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SV35.5 Series SATA Product Manual, Rev. C 9
2.5 Physical characteristics
1 TB model 500 GB model 250 GB model
Maximum height 26.1 mm (1.028 inches) 20.20 mm (0.794 inches)
Maximum width 101.85 mm (4.010 inches)
Maximum length 146.99 mm (5.787 inches)
Typical weight 677 grams (1.493 lb.) 544 grams (1.199 lb.) 380 grams (0.838 lb.)
Cache buffer 16 Mbytes (16,384 kbytes) 8 Mbytes (8,192 kbytes)
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 avera
ge of at least 5,000 measurements of seeks between
random tracks, less overhead.
1 TB and 500GB model 250 GB models
Typical seek times (msec)* Read Write Read Write
Track-to-track <0.5 <1.5 <1.0 <1.2
Average <8.5 <9.5 <8.5 <9.0
*Measured in Seek 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.
2.7 Start/stop times
1TB and 500GB models 250GB models
Power-on to Ready (sec) <10 (max) <8 (max)
Ready to spindle stop (sec) 12 (max)
Note. Start/stop measurements are taken with nominal power at 25°C ambient temperature.