Accusys ExaSAN A08S-PS User Manual
Page 34
ExaSAN A08S-PS User’s Manual
34
Q4:
In the Vista & Windows 7 Environment, after having confirmed that the
files on the installation CD have been completely installed, why does it
still show “Find no RAID card”?
Ans: Windows Vista has the built-in ability to automatically reduce the
potential of security breaches in the system. It does that by
automatically enabling a feature called User Account Control (or UAC
for short). When UAC function is enabled, the RAIDGuardX Server can
not detect the controller and thus displays the message “Find no RAID
card”. To resolve this, you have to disable UAC or run the RAIDGuardX
Server “as administrator”.
Vista:
a. Control
Panel
¨ User accounts ¨ Change security settings ¨
Deselect “Use User Account Control (UAC) to help protect your
computer”.
b.
Restart the Computer to turn off the UAC.
Windows 7:
a.
Type “MsConfig” in Start Search to start System Configuration,
then go to Tools tab, select Change UAC Settings, then click on
Launch button.
b.
Slide the slider bar to the lowest value (towards Never Notify),
with description showing Never notify me.
c.
Restart the computer to turn off the UAC.
Q5: Why doesn't performance reach the levels it should while testing the
A08S-PS? Why isn’t performance steady enough?
Ans: If performance is unsteady or not good enough, in many cases the HDD
is the cause. Since the A08S-PS is a high efficiency product, there is
extreme demand placed on each HDD. As a result, if one of the HDDs
has a small performance problem, it could still impact the entire
system’s output efficiency.
Q6:
Why is it that after my A08S-PS is more than half full, efficiency is
lowered significantly?
Ans: When capacity surpasses one half, efficiency lowers. This is caused by
the HDD itself. As a result of the HDD’s engineering, the more occupied
disk space, the lower the read/write efficiency. Since our A08S-PS is a
high-efficiency product, when all HDDs are reading/writing and reach
full capacity, causing a drop in HDD efficiency, the efficiency decline
can also carry over to our A08S-PS.