Allnet ALL6800, Руководство пользователя

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RAID Level
You can set the storage volume as JBOD, RAID 0, RAID 1, RAID 5, RAID 6 or
RAID 10. RAID configuration is usually required only when you first set up the
device. A brief description of each RAID setting follows:
RAID Levels
Level Description
JBOD
The storage volume is a single HDD with no RAID support. JBOD
requires a minimum of 1 disk.
RAID 0 Provides data striping but no redundancy. Improves
performance but not data safety. RAID 0 requires a minimum of
2 disks.
RAID 1 Offers disk mirroring. Provides twice the read rate of single
disks, but same write rate. RAID 1 requires a minimum of 2
disks.
RAID 5 Data striping and stripe error correction information provided.
RAID 5 requires a minimum of 3 disks. RAID 5 can sustain one
failed disk.
RAID 6 Two independent parity computations must be used in order to
provide protection against double disk failure. Two different
algorithms are employed to achieve this purpose. RAID 6
requires a minimum of 4 disks. RAID 6 can sustain two failed
disks.
RAID 10 RAID 10 has high reliability and high performance. RAID 10 is
implemented as a striped array whose segments are RAID 1
arrays. It has the fault tolerance of RAID 1 and the performance
of RAID 0. RAID 10 requires 4 disks. RAID 10 can sustain two
failed disks.
RAID Configuration
Using RAID Settings, you can select stripe size, choose which disks are RAID
disks or the Spare Disk. .
RAID Configurations
Item Description
RAID
Check the boxes of the hard drives you wish to add to the
storage volume.
Master RAID Check a box to designate this as the Master RAID volume. See
the NOTE below for more information.
Disk No. Number assigned to the installed hard disks.
Capacity (MB) Capacity of the installed hard disks.
Model Model number of the installed hard disks.
Status Status of the installed hard disks.
Member If this is checked, current hard disk is a part of a RAID volume.
Spare If this is checked, current hard disk is designated as a spare for
a RAID volume.
Stripe Size This sets the stripe size to maximize performance of sequential
files in a storage volume. Keep the 64K setting unless you
require a special file storage layout in the storage volume. A
larger stripe size is better for large files.
Used Percentage The percentage of the RAID volume that will be used to store
data.
Apply Press this button to configure a file system and create the RAID
storage volume.
WARNING
If the administrator improperly removes a hard disk that should not be
removed when RAID status is Degraded, all data will be lost.