Hitachi Compute Rack 220H Replacement Manual page 17

Radio interference
When you install the equipment next to another electronic device, the radio
waves may interfere with each other. In particular, a television set or a radio
in the vicinity may make a noise.
Magnetism generator
Do not place a device that generates strong magnetism, such as a magnet or
a speaker, near the equipment. Doing so can cause a system unit failure.
Handling HDD/SSD
An HDD/SSD is a precision instrument. Handle it carefully when you use it.
Inappropriate handling could result in HDD/SSD failure.
Failed HDD/SSD
•
If you attempt to replace failed HDD/SSD using an incorrect procedure or
failed alternative disk, data on the disk array can be corrupted. Back up
the data before replacing the drive.
•
If you attempt to replace normal HDD/SSD, data on the disk array can be
corrupted. Only replace the failed HDD/SSD.
•
Replace the failed HDD/SSD with turning on the system unit. Otherwise,
data on the disk array can be corrupted.
Static electricity
Discharge static electricity by touching metal door knob or wear cotton gloves
whenever you handle a component. Otherwise, the device might fail.
Residual electric charge
When you change the configuration of the system unit (DIMM, fan, PCI card,
or peripherals), disconnect all the power plugs and wait 30 seconds and more
before the procedure. Otherwise, residual electric charge might cause
malfunction.
Hitachi Compute Rack 220H CRU Replacement Guide
Safety guidelines xvii