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DAS-208SA Disk Array User Guide
4.2 Creating RAID Sets and Setup Host Channels
The disk array has great flexibility in creating RAID sets. Drives of different
sizes and manufacturers may be combined in a RAID set (Although the
smallest drive in the set will limit how much of the other drives‘ capacity can be
used). The disk array can have as many as 4 RAID sets. Each RAID set can
be assigned a different RAID level. A RAID set may be partitioned into as many
as 4 partitions. Each partition could be mapped to the LUNs of host channel 1
and/or 2. Each host channel will have 8 LUNs maximum for mapping the RAID
partitions. In the following section we will outline the steps needed to create
RAID sets with multiple partitions and then maps them to different host
channels.
For example, you want to create a disk array with two RAID sets. The first
RAID set has two partitions using three drives with RAID level 5 and the
second one has only one partition using two drives with RAID level 1. The
partitions of the first RAID set are mapped to the LUN0 and LUN1 of the host
channel 1 respectively. The partition of the second RAID set is mapped to the
LUN2 of the host channel 1. In addition, the first partition of the first array and
that of the second one set are mapped to the LUN0 and LUN1 of the host
channel 2 respectively. The Figure 4-15 shows the configuration.
