Atlantis Land DiskMaster F301D - Manuale (Pagina 49)

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DiskMaster 49
Creating the RAID system will take several hours,
depending on HDD capacity. Do not turn off the power or
interrupt the system in any other way during this process!
We recommend using the EXT2 file system for optimum
performance and functionality. Changing the RAID setup
will require you to re-format the drives. Make sure you
backup all data before doing so!
There are 3 differents RAID mode:

RAID 0 = RAID 0, known as disk striping, has generally
the best performance, but does not offer any
redundancy. In this level, data is broken into small
units called sectors, and sectors are distributed across
all disks in the array. As it does not provide any data
protection, if any disk in the array fails then all data in
the array is lost. Such stripes allocation allows to
enhance I/O performance.

RAID 1 = RAID Level 1, known as disk mirroring, is a
popular approach to protect data from adisk failure. To
implement RAID Level 1, you need at least two
physical hard drives. As the disks are paired up, all
disk writes are duplicated on both disks. You can back
up data without interruption using this algorithm. In
case of a disk failure, the system can continue to run
without being affected.

JBOD =JBOD (Just a Bunch Of Disks) is a group of
disks. JBOD is not technically RAID but “disk
spanning.” In this mode, all the disks are grouped
together so they appears as a large single disk. Each
disk can operate independently and is seen as an
individual disk. Therefore, the total capacity of JBOD is
the sum of the capacities of each disk. This allows the
user to add disks until the desired total capacity is
reached. Since JBOD provides no performance
increase and data protection, it is seldom used.