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2.4
Physical characteristics
Maximum height (1000 and 750 GB models)
Maximum height (500, 320, 250 and 160 GB models)
Maximum width
Maximum length
Typical weight
1000 and 750 GB models
500, 320, 250 and 160 GB models
Cache buffer
1000 - 750 GB models
500 and 320 GB models
250 and 160 GB models
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
Average
Average latency:
These drives are designed to consistently meet the seek times represented in this manual. Physical
Note.
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.
2.6
Start/stop times
Power-on to Ready (typ / max sec)
Standby to Ready (typ / max sec)
Ready to spindle stop (typ / max sec)
DiamondMax 23 Serial ATA Product Manual, Rev. C
26.1 mm (1.028 inches)
19.98 mm (0.787 inches)
101.6 mm (4.000 +/- 0.010 inches)
146.99 mm (5.787 inches)
622 grams (1.371 lbs)
415 grams (0.915 lbs)
32 Mbytes (32,768 kbytes)
16 Mbytes (16,384 kbytes)
8 Mbytes (16,384 kbytes)
Read
Write
<1.0
<1.2
<8.5
<9.5
4.16
1000 and 750 GB models
<10.0
<10.0
500, 320, 250 and 160 GB models
<8.5
<8.5
10
11
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