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About the Blackbox PRO RAID and RAID Modes
Blackbox PRO RAID enclosure contains two hard disk drives, which function as one single
volume. It supports four drive modes: RAID 1 (mirroring), RAID 0 (striping), and CLEAR (JBOD –
just a bunch of disks), and BIG (spanning). Each drive mode has its own advantages, depending
upon the application.
RAID 0 is the default shipping RAID mode. In RAID 0 (striping) mode, the two drives are seen by
the computer as one large drive, and reading and writing occurs on both drives simultaneously.
RAID 0 is designed to increase the performance and data throughput of the drive system. The
Blackbox PRO RAID’s built-in RAID controller splits each piece of data across both of the drives
in segments and distributes the I/O burden. Since data is written without any form of parity data
checking, it allows for the fastest data transfer of all other RAID modes. However, if one drive
becomes damaged, the data on both drives can become corrupted. RAID 0 is not redundant or
fault tolerant like RAID 1, but the trade-off is that it’s the fastest of all RAID levels.
RAID 1 (mirroring) offers data redundancy and real-time backup by writing the same data to the
two hard drives at the same time. Should a drive failure happen, data is still available on the
remaining drive. In RAID 1 mode, the two drives are seen by the computer as one volume but
with half the capacity. For example, a 8TB Blackbox PRO RAID will be seen as a single 4TB drive.
Reading and writing occurs on both drives simultaneously so that each of the drives contains
exactly the same data, mirroring each other.
In CLEAR (JBOD - just a bunch of disks), both hard drives are used independently. You may
choose which hard drive you would like to save data on since each drive will mount individually
to your computer.
BIG (SPANNING) combines multiple hard drives into a single logical unit. Unlike Striping,
Spanning writes data to the first physical drive until it reaches full capacity. When the first disk
reaches full capacity, data is written to the second physical disk.
MAKE SURE TO BACKUP YOUR DATA OFTEN!
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