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Seagate SkyHawk Product Manual, Rev. L 12
www.seagate.com Drive Specifications
2.2 Formatted capacity
*One GB equals one billion bytes and 1TB equals one trillion 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 4.3.1, "Identify Device command" (words 60-61 and 100-103) for additional information about 48-bit addressing
support of drives with capacities over 137GB.
2.3 Default logical geometry
• Cylinders: 16,383
• Read/write heads: 16
• Sectors per track: 63
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.
2.4 Seek 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.
Model Formatted capacity* Guaranteed sectors Bytes per sector
ST8000VX0022 8000GB 15,628,053,168
4096
ST6000VX0023 6000GB 11,721,045,168
ST4000VX007 4000GB 7,814,037,168
ST3000VX010 3000GB 5,860,533,168
ST2000VX008 2000GB 3,907,029, 168
ST1000VX005 1000GB 1,953,525,168
Typical seek times (ms) Read Write
Track-to-track 1.0 1.2
Average (1TB - 4TB models) <12.0 <12.0
Average (6TB and 8TB models) 8.5 9.5
Average latency (1TB - 4TB models) 5.1
Average latency (6TB and 8TB models) 4.0
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 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.
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