360 Systems 2470SD Time Delay - Manual (Page 39)

Maintenance 39
• Initializing, indicated by "Initializing" on the Array Unit 0 status line;
• Degraded, indicated by "Degraded" on the Array Unit 0 status line;
• Rebuilding, indicated by "Rebuilding x%" on the Array Unit 0 status line.
“Rebuilding” is the process by which the array controller 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 initialization process as a background task. This
task should not interfere with Image Server’s ability to record or play clips.
Parity errors may occur if the Image Server loses power, or is improperly shut off. No data will be
lost, but the parity reinitialization process may take several hours. NEVER use the rear panel power
supply switch to shutdown the Image Server. Shut down the system only by momentarily pressing the
front panel power 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 power switch
in for 4 seconds.
A degraded array with a drive listed as “Not In Service” or “Inaccessible” is usually indicative of a
permanent drive error, typically a single disk or cable failure, but redundant data will 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. A hard disk
array must be repaired using exactly the same drive model and 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 Image Server.