value indicated as Previous is
the value that was in the register before the most recent write to the register.
CurrentIgnoredRCNSIgnoredrIgnored
PreviousCommand Completion Time Limit (7:0)
CurrentSector count
Previous
CurrentLBA
Previous
FEATURES REGISTER FIELD DESCRIPTIONS
RC (Read Continuous mode enabled)
Regardless of the RC setting, if it is not possible to transfer the full amount of data that the host requested
before the CCTL, the drive shall provide ending status with the BSY bit cleared to 0, the SE bit set to 0, the
ERR bit set, and the CCTO bit set in the Error Register.
NS (Not Sequential)
This bit specifies that the next LBAs after those requested in the current READ STREAM command are not
anticipated to be read in a near-future read stream command.
Features Register Previous
The time allowed for the current command’s completion. This is calcuated as follows:
CCTL = (content of the Features Register Previous) * (IDENTIFY DEVICE words (99:98))
42SV35 Series Product Manual, Rev. C
Page 49
If the value is 0, the drive shall use the Default Command Completion Time Limit supplied with the most recent
previous CONFIGURE STREAM command for this Stream type (Read or Write). If the Default Command Completion Time Limit is 0, or no previous Configure Stream command was defined for this Stream type, the result
is vendor specific. The time is measured from the write of the command register to the final INTRQ for command completion.
SV35 Series Product Manual, Rev. C43
Page 50
Error Outputs
If the RC bit is set to 0, the content of the registers shall be as shown below. If the RC bit is set to 1 and the
drive was able to transfer the correct amount of data (even though some of it may be incorrect), the SE bit shall
be set to 1, the ERR bit shall be set to 0.
Register76543210
ErrorICRCUNCN/AIDNFN/AABRTN/ACCTO
Sector Count
LBA Low
LBA Mid
LBA High
DeviceobsN/AobsDEVReserved
StatusBSYDRDYSEUnusedDRQN/AN/AERR
Note: HOB = 0 indicates the value read by the host when the HOB bit of the Device Control register is cleared to zero.
HOB = 1 indicates the value read by the host when the HOB bit of the Device Control register is set to one.
HOB = 0Length of Stream Error (7:0)
HOB = 1Length of Stream Error (15:8)
HOB = 0LBA (7:0)
HOB = 1LBA (31:24)
HOB = 0LBA (15:8)
HOB = 1LBA (39:32)
HOB = 0LBA (23:16)
HOB = 1LBA (47:40)
ERROR REGISTER FIELD DESCRIPTIONS
ICRC (Interface CRC Error)
1This bit shall be set to 1 if an interface CRC error has occurred during an Ultra DMA data transfer. The
content of this bit is not applicable for Multiword DMA transfers.
UNC (Uncorrectable)
1This bit shall be set to 1 if data is uncorrectable. This bit should never be set on a streaming command.
IDNF
1This bit shall be set to 1 if a user-accessible address could not be found. This bit shall be set to 1 if an
address outside of the range of user-accessible addresses is requested if command aborted is not
returned.
ABRT
1This bit shall be set to 1 if this command is not supported. ABRT may be set to 1 if the device is not
able to complete the action requested by the command. ABRT shall be set to 1 if an address outside of
the range of user-accessible addresses is requested if IDNF is not set to 1.
CCTO (Command Completion Time Out)
1This bit shall be set to 1 if a Command Completion Time Out error has occurred.
44SV35 Series Product Manual, Rev. C
Page 51
SECTOR COUNT REGISTER FIELD DESCRIPTIONS
LBA Low/Mid/High
The address of the first uncorrectable error.
DEVICE REGISTER FIELD DESCRIPTIONS
DEV
This field indicates the selected device.
STATUS REGISTER FIELD DESCRIPTIONS
BSY
0This bit shall be set to 0 indicating command completion.
DRDY
1
SE (Stream Error)
1This bit shall be set to one if the data contained erroneous data (even though the correct amount of
data was transferred to the host). In this case, the LBA returned in the Sector Number registers shall
be the address of the first sector in error, and the Sector Count registers shall contain the number of
consecutive sectors that may contain errors.
DRQ
0This bit shall be set to 0.
ERR
1This bit shall be set to 1 if an Error register bit is set to 1.
SV35 Series Product Manual, Rev. C45
Page 52
4.1.5.3Write Stream DMA (3Ah)
Protocol: DMA Out
The Write Stream DMA command allows the host to write data using the DMA data transfer protocol. This command allows for the host to specify to the device that additional actions need to be performed prior to the completion of the command if the required bits are set.
If the Write Continuous bit is set to 1, the device shall attempt to not stop execution of the command due to
errors. If the WC bit is set to 1 and errors occur in the transfer or writing of the data, the device shall attempt to
continue to transfer the amount of data requested and then provide ending status with the BSY bit cleared to
zero, the SE bit set to 1, the ERR bit cleared to 0. If the WC bit is set to 1 and the Command Completion Time
Limit expires, the device shall stop execution of the command and provide ending status with the BSY bit
cleared to 0, the SE bit clear, the ERR bit set, and report the fact that the Command Completion Time Limit
expired by setting the CCTO bit in the error register. In all cases, the drive shall attempt to transfer the amount
of data requested within the Command Completion Time Limit even if some data transferred is in error.
Additionally, if the F bit is set for a Write Stream command, the drive shall conclude processing for the command (including flushing it to the media) before posting status.
Register76543210
Features
Sector Count
LBA Low, Mid, High
DeviceobsLBAobsDEVReserved
Command3Ah
Note: The value indicated as Current is the value most recently written to the register. The value indicated as Previous is
the value that was in the register before the most recent write to the register.
CurrentIgnoredWCFIgnoredrIgnored
PreviousCommand Completion Time Limit (7:0)
CurrentSector count
Previous
CurrentLBA
Previous
FEATURES REGISTER FIELD DESCRIPTIONS
WC (Write Continuous)
This bit indicates if Write Continuous mode is enabled.
1The device shall attempt to not stop execution of the command due to errors. If the WC bit is set to 1
and errors occur in the transfer or writing of data, the device shall attempt to continue to transfer the
amount of data requested, and then provide ending status with the BSY bit cleared to 0, the SE bit set
to 1, and the ERR bit cleared to 0. If the WC bit is set to 1 and the Command COmpletion Time Limit
expires, te device shall stop execution of the command and provide ending status with the BSY bit
cleared to 0, the SE bit clear, the ERR bit set, and report the fact that the Command Completion Time
Limit expired by setting the CCTO bit in the error register to 1. In all cases, the device shall attempt to
transfer the amount of data requested within the Command Completion Time Limit even if some data
transferred is in error.
46SV35 Series Product Manual, Rev. C
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F
1This bit specifies that all data for the specified stream shall be flushed to the media before command
complete is reported.
CCTL (Command Completion Time Limit)
The time allowed for the current command to complete. This value is calculated as follows:
CCTL = (content of the Features register Previous) * (IDENTIFY DEVICE data words (99:98)) microseconds
0The device shall use the Default Command Completion Time Limit supplied with the most recent previ-
ous CONFIGURE STREAM command for this Stream type (Read or Write). If the Default Command
Completion Time Limit = 0, or no previous Configure Stream command was defined for this Stream ID,
the result is vendor specific. The time is measured from the write of the command register to the final
INTRQ for command completion.
Error Outputs
If the WC bit is set to 0, the content of the registers shall be as shown below. If the WC bit is set to 1 and the
drive was able to transfer the correct amount of data (even though some of it may be written incorrectly to the
media), the SE bit shall be set to 1 and the ERR bit shall be set to 0.
Register76543210
ErrorICRCN/AN/AIDNFN/AABRTN/ACCTO
Sector Count
LBA Low
LBA Mid
LBA High
DeviceobsN/AobsDEVReserved
StatusBSYDRDYSEUnusedDRQN/AN/AERR
Note: HOB = 0 indicates the value read by the host where the HOB bit of the Device Control register is set to 0. HOB = 1
indicates the value read by the host when the HOB bit of the Device Control register is set to 1.
HOB = 0Length of Stream Error (7:0)
HOB = 1Length of Stream Error (15:8)
HOB = 0LBA (7:0)
HOB = 1LBA (31:24)
HOB = 0LBA (15:8)
HOB = 1LBA (39:32)
HOB = 0LBA (23:16)
HOB = 1LBA (47:40)
ERROR REGISTER FIELD DESCRIPTIONS
ICRC
1This bit shall be set to 1 if an interface CRC error has occurred during an Ultra DMA data transfer. The
content of this bit is not applicable for Multiword DMA transfers.
SV35 Series Product Manual, Rev. C47
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IDNF
1This bit shall be set to 1 if a user-accessible address could not be found. IDNF shall be set to 1 if an
address outside of the range of user-accessible addresses is requested if command aborted is not
returned.
ABRT
1This bit shall be set to 1 if this command is not supported. ABRT may be set to 1 if the device is not
able to complete the action requested by the command. ABRT shall be set to 1 if an address outside of
the range of user-accessible addresses is requested if IDNF is not set to 1.
CCTO
1This bit shall be set to 1 if a Command Completion Time Out error has occurred.
SECTOR COUNT REGISTER FIELD DESCRIPTIONS
Current, Previous
These bits contain the number of contiguous sectors potentially written unsuccessfully, or with bad data, beginning with the LBA of the first corrupted sector.
LBA (Low, Mid, High) (Current, Previous)
These bits contain the address of the first potentially corrupted sector.
DEVICE REGISTER FIELD DESCRIPTIONS
DEV
This bit shall indicate the selected device.
STATUS REGISTER FIELD DESCRIPTIONS
BSY
0This bit shall be set to 0 indicating command completion.
DRDY
1This bit shall be set to 1.
SE (Stream Error)
1This bit shall be set to 1 if an error has occurred during the execution of the command when the WC bit
is set to 1 and the correct amount of data was transferred from the host. In this case, the LBA returned
in the Sector Number registers shall be the address of the first sector in error, and the Sector Count
registers shall contain the number of consecutive sectors that may contain errors.
DRQ
0This bit shall be set to 0.
ERR
1This bit shall be set to 1 if an Error register bit is set to 1 and the WC bit is set to 0, or if the drive was
unable to transfer the correct amount of data to the host.
4.1.5.3.1Time-constrained operations
In general, time constraints have impacts not only on data transfer between the drive and the host, but also on
the drive’s internal motion and movement of data to and from the internal buffer (cache). If the drive moves its
actuator to access some data other than what the host is (or shortly will be) accessing, there will be an
unavoidable delay before the actuator can be moved to where the host needs it to be to service a command.
48SV35 Series Product Manual, Rev. C
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If write caching is allowed, the actuator could be busy servicing a cached write at virtually any time. The implication is that a timeout on a read command could actually be due to a cached write. To address this case:
• Streaming commands will not time out if there is a non-streaming cached write in progress
• all cached write data is discarded if a timeout occurs on a streaming command
• when the host issues a streaming read to the drive, internal drive activity is limited to minimize the chances
that significant time will be spent on a normal write, and
• timeouts are inhibited if this case is occurring.
4.1.5.3.2Non-cached streaming writes use model
The host can issue streaming writes. If this is done, it is recommended that the host either set the F bit or disable write caching. If the host does neither, the drive has no way to accurately report the failure location and
length in the event of a write failure on a cached write. Disabling caching or using the F bit will cause some performance loss compared to the case where caching was allowed. The most straightforward way to ensure that
performance is maintained in this usage model is for the host to issue large writes, so that the seek time is
insignificant when compared to the amount of time that the host can allow the command to consume. If the
host’s time limit allows, the drive will perform internal defect management on any defective sectors encountered. If the drive runs out of time during a write of this type, any currently cached sectors in the drive’s buffer
will be discarded. If the error occured in the LBA range of the current command (rather than a cached command), the portion of that write that may not have been successfully written to the media will be reported to the
host in the ending status of the write command.
4.1.5.3.3Non-streaming writes
In non-streaming writes, the drive does not discard any write data, but rather protects the data as if it were in a
non-timed environment altogether. The cache algorithm ensures that if a write to the media is begun, it will be
finished during the write command on the ATA bus, and will not adversely affect a streaming read.
A system may use this mode during boot, and then switch over to Streaming Writes for operational mode, back
again to untimed mode for maintenance, etc. This behavior can be safe as long as a Flush Cache command is
issued and completed before switching between write command types.
SV35 Series Product Manual, Rev. C49
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50SV35 Series Product Manual, Rev. C
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5.0Seagate Technology support services
Internet
For information regarding Seagate products and services, visit www.seagate.com. Worldwide support is
available 24 hours daily by email for your questions.
Presales Support:
Presales@Seagate.com
Technical Support:
DiscSupport@Seagate.com
Warranty Support:
http://www.sea
mySeagate
my.seagate.com is the industry's first Web portal designed specifically for OEMs and distributors. It provides
self-service access to critical applications, personalized content and the tools that allow our partners to
manage their Seagate account functions. Submit pricing requests, orders and returns through a single,
password-protected Web interface-anytime, anywhere in the world.
spp.seagate.com
spp.seagate.com supports Seagate resellers with product information, program benefits and sales tools. You
may register for customized communications that are not available on the web. These communications contain
product launch, EOL, pricing, promotions and other channel-related information. To learn more about the
benefits or to register, go to spp.seagate.com, any time, from anywhere in the world.
gate.com/support/service/index.html
Seagate Service Centers
Presales Support
Our Presales Support staff can help you determine which Seagate products are best suited for your specific
application or computer system, as well as product availability and compatibility.
Technical Support
Seagate technical support is available to assist you online at support.seagate.com or through one of our call
centers. Have your system configuration information and your “ST” model number available.
SeaTDD™ (+1-405-324-3655) is a telecommunications device for the deaf (TDD). You can send questions or
comments 24 hours daily and exchange messages with a technical support specialist during normal business
hours for the call center in your region.
SV35 Series Product Manual, Rev. C51
Page 58
Customer Service Operations
Warranty Service
Seagate offers worldwide customer support for Seagate products. Seagate distributors, OEMs and other direct
customers should contact their Seagate Customer Service Operations (CSO) representative for warrantyrelated issues. Resellers or end users of drive products should contact their place of purchase or Seagate
warranty service for assistance. Have your serial number and model or part number available.
Data Recovery Services
Seagate offers data recovery services for all formats and all brands of storage media. Our data recovery
services labs are currently located throughout the world. . Additional information, including an online request
form and data loss prevention resources, is available at http://services.sea
gate.com/index.aspx
Authorized Service Centers
Seagate Service Centers are available on a global basis for the return of defective products. Contact your
customer support representative for the location nearest you.
USA/Canada/Latin America support services
For an extensive list of telephone numbers to technical support, presales and warranty service in USA/
Canada/Latin America, including business hours, go to the "Contact Us" page on www.sea
gate.com.
Global Customer Support
Presales, Technical, and Warranty Support
Call CenterToll-freeDirect dial
USA, Canada,
and Mexico1-800-SEAGATE+1-405-324-4700
Data Recovery Services
Call CenterToll-freeDirect dialFAX
USA, Canada, 1-800-475-01435+1-905-474-21621-800-475-0158
and Mexico+1-905-474-2459
Europe, the Middle East and Africa Support Services
For an extensive list of telephone numbers to technical support, presales and warranty service in Europe, the
Middle East and Africa, go to the "Contact Us" page on www.sea
gate.com.
Asia/Pacific Support Services
For an extensive list of telephone numbers to technical support, presales and warranty service in Asia/Pacific,
go to the "Contact Us" page on www.sea
gate.com.
52SV35 Series Product Manual, Rev. C
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Index
Numerics
3D Defense System 1
A
acoustics 18
Active mode 15
agency certification (regulatory) 20
alternate capacity jumper 25
altitude 16
ambient conditions 3
ambient temperature 12, 16
areal density 11
ATA interface 29
ATA-standard commands 30
Australian C-Tick 20
autodetection 1
average seek time 12
operating power and current 13
operating shock 17
operating vibration 17
orientation 26
P
physical characteristics 12
pins 29
PIO 29
power consumption 13
power dissipation 13
power management 15
power specifications 13
power-management modes 15
Power-on to Ready 12
precautions 26
preventive maintenance 19
programmable power management 15
R
radiated RF immunity 19
radio and television interference 21
radio frequency 19
random track location 13
Read Buffer 30
Read DMA 30
Read DMA Extended 30
Read DMA without Retries 30
read errors 19
Read Log Ext 30
Read Multiple 1, 30
Read Multiple Extended 30
Read Native Max Address 30
Read Native Max Address Extended 31
Read Sectors 31
Read Sectors Extended 31
Read Sectors Without Retries 31
Read Verify Sectors 31
Read Verify Sectors Extended 31
Read Verify Sectors Without Retries 31
Read/write heads 10
Recalibrate 31
recording and interface technology 11
recording density 11
recording heads 1