15812. Troubleshooting12.1 Replace a Failed Disk DriveIf a disk drive fails, the Disk Status LED becomes orange. If the disk drivebelongs to a RAID Volume, the Volume goes Critical or Offline, depending onRAID level. See Check RAID Volume Status for details.Replace the failed disk drive with a new disk drive of the same or slightlygreater capacity. You do not have to power down the unit. Refer to ModifyRAID Volume to remove the failed disk and replace it with a new one.12.2 Respond to a Critical RAID VolumeHow the unit responding to a Critical RAID Volume depends on the RAID levelof your Volume: For RAID 1, 5, and 10 volumes, you must replace the failed disk drivewith a new one. The RAID Volume will begin rebuilding itself when youinstall the new disk drive. See Replace a Failed Disk Drive for details. RAID 0 volumes go offline after a disk drive failure. A RAID 0 Volumecannot be recovery. All data of the volume is lost.12.3 Respond to a File System Error RAID VolumeWhen encountering file system error, you are unable to keep the dataanymore. It’s likely due to abnormal usage and disk damage. In this case, ifyou want to keep recording, we suggest replacing new disks, or try thefollowing methods.1. Format this volume, and check if the status becomes functional. If yes,you can start recording. If it doesn’t, try the second method.2. Delete this volume, and create volume again to see if the status isfunctional.12.4 Restore the Default Administrator’s PasswordIf you forget the password, and want to reset the Administrator’s password tothe default password: admin, follow the following steps.1. Verify that the system is fully booted.2. Insert your reset tool into the reset button hole on the back of the device.
