Operation Manual

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RAID 10
RAID 10 is a combination of RAID 1 (mirroring) and RAID 0 (striping),
without parity. RAID 10 is a stripe across a number of disks to provide
fault tolerance and high speed data transfer. The storage capacity of a
RAID 10 group is equal to the size of the disk with the smallest capacity
in the array times (the number of hard disks in the array/2). It is
recommended that only hard disk drives of the same brand and capacity
are used to create a RAID 10 group. RAID 10 is suitable for high volume
transaction applications, such as a database, that require high
performance and fault tolerance. A maximum of 2 failed disks from 2
different pairs are allowed in RAID 10.
Note: To install a new disk when the server is running, first be sure the
disk volume is in the “degraded” mode. Or, wait to hear two long beeps
after the disk crash and then insert the new disk in place of the failed
disk.
JBOD
Two or more disks can be combined into one larger volume. Files are
sequentially saved on physical disks. The overall capacity of the linear
disk is the sum of the capacity of all disks. This configuration does not
provide disk failure protection; failure of one drive will cause the entire
array to be lost. A JBOD group is generally used for storing a large
amount of data. It is not appropriate for storing sensitive data.
Configuring Alert T hreshold
The alert threshold is used to remind users when the capacity of a chosen storage pool
is used up to the specified threshold level. A warning message will pop up when the
specified threshold level is reached.
To set an alert threshold, select a storage pool, click “Set Threshold”, enter the
threshold level, and click “Apply”.