4. RAID Configuration
This section provides information on configuring RAID settings.
Supported RAID Types
QNAP drive adapters support several RAID types.
Important
• When disks with different capacities are combined in one RAID group, all disks
function according to the capacity of the smallest disk.
• You can only use one disk type (HDD or SSD) in a RAID group. Combining different
types of disk in one RAID group is not supported.
RAID Type Number of Disks Description
JBOD (Just a Bunch
of Disks)
2 • JBOD combines disks together in a linear fashion. The
system writes data to a disk until it is full, and then
writes to the next disk.
• JBOD allows all of the disks capacity to be used, but
does not provide any disk failure protection or
performance benefits.
• Unless you have a specific reason to use JBOD, use
RAID 0 instead.
RAID 0 2 • Disks are combined together using striping.
• RAID 0 offers the fastest read/write speeds and uses
the total capacity of all the disks.
• RAID 0 provides no disk failure protection. This RAID
type must be paired with a data backup plan.
• RAID 0 is recommended for high performance
applications such as video editing.
RAID 1 2 • An identical copy of data is stored on two disks. If either
disk fails, data can still be read from the other disk.
• Half of the total disk capacity is lost, in return for a high
level of data protection.
• RAID 1 is recommended if you have two disks.
QNAP Drive Adapter User Guide
RAID Configuration 11
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