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Chapter 11 RAID Abnormal Operation
Troubleshooting
If the RAID configuration of your NAS is found abnormal or there are error messages,
please try the following solutions:
Note: You must back up the important data on the NAS first to avoid any potential
data loss.
1. Check that the RAID rebuilding has failed:
a. LED: The Status LED of NAS flashes in red.
b. On the “Disk Management” > “Volume Management” page, the status of the
disk volume configuration is “In degraded mode”.
2. Find out the hard drive(s) that causes the RAID rebuilding failure.
You can go to “System Administration” > “System Logs” page to search for the
following error message and find out which hard drive(s) causes the error.
Error occurred while accessing Drive X.
Drive X has been removed.
X refers to the number of the hard drive slot.
3. Troubleshooting
After plugging in the new hard drive (e.g., HDD 1), drive rebuilding will start. If the
drive configuration fails again due to read/write error of the hard drive in the
rebuilding process, identify which hard drive causes the error and follow the steps
below to solve the problems.
Situation 1: The error is caused by the newly plugged in drive.
If the newly inserted drive (e.g., HDD 1) causes the rebuilding error, please unplug
HDD 1 and plug in another new drive to start RAID rebuilding.
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