Vibration And Shock - IBM 0663 Series Manual

The file's mounting frame is electrically isolated from the file's disk enclosure. The disk enclosure
is not at ground potential. Therefore any user mounting scheme must not result in the disk
enclosure being shorted to ground.
To prevent external electrical noise form interfering with the file's performance, the file's mounting
frame may be electrically isolated from the system mounting frame. If isolation is not practical
then the file's mounting frame must be within + or -150 millivolts of the file's power supply
ground. At no time should more than 35 milliamps of current be injected into the file frame. The
frequency range that has been tested with this specification is 0 to 100 MHz.
Hot plug/unplug support
If there is a need to plug or unplug the file while the power supply is active then the using system
must assure that the ground pin makes contact first. This prevents a possible CMOS latch-up
condition. During the hot "plug-in" event the 5 or 12 volt power supply voltage must not go out
of tolerance in the high voltage direction. During the not "unplug" event capacitors on the file
will prevent inductive flyback voltages from increasing to the point of damage to the file.
If the SCSI bus is connected while it has power active on any of its lines then a power or signal
glitch may occur on the bus. If any other devices are sharing the bus than this glitch may cause
them to produce an error.

VIBRATION AND SHOCK

Operating/Nonoperating Vibration
Due to the complexity of this subject we recommend that users contact the Distributor to discuss
how to perform the required measurements if they believe this to be an area which requires
evaluation.
Operating Shock
The drive continues to operate, at the stated performance, when subjected to a 5 G half sine
wave shock pulse of 11 milliseconds duration.
No permanent damage will occur to the drive when subjected to a 10 G half sine wave shock
pulse of 11 milliseconds duration.
The shock pulses are applied in either direction in each of three mutually perpendicular axes, one
axis at a time.
Non-Operating Shock
No damage will occur if the unpackaged drive is not subjected to a square wave shock greater
than a value of 35 Gs applied to all of the three axes for a period of 20 milliseconds, one direction
at a time.
WARNING: This disk drive can be damaged by Electro-Static Discharge, please follow
recommended ESD procedures before unpacking or handling the drive. Ask your Dealer for
detailed if you need assistance.