Seagate ST31500341AS ユーザーズマニュアル

Barracuda 7200.11 Serial ATA Product Manual, Rev. C

11

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.

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.

Maximum height 

1500, 1000 and 640 GB models

26.1 mm (1.028 inches)

320 and 160 GB models

20.17 mm (0.794 inches)

Maximum width

101.6 mm (4.000 +/- 0.010 inches)

Maximum length

146.99 mm (5.787 inches)

Typical weight

1500 GB models

720 grams (1.587 lbs)

1000 GB models

677 grams (1.493 lbs)

640 GB models

543 grams (1.199 lbs)

320  GB models

405 grams (0.893 lbs)

160 GB models

390 grams (0.860 lbs)

Cache buffer

ST31500341AS, ST31000333AS and ST3640323AS

32 Mbytes (32,768 kbytes)

ST3640623AS and ST3320613AS

16 Mbytes (16,384 kbytes)

ST3320813AS and ST3160813AS

  8 Mbytes (8,192 kbytes)

Track-to-track

<0.8

<1.0

Average* (1500, 1000 and 640 GB models)

<8.5

<10.0

Average** (320 and 160 GB models)

<11.0

<12.0

Average latency:

4.16