User manual

224
Situation 2: The error is caused by an existing drive (e.g., HDD 2) in the RAID
configuration.
If the RAID configuration is RAID 1, you can do either one of the following:
a. Back up the drive data to another storage device. Then reinstall and set up the
NAS.
b. Format the newly plugged in drive (e.g. HDD 1) as a single drive. Then back
up the data on the NAS to this drive (HDD 1) via Web File Manager. Unplug the
drive with errors (e.g., HDD 2). After that, insert a new drive to NAS to replace
the fault drive, and execute RAID 1 migration.
When the RAID configuration is RAID 5 or 6: The RAID configuration is
changed to degraded mode (read-only). It is recommended that you back up the
data and run system installation and configuration again.
Note: When plugging in or unplugging a hard drive, please strictly adhere to the
following rules to avoid abnormal system operation or data damage.
1. Plug in only one drive to NAS or unplug only one drive from NAS at one time.
2. After plugging in or unplugging a hard drive, wait for about ten seconds or longer
until you hear two beeps from the NAS. Then unplug or plug in the next hard
drive.