Hitachi Compute Blade 2500 Getting Started Manual page 14

A hard disk is a precision instrument. Carefully handle hard disks when
you use them. Inappropriate handling can result in hard disk failure.
Failed disks
If you attempt to replace failed disks by using an incorrect procedure or
faulty alternative disk, data on the disk might be corrupted. Before
replacing faulty disks, back up the data.
Aluminum electrolytic capacitors
An aluminum electrolytic capacitor has a limited service life. Do not use
an aluminum electrolytic capacitor past its service life. If you do so,
leakage or depletion of the electrolytes might cause smoke or electric
shock. To avoid such hazardous situations, replace limited-life parts once
they are past their designated service life.
Distribution board
Install a distribution board close to an entrance to protect the devices in
your computer system and to serve as an emergency power breaker.
Signal cables
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Before turning off the power
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Notes on rack mount safety
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xiv
Route cables so that nobody will trip over them. Tripping over cables
can cause injury or failure of devices connected to the equipment. In
addition, valuable data might be lost.
Do not place heavy items on the cables. Do not route cables close to
devices that become hot. If you do so, the cable covering might be
damaged, which can cause failures in connected devices.
Follow the prescribed procedure for power operation. If you turn on or
off the power without following the prescribed procedure, a system
unit failure might occur.
Before turning off the power, make sure that all devices connected to
the equipment have stopped. Turning off the power during operation
of the equipment might cause an equipment failure or data loss.
If you are using an OS that requires a shutdown procedure, always
finish the shutdown procedure, and then turn off the power. If you
turn off the power before the shutdown is complete, data might be
lost.
Elevated ambient temperature
If you install the system unit in a closed or multi-unit rack
assembly, the operating ambient temperature of the rack
Hitachi Compute Blade 2500 Series Getting Started Guide
Preface