Precautions - NEC Express5800 Series User Manual

1.2 Precautions

Be sure to read the following notes and precautions before using WebPAM:
It is strongly recommended to provide media patrol or synchronization routinely for all
logical drives and HDDs to be connected. Whether the media patrol or the
synchronization is used may be determined as follows depending on the environment
of your system.
Synchronization
Media patrol
The above action allows you to find subsequent defects (due to degradation such as
aging) in files of low access frequency and unused areas as soon as possible. In
rebuilding after replacement of a HDD due to a failure, subsequent defects may be
found in remaining HDDs. In such a case, the system cannot be recovered. Thus,
detecting subsequent defects as early as possible is extremely effective as preventive
maintenance. Periodical synchronization or media patrol is effective to keep the stable
operation of your system. It is strongly recommended to take the action once per week
or at least once per month. For the detailed explanation and routine action, see the
description on the scheduling of the synchronization or media patrol in this manual.
Note that a media patrol task has been scheduled to be done on AM0:00 every
Wednesday by default.
To use the report monitoring by the NEC ESMPRO Manager or the express report
service, the NEC ESMPRO Agent must be installed before the installation of
WebPAM.
To use WebPAM on Internet Explorer, some default settings of Internet Explorer must
previously be changed. Change the default settings following "Appendix A Preparation
for Using WebPAM on Internet Explorer."
If there is no spare drive and free HDDs attached to the controller, please be sure to set
Auto Rebuild Status to Disable. If Enable, you will not able to see the Port ID of the
failed HDD in its event message when a logical drive goes degraded.
After the installation of WebPAM, always install the Standby/Hibernation Lock
following Appendix C at the end. This RAID system does not support the power
control feature.
To start WebPAM, more than 255 colors must be selected in the screen setup. If only
up to 255 colors are selected, the popup requesting more than 255 colors appear and
WebPAM cannot be started.
On WebPAM, the capacity is calculated and displayed based on "1GB=1000MB,
1MB=1000bytes." Therefore, the values displayed in the OS functions and in other
applications which are based on "1GB=1024MB, 1MB=1024bytes" are different from
those in WebPAM.
Environment in which your system is always subject to load.
--- Synchronization can continue at a constant rate under heavy
system load
Environment in which your system is subject to comparatively
small load in any period including the night.
--- Media Patrol has lower priority than other tasks in the system,
so it may make little progress under heavy system load
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