User Manual

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Constellation.2 Serial ATA Product Manual, Rev. G 11

*One GB 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.

2.2 Formatted capacity

*One GB equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and

formatting.

2.2.1 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.

See Section 6.3.1, "Identify Device command" (words 60-61 and 100-103) for additional information about 48-bit

addressing support of drives with capacities over 137 GB.

2.3 Default logical geometry

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.

Drive acoustics, sound power (bels)

Active 2.8 (typical)

Idle** 2.2 (typical)

Nonrecoverable read errors 1 sector per 10

bits read

Annualized Failure Rate (AFR) 0.62%

Warranty To determine the warranty for a specific drive, use a web browser to access the

following web page:

http://www.seagate.com/www/en-us/support/warranty_&_returns_assistance

From this page, click on the “Is my Drive under 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.

Load/Unload cycles 300,000 (25°C, 50% rel. humidity) (600,000 design life testing)

Supports Hotplug operation per

Serial ATA Revision 2.6 specification

Yes

Model Formatted capacity* Guaranteed sectors Bytes per sector

ST91000640NS

ST91000641NS

ST91000642NS

1000 GB 1,953,525,168

512

ST9500620NS

ST9500621NS

ST9500622NS

500 GB 976,773,168

ST9250610NS

ST9250611NS

ST9250612NS

250 GB 488,397,168

Cylinders Read/write heads Sectors per track

16,383 16 63

Drive specification ST91000640NS