Seagate ST3500418AS ユーザーズマニュアル
12
Barracuda 7200.12 Serial ATA Product Manual, Rev. B
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
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.
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.
2.6
Start/stop times
Typical seek times (msec)
Read
Write
Track-to-track
1.0
1.2
Average
8.5
9.5
Average latency:
4.16
1000 and 750 GB models
500, 320, 250 and 160 GB models
Power-on to Ready (typ / max sec)
<10.0
<8.5
Standby to Ready (typ / max sec)
<10.0
<8.5
Ready to spindle stop (typ / max sec)
10