QNAP TR-004-US User Manual

4. RAID Conguration
This section provides information on conguring RAID settings.
Important
The following situations will interrupt the connection to the RAID enclosure, causing data
being written to the drives to be lost.
• Creating or deleting a RAID group while another RAID group or disk is in use
• RAID group failure (excluding degraded mode), or adding or removing a RAID group
while another RAID group is in use
• Inserting or removing a drive when the RAID enclosure is in Individual mode
• Pressing and holding the Set button for three or more seconds, until the RAID
enclosure beeps
Supported RAID Types
QNAP external RAID enclosures support several RAID types.
Important
• When disks with dierent capacities are combined in one RAID group, all disks
function according to the capacity of the smallest disk. For example, if a RAID group
contains ve 2 TB disks and one 1 TB disk, the total capacity will be 6 TB.
• You can only use one disk type (HDD or SSD) in a RAID group. Combining dierent
types of disk in one RAID group is not supported.
• QNAP recommends creating separate RAID groups for each capacity and type of disk.
Note
The RAID enclosure does not support capacity expansion or RAID-level migration.
RAID Type Number of
Disks
Description Compatibility
JBOD (Just a
Bunch of Disks)
2 or more • 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
benets.
• Unless you have a specic reason to use
JBOD, use RAID 0 instead.
• TR-002
• TR-004
QNAP External RAID Enclosure User Guide
RAID Conguration 25

QNAP TR-004-US Specifications

General

Brand	QNAP
Model	TR-004-US
Category	Enclosure
Language	English