Seagate STM303004N1AAAS-RK DiamondMax 21 SATA Product Manual - Page 22

2.2 Formatted capacity Model STM3500630AS STM3320620AS STM3320820AS STM3250824AS STM3250820AS STM3250310AS STM3160815AS STM3160215AS STM380815AS STM380215AS STM340215AS Formatted capacity* 500 Gbytes 320 Gbytes 320 Gbytes 250 Gbytes 250 Gbytes 250 Gbytes 160 Gbytes 160 Gbytes 80 Gbytes 80 Gbytes 40 Gbytes Guaranteed sectors 976,773,168 625,142,448 625,142,448 488,397,168 488,397,168 488,397,168 312,581,808 312,581,808 156,301,488 156,301,488 78,165,360 Bytes per sector 512 512 512 512 512 512 512 512 512 512 512 *One Gbyte 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 4.3.1, "Identify Device command" (words 60-61 and 100-103) for additional information about 48bit addressing support of drives with capacities over 137 Gbytes. 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. 16 DiamondMax 21 Serial ATA Product Manual, Rev. C