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When referring to drive capacity, one gigabyte, or GB, equals one billion bytes and one terabyte, or TB, equals one trillion bytes. Your
computer’s operating system may use a different standard of measurement and report a lower capacity. In addition, some of the listed
capacity is used for formatting and other functions, and thus will not be available for data storage. Actual quantities will vary based on
various factors, including file size, file format, features and application software. Actual data rates may vary depending on operating
environment and other factors. The export or re-export of hardware or software containing encryption may be regulated by the U.S.
Department of Commerce, Bureau of Industry and Security (for more information, visit www.bis.doc.gov), and controlled for import
and use outside of the U.S. Seagate reserves the right to change, without notice, product offerings or specifications.
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This manual describes the functional, mechanical and interface specifications for the following Seagate
Standard models
ST500VT000 - 1DK142
ST500VT001 - 1K6142
ST320VT000 - 1DK14C
ST250VT000 - 1DK141
These drives provide the following key features:
5400-RPM spindle speed.
16MB buffer. (ST500VT000, ST320VT000 and ST250VT000 models)
32MB buffer. (ST500VT001 model)
Quiet operation. Fluid Dynamic Bearing (FDB) motor.
High instantaneous (burst) data-transfer rates (up to 6Gb/s).
Reliability for 24x7 video applications.
Perpendicular recording technology.
State-of-the-art cache and on-the-fly error-correction algorithms.
Native Command Queuing (NCQ) with command ordering.
Full-track multiple-sector transfer capability without local processor intervention.
1000 Gs nonoperating shock and 400 Gs of operating shock.
SeaTools
The 3D Defense System™, which includes Drive Defense, Data Defense and Diagnostic Defense,
offers the industry’s most comprehensive protection for disk drives.
Support for S.M.A.R.T. drive monitoring and reporting.
Support for Read Multiple and Write Multiple commands.
Worldwide Name (WWN) capability uniquely identifies the drive.
TM
diagnostic software performs a drive self-test that eliminates unnecessary drive returns.
®
Video 2.5 HDD model drives:
1.1ABOUT THE SERIAL ATA INTERFACE
The Serial ATA interface provides several advantages over the traditional (parallel) ATA interface. The primary advantages include:
Easy installation and configuration with true plug-and-play connectivity. It is not necessary to set any jumpers or other configuration
options.
Thinner and more flexible cabling for improved enclosure airflow and ease of installation.
Scalability to higher performance levels.
In addition, Serial ATA makes the transition from parallel ATA easy by providing legacy software support. Serial ATA was designed to allow
you to install a Serial ATA host adapter and Serial ATA disk drive in your current system and expect all of your existing applications to work
as normal.
The Serial ATA interface connects each disk drive in a point-to-point configuration with the Serial ATA host adapter. There is no master/
slave relationship with Serial ATA devices like there is with parallel ATA. If two drives are attached on one Serial ATA host adapter, the host
operating system views the two devices as if they were both “masters” on two separate ports. This essentially means both drives behave
as if they are Device 0 (master) devices.
The host adapter may, optionally, emulate a master/slave environment to host software where two devices
NOTE
The Serial ATA host adapter and drive share the function of emulating parallel ATA device behavior to provide backward compatibility with
existing host systems and software. The Command and Control Block registers, PIO and DMA data transfers, resets, and interrupts are all
emulated.
The Serial ATA host adapter contains a set of registers that shadow the contents of the traditional device registers, referred to as the
Shadow Register Block. All Serial ATA devices behave like Device 0 devices. For additional information about how Serial ATA emulates
parallel ATA, refer to the Serial ATA International Organization: Serial ATA (Revision 2.6). The specification can be downloaded from
www.serialata.org.
on separate Serial ATA ports are represented to host software as a Device 0 (master) and Device 1 (slave)
accessed at the same set of host bus addresses. A host adapter that emulates a master/slave
environment manages two sets of shadow registers. This is not a typical Serial ATA environment.
SEAGATE VIDEO 2.5 HDD PRODUCT MANUAL, REV. A 2
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 drive models:
The specification summaries listed in the following tables are for quick reference. For details on specification measurement or definition,
refer to the appropriate section of this manual.
To determine the warranty for a specific drive, use a web browser to access the
following web page::http://www.seagate.com/support/warranty-and-replacements/
Warranty
From this page, click on the “Verify Your Warranty” link. You will be asked to pro-
vide the drive serial number, model number (or part number) and country of pur-
chase. The system will display the warranty information for your drive.
Load-unload cycles600,000 at 25°C, 50% rel. humidity
Supports Hotplug operation per the
Serial ATA Revision 2.6 specification
1.One GB equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and
formatting.
Yes
2.1FORMATTED CAPACITY
Model
500GB model
Formatted Capacity
500 GB976,773,168
(1)
320GB model
250GB model
1.One GB equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and
formatting.
250 GB488,397,168
Guaranteed SectorsBytes per Sector
512 (logical) / 4096 (physical)320 GB625,142,448
SEAGATE VIDEO 2.5 HDD PRODUCT MANUAL, REV. A 4
2.1.1LBA mode
When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n–1,
guaranteed sectors as defined above.
DRIVE SPECIFICATIONS
where n is the number of
Refer to Configuring and Mounting the Drive
support of drives with capacities over 137 GB.
2.2PHYSICAL ORGANIZATION
Drive modelRead/write headsNumber of disks
ST500VT000 and ST500VT001
ST250VT000
on page 15 (words 60-61 and 100-103) for additional information about 48-bit addressing
21ST320VT000
2.3RECORDING AND INTERFACE TECHNOLOGY
InterfaceSerial ATA (SATA)
Recording methodPerpendicular
Recording density 1875 Kb/in
Track density 375 ktracks/in avg
Areal density 670 Gb/in
Spindle speed 5400 RPM +/- 0.2%
2
avg
Sustained data transfer rate 100 MB/s max
I/O data-transfer rate 600 MB/s max
2.4PHYSICAL CHARACTERISTICS
Height6.8 +/- 0.2 mm (0.268 +/-.008 in)
Width69.85 +/- 0.25 mm (2.750 +/- 0.010 in)
All models
Length100.35 +0.20 / -0.25 mm (3.951 +0.008 / -0.010 in)
Typical weight<95 g (0.209 lb)
ST500VT000, ST320VT000
AND ST250VT000
ST500VT00132MB (32,384 KB)
Cache buffer
16 MB (16,192 KB)
SEAGATE VIDEO 2.5 HDD PRODUCT MANUAL, REV. A 5
DRIVE SPECIFICATIONS
2.5SEEK TIME
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 5000 measurements of seeks between random tracks, less overhead.
Table 2 Typical seek times
Typical seek times (ms)Read
Track-to-track1.5
Average12.0
Average latency5.6
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
NOTE
meet 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.
2.6START/STOP TIMES
Table 3 Start/stop times
Typical seek times (ms)Typical
Max @ 25
Power-on to ready3.04.0
Standby to ready2.53.0
2.7POWER SPECIFICATIONS
The drive receives DC power (+5V) through a native SATA power connector (refer to Figure 2).
2.7.1Power consumption
Power requirements for the drives are listed in the table in Table 4. Typical power measurements are based on an average of drives
tested, under nominal conditions, at 25°C ambient temperature. These power measurements are done with Interface Power
Management modes like HIPM and DIPM enabled.
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 disk surface and does not execute a read or
write operation. Servo electronics are active. Seek mode power is measured based on three random seek operations every 100 ms.
This mode is not typical.
Read/write power and current
Read/write power is measured with the heads on track, based on three 63 sector read or write operations every 100 ms.
°C
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.
SEAGATE VIDEO 2.5 HDD PRODUCT MANUAL, REV. A 6
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