StarTech.com SAT3520U3R - Manual (Page 9)

Instruction Manual
6
RAID Modes
RAID Mode Description
Normal
Normal (JBOD) leaves the hard drives as independent disks. The
operating system will treat them each separately.
Different sized hard drives can be used in this mode.
RAID 0
RAID 0 (Stripe) combines both hard drives into a single large disk
array. Data is split in half evenly across each disk simultaneously.
Read/write performance is increased as a result as is disk space,
but failure of any one disk will result in permanent data loss.
Identical hard drives must be used in this mode.
RAID 1
RAID 1 (Mirror) writes the same data to both hard drives, creating
mirror copies. This provides redundancy in case one drive fails,
but only provides one drive worth of storage space.
Identical hard drives must be used in this mode.
BIG
BIG (Concatenation) combines (end-to-end) multiple hard drives
into a single large disk. When one hard drive becomes full, data
is then written to the second. The operating system will only see
a single hard drive. This provides large amounts of storage space,
but no performance or redundancy benefits.
Different sized hard drives can be used in this mode.
1. To switch RAID modes, first power on the enclosure.
2. Connect to the host computer system with a USB cable.
3. Set the selector switch to the desired mode.
4. Press the “Reset” button and wait several seconds.
5. The new mode should now be set and detected by the host
computer.
NOTE: After changing Modes, the new disk(s) will need to be
formatted.
Rebuild Mode
In RAID1 mode, if one of the drives fail, the HDD LED will not light up. Replacing the
drive, will cause the enclosure to automatically enter rebuild mode. The HDD LED will
flash to indicate that the RAID1 array is being rebuilt. Depending on the size of the
drives, this may take several hours to a full day.