Proface APL3000B - Node Box PC - Manual (Page 45)

PL3000 Series Hardware Manual
3-4
• Using the Hard Disk in an environment that is excessively hot and/or humid will
shorten the disk’s usage lifetime. A wet bulb temperature of 29°C or less is
recommended. This is equivalent to the following data.
• In order to extend the lifetime of the hard disk, Pro-face recommends you set
Windows
®
to turn the hard disk off when the unit is not being operated. A setting
of 5 minutes is recommended. In Windows
®
2000, click [Start]-[Control Panel]-
[Power Options]-[Turn off hard disks]. In Windows
®
XP, click [Start]- [Control
Panel]-[Power Options]-[Turn off hard disks].
• Do not vibrate the hard disk continuously at the same frequency. Doing so may
cause the hard disk to reduce transfer speeds or stop temporarily.
• The SSD unit has a limited number of writes. Exceeding the guaranteed number
of writes could make it impossible to read and write data, or systems may
become unstable resulting in malfunctions.
• You can calculate the expected lifetime of the SSD unit based on the number of
writes.
SSD memory capacity
*1
: 15,631 MB
Guaranteed number of writes: 1 hundred thousand
The expected lifetime when writing 512 MB of data once per minute is approximately 6
years.
Depending on the system and software, data writes may actually be run several times
even when only one write command is made. This can lead to actual lifetimes
significantly different from expected lifetimes.
In order to make more accurate lifetime predictions, please use Pro-face's System
Monitor, which is included with the PL unit.
*1 The SSD unit incorporates the Static Wear Leveling function.
When calculating the expected lifetime, do not omit areas used by OS.
Temperature at 35°C at 40°C
Humidity no higher than 64% RH no higher than 44% RH