Maxtor STM3160215AS User Manual

Page of 56
DiamondMax 21 Serial ATA Product Manual, Rev. C
19
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 average of at least 5,000 measurements of seeks between 
random tracks, less overhead.  
*Measured in performance mode.
**Measured in quiet 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
2.8
Power specifications
The drive receives DC power (+5V or +12V) through a native SATA power connector. See Figure 4 on page 30.
500-320 GB  
STM3250820AS*
STM3250824AS
STM3250310AS**
160 - 80 GB 
STM340215AS**
Typical seek times (msec)
Read 
Write 
Read 
Write 
Read 
Write 
Read 
Write 
Track-to-track
<0.8
<1.0
<0.8
<1.0
<1.0
<1.2
<1.0
<1.2
Average
<8.5
<10.0
<8.0
<9.0
<11.0
<12.0
<11.0
<12.0
Average latency:
4.16
500-320 GB 
STM3250824AS
STM3250820AS
 
STM3250310AS
160 - 40 GB
Power-on to Ready (sec)
15 (max)
11 (max)
11 (max)
7.9 (max)
Standby to Ready (sec)
15 (max)
11 (max)
15 (max)
7.9 (max)
Ready to spindle stop (sec)
10 (max)
12 (max)
10 (max)
10 (max)