Vantec NST-400MX-53 User Manual page 15

RAID 1 Mode (Mirror):
This mode allows the device automatically to
copy data to both hard drives. It stores all data in
duplicate on separate drives to protect against
data loss due to drive failure. It provides the
highest level of data protection for critical data
that you cannot afford to lose if a hard drive fails.
The capacity is equal to the smaller of the two
hard drives. Switching to this mode will prompt
to initialize and format the hard disks. This will
not work to create a mirror set from existing hard
( figure 6-E)
drives.
NOTE:
All data previously stored on the hard drive will
be lost! Please back up all data to a separate
storage before continuing.
NOTE:
If one drive fails, the SAFE volume is still usable, but it is in a vulnerable state because its mirrored hard
drive is inaccessible. When the offline drive comes back online, the appliance begins a rebuild process
immediately to restore data redundancy. Although the volume remains available during the rebuild
process, the volume is susceptible to data loss through damage to the remaining drive until redundancy
is restored at the end of the rebuild and verification process. Host access takes precedence over the
rebuild process. If you continue to use the SAFE volume during the rebuild, the rebuild process will take
a longer time to complete, and the host data transfer performance will also be affected.
RAID 1 Mode
( figure 6-E)
Mode Configuration
13
NST-400MX-S3R