Seagate Pipeline HD Pipeline HD Series SATA Product Manual - Page 14

Drive Specifications www.seagate.com 2.5 Physical characteristics Maximum height 2TB and 1.5TB models 1TB model Maximum width Maximum length Typical weight 2TB and 1.5TB models 1TB model Cache buffer 26.1mm / 1.028 in 20.20mm / 0.795 in 101.6mm / 4.0 in (± 0.010 in) 147.00mm / 5.78 in 635g / 1.39 lb 415g / 0.915 lb 64MB (65,536kb) 2.6 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. Typical seek times (ms) Track-to-track Average Average latency 2TB and 1.5TB Read Write 1.0 1.2 12.0 13.0 5.1 5.1 1TB Read Write 1.0 1.2 8.5 9.0 5.1 5.1 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. 2.7 Start/stop times Start/stop times @ 25°C Power-on to ready (max) Standby to ready (max) Ready to spindle stop (max) 2TB and 1.5TB models