HP Pavilion xe700 HP Pavilion PCs - (English) Seagate Hard Drive U Series 10 M - Page 15

U10 Family Product Manual, Rev. A 7 1.5 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 5,000 measurements of seeks between random tracks, less overhead. • Full-stroke seek time is one-half the time needed to seek from the first data cylinder to the maximum data cylinder and back to the first data cylinder. The full-stroke typical value is determined by averaging 100 full-stroke seeks in both directions. Typical seek times (msec) Read Write Track-to-track 1.5 2.1 Average 10.5 11.5 Full-stroke 23.0 25.0 Average latency: 5.56 msec - - 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 or exceed 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. 1.6 Start/stop times Power-on to Ready (sec) Standby to Ready (sec) Ready to spindle stop (sec) 10 (typical) 10 (typical) 10 (typical) 1.7 Power specifications The drive receives DC power (+5V or +12V) through a four-pin standard drive power connector.