360 Systems 1200HD-EX - Manual (Page 104)

MAXX-1200 Owner’s Manual Page 103
IMPORTANT
The term “DEGRADED” refers to the state of the Array data, not necessarily the
hardware or disk drives themselves. It indicates that the parity information that
protects the data is not up to date. While it can be caused by hardware problems, it
can also be the result of something as simple as power loss without a proper
Shutdown operation.
“Verifying” is the process by which the array controller checks for and corrects data parity
errors that may have occurred because of power loss, incorrect shutdown or some other data
error. Upon detection of a parity error, the controller will automatically start the Verify process
as a background task. This task should not interfere with server’s ability to record or play clips.
Parity errors may occur if the server loses power, or is improperly shut off. No data will be
lost, but the parity re-initialization process may take several hours. NEVER use the rear panel
power supply switch to shutdown the server. Shut down the system only by momentarily
pressing the front panel RESET button or selecting Start > Shutdown > Shutdown from the
graphic user interface.
Note that in some cases the power may not automatically shut off after a Shutdown is executed.
When the front panel LED indicators start flashing in response to the Shutdown command, the
file system has been successfully closed and it is safe to force the power off by holding the
RESET button in for four seconds.
A Degraded array with a drive listed as “Not In Use”, “Not Present” or “Inaccessible” is usually
indicative of a permanent drive error; redundant data will still allow normal operations to
continue. You may first try to rebuild the array with the existing drive still installed. If the array
continues to indicate a failed drive, replace the drive and then rebuild the array. The
replacement must be a drive from the same model series and the same or greater capacity as
other drives in the array. Because specific drive models become unavailable as time goes on,
360 Systems recommends that maintenance spares be purchased at the same time as the server.