USB 3.0-to-SATA II RAID Subsystem
User’s Manual
13
Concatenating (Large)
This mode is also named “Large”. In this mode, the
RAID controller will concatenate all of the hard drives
into a single hard drive with larger capacity. For
example, if three 500GB hard disks are connected to
the RAID subsystem in Large Mode, user will get a
single hard disk with capacity of 1,500GB.
If any one hard disk gets defective, information
stored in this LARGE RAID will become invalid.
Parity Protection (RAID 3 and RAID 5)
The XOR engine in the RAID controller
generates parity block. In RAID 3 mode, parity
block will be stored in the same hard disk drive.
In RAID 5 mode, parity block will be spread
over all of the different hard drives.
The RAID controller will also make use of the
same size disk space in each hard disk under
RAID 3 / RAID 5 condition.
Failure in a hard disk will cause the RAID
controller to enter into degraded mode. Host
controller still could rear/write data thru the
RAID normally without knowing any defects.
Users have to replace the defective hard disk.
The RAID controller will then enter into online-
auto-rebuild mode automatically.
