Seagate ST920814AM ユーザーズマニュアル

16

EE25 Series Product Manual, Rev. E

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 following table lists the maximum vibration levels that the drive may experience while meeting the perfor-
mance standards specified in this document.

The following table lists the maximum nonoperating vibration that the drive may experience without incurring 
physical damage or degradation in performance when subsequently put into operation.

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.

10–200 Hz

2.0 G (0 to peak)

200–500 Hz

1.0 G (0 to peak)

5–500 Hz

5.0 Gs (0 to peak). Max displacement may apply below 22 Hz.

2.3 bels (typ)

 

2.5 bels (max)

2.5 bels (typ)

 

2.7 bels (max)

2.8 bels (typ)

 

3.0 bels (max)