Seagate ST9160511NS, ST9500530NS manual Physical characteristics, Seek time, Start/stop times

3.5Physical characteristics

Weight: (maximum)

ST9500530NS

ST9160511NS

Cache buffer

196 grams (0.43 lbs)

188 grams (0.41 lbs)

32 Mbytes (32,768 kbytes)

Note. Refer to Figure 5, page 23 for detailed mounting configuration dimensions.

3.6Seek 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.

*Typical seek times (msec)	Read	Write
Track-to-track	0.5	0.7
Average	8.0	8.4
Full Stroke	17.4	17.9
Average latency:	4.16

*Measured in performance mode.

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.

3.7Start/stop times

	ST9500530NS	ST9160511NS
Power-on to Ready (sec)	20 (max)
Standby to Ready (sec)	6 (max)	4 (max)
Ready to spindle stop (sec)	20 (max)

Constellation Serial ATA Product Manual, Rev. D 9