Seagate ST33000651SS Constellation ES SATA Product Manual - Page 25

3.9.5 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. 3.9.5.1 Operating vibration The maximum vibration levels that the drive may experience while meeting the performance standards specified in this document are specified below. 5-22 Hz 22-350 Hz 350-500 Hz 20 - 1500Hz *(RROV) 0.25 Gs 0.50 Gs 0.25 Gs 12.5 rads/s2 w/RVFF * Rotary Random Operating Vibration 3.9.5.2 Nonoperating vibration 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. 10-500 Hz 4.9 Grms ref Linear Random 3.10 Acoustics Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). All measurements 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) Table 5: Fluid Dynamic Bearing (FDB) motor acoustics ST32000644NS ST31000524NS ST3500514NS Idle* 2.7 bels (typ) 2.9 bels (max) 2.2 bels (typ) 2.5 bels (max) 1.9 bels (typ) 2.3 bels (max) Performance seek 3.0 bels (typ) 3.3 bels (max) 2.8 bels (typ) 3.1 bels (max) 2.7 bels (typ) 3.0 bels (max) *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. Constellation ES Serial ATA Product Manual, Rev. G 19