Seagate ST3250623AS ユーザーズマニュアル

Barracuda 7200.8 Serial ATA Product Manual, Rev. F

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The nonoperating shock level that the drive can experience without incurring physical damage or degradation 
in performance when subsequently put into operation is 300 Gs based on a nonrepetitive half-sine shock pulse 
of 2 msec duration.

All vibration specifications assume that the drive is mounted securely with the input vibration applied at the 
drive mounting screws. Vibration may be applied in the X, Y or Z axis.

The maximum vibration levels that the drive may experience while meeting the performance standards speci-
fied in this document are specified below.

The maximum nonoperating vibration levels that the drive may experience without incurring physical damage 
or degradation in performance when subsequently put into operation are specified below.

Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). All mea-
surements are consistent with ISO document 7779. Sound power measurements are taken under essentially 
free-field conditions over a reflecting plane. For all tests, the drive is oriented with the cover facing upward.

For seek mode tests, the drive is placed in seek mode only. The number of seeks per second is 
defined by the following equation:

 

 

(Number of seeks per second = 0.4 / (average latency + average access time)

*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which 
may increase acoustic and power to operational levels.

5–22 Hz

Limited displacement

23–350 Hz

0.5 G acceleration

5–22 Hz

Limited displacement

23–350 Hz

5.0 Gs

2.8 bels (typ)

 

3.4 bels (max)

3.7 bels (typ)

 

3.9 bels (max)