8
Rev 1.3 • 25 Nov 14
NV9700
Discussion Points
If the drive is a normal disk drive, data might be corrupt and a configuration reload would be
required.
It is also possible that the disk itself has been damaged.
Reboot the system controller. When you do, you will probably find out quickly what the prob-
lem is.
• Lost one AC main or one power supply.
Losing a single power supply or AC connection is not a cause for fail-over or an alarm unless it
is the only power source for the system controller.
The newer version of the NV9700 system controller will have a red lamp that indicates that one
of the two required power supplies has failed. The older NV9700s have an internal green LED
that does the same thing, but you might not be able to see it without dismantling the NV9700.
A fail-over occurs on full loss of power for the active controller and does not occur for the inac-
tive controller.
The remedy might be as simple as plugging the AC cable back in. It is probable that the internal
power supply failed when you have AC power but the system controller still does not run.
• System controller restarted.
A restart of any system controller takes about 30 seconds. During that time, the controller is
effectively disconnected from the NV9700 and from NV9000-SE Utilities (from which you
must execute the restart).
Restarting the active controller causes a fail-over and an alarm.
Restarting the inactive controller does not cause a fail-over but does generate an alarm.
The alarm condition disappears after a successful restart (although the NV9700 buzzer might
continue to sound).
If you restart both system controllers at the same time (in NV9000-SE Utilities), system con-
troller number 1 starts first and becomes active.
• Detection of system resource degradation.
Performance degradation is gradual. It is possible for the controller to degrade to a point at
which it can no longer function. The controller signals an alarm and the system fails over.
