Seagate 1680, 2250 manual Operating shock, Nonoperating shock, Vibration, Operating vibration

Marathon 2250 and Marathon 1680 Product Manual 13

Note. At power-down, the read/write heads automatically move to the shipping zone. The head and slider assembly park inside of the maximum data cylinder. When power is applied, the heads re- calibrate to Track 0.

1.8.5.1Operating shock

The Marathon 2250 and the Marathon 1680 incorporate SafeRite shock protection and can withstand a maximum operating shock of 125 Gs without nonrecoverable data errors (based on half-sine shock pulses of 2 msec).

1.8.5.2Nonoperating shock

The nonoperating shock level that the Marathon 2250 and Marathon 1680 can tolerate without incurring physical damage or degradation in performance is 350 Gs (based on half-sine shock pulses of 2 msec duration) or 150 Gs (based on half-sine shock pulses of 11 msec duration). Shock pulses are defined by MIL-STD-202 F with the ampli- tude tolerance controlled to ± 5%.

1.8.6Vibration

For vibration specifications, it is assumed that the drive is mounted in an approved orientation with the input levels at the drive mounting screws. For the nonoperating specifications, it is assumed that the read/write heads are positioned in the shipping zone.

1.8.6.1Operating vibration

The following table lists the maximum vibration levels that the drive may experience without incurring physical damage, data loss or performance degradation.

5–22 Hz	0.02-inch displacement (peak-to-peak)
22–400 Hz	0.75 Gs acceleration (0 to peak)
400–22 Hz	0.75 Gs acceleration (0 to peak)
22–5 Hz	0.02-inch displacement (peak-to-peak)