Seagate Desktop SSHD Product Manual, Rev. K
14
www.seagate.com
Drive Specifications
2.9.5 Shock
All shock specifications assume that the drive is mounted securely with the input shock applied at the drive mounting
screws. Shock may be applied in the X, Y or Z axis.
2.9.5.1
Operating shock
These drives comply with the performance levels specified in this document when subjected to a maximum operating
shock of 80 Gs based on half-sine shock pulses of 2ms during read operations. Shocks should not be repeated more than
two times per second.
2.9.5.2
Nonoperating shock
2TB and 4TB models
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 non-repetitive half-sine shock pulse of
2 ms in duration.
1TB model
The nonoperating shock level that the drive can experience without incurring physical damage or degradation in
performance when subsequently put into operation is 350 Gs based on a non-repetitive half-sine shock pulse of
2 ms in duration.
2.9.6 Vibration
2.9.6.1
Operating vibration
The maximum vibration levels that the drive may experience while meeting the performance standards specified in this
document are specified below.
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. Throughput may vary if improperly mounted.
2.9.6.2
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.
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.
*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
.
2Hz to 22Hz
0.25 Gs (Limited displacement)
22Hz to 350Hz
0.50 Gs
350Hz to 500Hz
0.25 Gs
5Hz to 22Hz
3.0 Gs (Limited displacement)
22Hz to 350Hz
3.0 Gs
350Hz to 500Hz
3.0 Gs
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 l average access time
Table 4
Fluid Dynamic Bearing (FDB) motor acoustics
4-Disk - (4TB)
2 Disks - (2TB)
1 Disk - (1TB)
Idle*
2.3 bels (typical)
2.5 bels (max)
2.4 bels (typical)
2.6 bels (max)
2.2 bels (typical)
2.4 bels (max)
Seek
2.8 bels (typical)
3.0 bels (max)
2.6 bels (typical)
2.7 bels (max)
2.4 bels (typical)
2.5 bels (max)
