ST1 Series Product Manual, Rev. A
13
2.10.5
Shock
All shock measurements in this section are carried out at drive level. For all linear shock test, Operating or
Non-Operating, the input shock level shall be measured at the frame of the disk drive at the specific location
indicated by the red ellipse in Figure 4 below for the CF and interface drives.
Figure 4. Location where tri-axial accelerometer will be placed on S1 drive.
All shock test will cover all the 6 directions, +/- x, y and z axes. The drive axis definition in shown in Figure 5
below.
Figure 5. Drive axis definition for S1 drives.
2.10.5.1
Operating shock
The drive will be subjected to 10 shocks for each direction. During the shocks, there must be a minimum delay
of 3 seconds between shock pulses. Soft errors and automatic retries are allowed during the test. No data loss
or permanent damage occurs during a half sine shock pulse of:
200Gs, 1ms (on-track read at OD)
200Gs, 2ms (on-track read at OD)
175Gs, 1ms (random write)
175Gs, 2ms (random write)
2.10.5.2
Nonoperating shock
The Non-Operating Shock level that the drive can experience without incurring any physical damage when
subsequently put into operation is 750Gs based on a non-repetitive half sine shock pulse of 2ms duration. The
same applies for shock levels of 1500Gs, 1ms pulse duration and 1500Gs, 0.5ms pulse duration on fresh
drives for each level.
S1 interface drive
S1 CF drive
Finger
Grip Area
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