User manual
English
3-16
storaGe ManaGeMent web interFace
RAID Types
RAID Types Dened
moDe DescrIptIon
Single A single hard drive is used. All data is lost in the event of a hard drive failure.
JBOD
RAID functionality is not available in JBOD (Just a Bunch of Disks) mode. Data is written
sequentially on the designated disks. Both hard drives are combined to form a single larger
disk.
Note:
If you are using two identical HDDs, it is recommended to use RAID 0.
RAID 0
Both hard drives are combined and the available capacity of each disk is added into a
single logical volume. Redundancy or parity is not available. RAID0 offers the best perfor-
mance, however, there is no disk failure protection.
IMPORTANT:
If a single disk in RAID 0 fails, the data in both disks is inaccessible due to the RAID 0
cross-disk writing function.
RAID 1
Dual hard drives are required. RAID 1 is a secure mode, providing mirroring functionality.
The data is duplicated between both HDDs, and, in the event of a single disk failure, the
data is available in the healthy disk. RAID 1 is recommended for disk failure protection.
However, available disk space is reduced by 50% due to the mirroring function.
Only RAID 1 supports hot-swap functionality. All other modes require you to power down
the device before removal of hard drives.
IMPORTANT:
Changing RAID types erases all data stored on your storage disks. If there is saved data
on the drive(s), backup your data before proceeding.
IMPORTANT:
Only RAID 1 supports hot-swap functionality. All other modes require you to power down
the device before removal of hard drives.
The Disk Manager function displays model, capacity and status of the available hard drives. You
can view the health status, remove, check, format, and unmount a disk drive.
Creating a RAID Mode
IMPORTANT:
Changing RAID types erases all data stored on your storage disks.If there is saved data on
the drive(s), backup your data before proceeding.
In a Single Disk Volume, a second drive is not supported. After creating a Single Disk Vol-
ume, you must power off the system before installing a second hard drive.
CAUTION:
Installing a second hard drive in a Single Disk Volume while the system is powered on is
not recommended.