Asus PCI-DA2200 User Manual page 57

NOTE:
A "Logical Drive" is a set of drives grouped together to operate under a
given RAID level and appears as a single contiguous drive. The ASUS PCI-
DA2200 controller is capable of grouping connected drives to as many as 8
logical drives, each configured on the same or different RAID levels. A
logical drive can be further divided into a maximum of 8 "Partitions".
During operation, the host sees an unpartitioned logical drive or a partition
of a partitioned logical drive as one single physical drive.
6-3
ASUS PCI-DA2200 User's Manual