Seagate ST9750420AS Momentus 7200.2 SATA Product Manual - Page 11

Table 1: Drive specifications Drive specification Load/Unload (L/UL) cycles 25°C, 50% relative humidity 32°C, 80% relative humidity 5°C, 80% relative humidity 5°C, 20% relative humidity 60°C, 20% relative humidity Supports Hotplug operation per SATA II specification ST9200420ASG ST9160823AS ST980813AS ST9200420AS ST9160823ASG ST9120823AS ST9100821AS ST980813ASG 600,000 software-controlled power on/off cycles 20,000 hard power on/off cycles 600,000 software-controlled power on/off cycles 20,000 hard power on/off cycles Yes *One Gbyte 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. ***Typical notebooks will pull power to the drive when entering S3 and S4; while in the S3 and S4 states, drive sleep and drive standby modes will not contribute to battery power consumption. 2.2 Formatted capacity Model ST9200420AS and ST9200420ASG ST9160823AS and ST9160823ASG ST9120823AS ST9100821AS ST980813AS and ST980813ASG Formatted capacity* 200 Gbytes 160 Gbytes 120 Gbytes 100 Gbytes 80 Gbytes Guaranteed sectors 390,721,968 312,581,808 234,441,648 195,371,568 156,301,488 Bytes per sector 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. Momentus 7200.2 SATA Product Manual, Rev. E 5