Seagate Barracuda ES.2 Serial ATA 250GB ST3250310NS User Manual
Product codes
ST3250310NS
Barracuda ES.2 Serial ATA Product Manual, Rev. E
9
2.5
Physical characteristics
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:
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.
*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.
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
Maximum height
26.1 mm (1.028 inches)
Maximum width
101.6 mm (4.000 +/- 0.010 inches)
Maximum length
146.99 mm (5.787 inches)
Max weight
ST31000340NS
677 grams (1.493 lbs)
ST3750330NS
633 grams (1.396 lbs)
ST3500320NS
543 grams (1.199 lbs)
ST3250310NS
518 grams (1.141 lbs)
Cache buffer
32 Mbytes (32,768 kbytes)
*Typical seek times (msec)
Read
Write
Track-to-track
0.8
1.0
Average
8.5
9.5
Average latency:
4.16
ST31000340NS
ST3750330NS
ST3500320NS, ST3250310NS
Power-on to Ready (sec)
20 (max)
Standby to Ready (sec)
10 (max)
9 (max)
8 (max)
Ready to spindle stop (sec)
20 (max)