SHARKOON 5-Bay RAID-Station - Manual (Page 31)

5-bay raid station 31
11.3 CLONE mode
Function:
The CLONE mode duplicates all data on separate drives to protect against data loss due
to drive failure. One drive clones the others at all times. Every write operation goes to all
drives.
Advantage:
CLONE mode provides the highest level of data protection for critical data. The resulting
storage capacity of the virtual CLONE volume will be equivalent to the size of one hard
drive (if all drives are the same) or the smallest of the drives (if they are different).
If a drive fails (maximum four drives), the CLONE volume is still usable. When the offline
drive comes back online, the appliance begins a rebuild process immediately one by one
(in case more than one HDD failed) to restore the data. During this procedure the LED
indications will notify you that a rebuild is in progress.
Notes:
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 CLONE volume during the rebuild, the
rebuild process will take a longer time to complete, and the host data transfer performance
will also be affected.
It is also possible to create a CLONE volume using one hard disk drive connected to Port 1
of the 5-BAy RAID STATION, although no clone will occur until a second hard disk drive
is connected. With only one hard disk drive connected, the CLONE volume will be available,
although no data protection will be provided until a second hard disk drive is connected.
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