Manual Seagate Barracuda 7200.7 Serial ATA (page 21 of 54) (English)

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Barracuda 7200.7 Serial ATA Product Manual, Rev. N 13

2.9.6 Vibration

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.

2.9.6.1 Operating vibration

The maximum vibration levels that the drive may experience while meeting the performance standards speci-

fied in this document are specified below.

2.9.6.2 Nonoperating vibration

The maximum nonoperating vibration levels that the drive may experience without incurring physical damage or degrada-

tion in performance when subsequently put into operation are specified below.

2.10 Acoustics

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.

Note. 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)

Note. During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specifica-

tion, 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

Table 6: Fluid Dynamic Bearing (FDB) motor acoustics

Models Idle* Performance seek

ST3200822AS

ST3160827AS

ST3160023AS

ST3160021AS

ST3120827AS

ST3120026AS

ST3120022AS

ST380817AS

ST380013AS

ST380011AS

<2.5 bels (typ)

2.7 bels (max)

3.4 bels (typ)

3.7 bels (max)

ST340111AS

ST340014AS

<2.2 bels (typ)

2.4 bels (max)

3.1 bels (typ)

3.5 bels (max)

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Seagate Barracuda 7200.7 Serial ATA Manual

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