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2.2 Formatted capacity
Model
ST4000VN000
ST3000VN000
ST2000VN000
*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.
NAS HDD Product Manual, Rev. A
Formatted
capacity*
4000GB
3000GB
2000GB
Guaranteed
sectors
7,814,037,168
5,860,533,168
3,907,029, 168
Drive Specifications
Bytes per sector
4K
13
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