Thecus Technology 1U4500R - Manual (Page 25)

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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.
Excellent performance and good fault tolerance. 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.
Disk Settings
Using Disk Settings, you can select stripe size, choose which disks are RAID
disks or the Spare Disk, as well as enter a name for each disk.
Disk Settings
Item Description
RAID
Check the boxes of the hard drives you wish to add to the
storage volume.
Spare Check a box to designate the replacement HDD for the storage
volume. This becomes the backup for any damaged hard drives.
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.
User Percentage Data Percentage: The percentage of the RAID volume that will
be used to store data.
Target USB Percentage: The percentage of RAID volume that
will be used as USB disk.
Snapshot Percentage: The rest of the RAID volume will be
used to store the Snapshot.
Add Linear Under JBOD mode, if you would like to add more disks to the
current RAID, select a disk by clicking on the checkbox in the
RAID column for that disk and click Add Linear to add the new
disk into the RAID volume.
Add Spare Press this button to add a new Spare disk.
Remove Click to remove the RAID volume. All user data, snapshot, and
Target USB data will be removed.
Create RAID Press this button to configure a file system and create the RAID
storage volume.
Creating a RAID
To create a RAID volume, follow the steps below:
1. On the RAID Configuration screen, set the RAID storage space as JBOD,
RAID 0, RAID 1, RAID 5, RAID 6, or RAID 10 — see Appendix C:
RAID Basics for a detailed description of each.
2. Tick the checkboxes of the hard disks you wish to use to create a RAID.
WARNING
If the administrator improperly removes a hard disk that should not be removed
when RAID status is Degraded, all data will be lost.