Maxtor STM3160813AS manual Physical characteristics, Seek time, Typical seek times msec Read Write

2.4Physical characteristics

Maximum height (1000 GB models)	26.1 mm (1.028 inches)
Maximum height (320-160 GB models)	20.17 mm (0.794 inches)
Maximum width	101.6 mm (4.000 +/- 0.010 inches)
Maximum length	146.99 mm (5.787 inches)
Typical weight
1000 GB models	630 grams (1.389 lbs)
320 GB models	405 grams (0.893 lbs)
160 GB models	390 grams (0.860 lbs)
Cache buffer
STM31000334AS	32	Mbytes (32,768 kbytes)
STM3320614AS	16	Mbytes (16,384 kbytes)
STM3160813AS	8	Mbytes (8,192 kbytes)

2.5Seek 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 (1000, 320 and 160 GB models)	<0.8	<1.0
Average (1000 GB model)	<8.5	<10.0
Average (320 and 160 GB models)	<11.0	<12.0
Average latency:	4.16

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.

DiamondMax 22 Serial ATA Product Manual, Rev. A 9