1
Instructions for Using
the Hard Disk
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Every hard disk has an estimated life span.
Continuous operation of the hard disk for 24
hours or repeated access to the hard disk in a
short period of time may result in a higher
incidence of problems or unstable operation.
To ensure stable operation for a longer
period, observe the instructions described in
this document.
Since the hard disk is comprised of precision
mechanical parts, it is the most fragile
component in this product. Use extreme
caution regarding the handling method and
operating environment.
Life Span
The hard disk is comprised internally of
precision mechanical parts and uses weak
electrical signals to record data.
Since the expected life span of the hard disk
varies considerably depending on the
handling method (impact and static
electricity) and operating conditions
(temperature, humidity, vibration and
operation time), it is regarded as a
consumable component.
The incidence of problems may increase
depending on the operating conditions, even
within the maintenance period. To maintain
the stability of the hard disk for a longer
period, refer to the following basic
specifications.
The hard disk life span is estimated to be
whichever is reached first of the following
three periods. (The expected life span may be
shorter than the following periods depending
on the operating conditions.)
(1) 5 years
(2) Power-On Hours:
20,000 or 30,000 hours, depending on
the hard disk. Please refer to the hard
disk's installation guide for details.
(3) Head loading/unloading frequency:
600,000 times (Number of reciprocating
motions)
• Loading
This operation moves the head from the
return position onto the disk.
• Unloading
This operation returns the head from
the disk to the return position. If the
hard disk is not accessed for 15 sec-
onds, the head will automatically return
to the return position to protect the
disk.
[Reference example]
When the hard disk power-ON duration
is 11 hours/day and the disk is accessed
