nodes. Even though you
can
use the rotary switch to select JBOD mode for
any
node in a
cascaded configuration, only the
first
JBOD volume of any subordinate node is detected by your
host. Therefore, selecting JBOD mode for any subordinate node is
not
recommended.
In a
JBOD
configuration, the CoolMax CD-320 directly exposes each physical drive.
Figure 3 - JBOD storage policy sample configuration
FAST
The FAST storage policy distributes access across all hard disks, also called
striping
(equivalent
to RAID 0). FAST presents the best data speed but no data redundancy. FAST storage policy
accelerates hard disk operating speed by using many disks in parallel. Hard drive data segments
are written to different disks simultaneously which increases performance while sacrificing data
redundancy.
To implement the
FAST
storage policy, the CoolMax CD-320 creates a single virtual volume
that is
striped
across both hard drives, with a storage capacity that is equal to the sum of both
hard disk drives.
It is possible to set any node within a cascaded configuration to FAST, although there is no
performance benefit when using multiple layers of striping.
Figure 4 - FAST storage policy sample configuration
SAFE
CD-320
CD-320
