Seagate ST2000NM0023 Constellation ES (.1) SATA Product Manual - Page 27
Nonoperating vibration, Note., Table 5, Fluid Dynamic Bearing FDB motor acoustics
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2.9.5.2 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 2.10 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 2TB models 1TB models 500GB models 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. D 21