Seagate ST250DM000 Barracuda 7200.11 SATA Product Manual - Page 17
Physical characteristics, Seek time, Start/stop times - benchmark
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2.4 Physical characteristics Maximum height (1000-500 GB models) Maximum width Maximum length Typical weight 1000 GB models 750 & 640 GB models 500 GB models Cache buffer ST31000340AS, ST3750330AS, ST3640330AS and ST3500320AS ST31000640AS, ST3750630AS, ST3640630AS and ST3500620AS ST3500820AS 26.1 mm (1.028 inches) 101.6 mm (4.000 +/- 0.010 inches) 146.99 mm (5.787 inches) 677 grams (1.493 lbs) 633 grams (1.396 lbs) 543 grams (1.199 lbs) 32 Mbytes (32,768 kbytes) 16 Mbytes (16,384 kbytes) 8 Mbytes (8,192 kbytes) 2.5 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. Typical seek times (msec) Track-to-track (1000, 750 & 640 GB models) Track-to-track (500 GB models) Average Average latency: Read