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. |
WARNING | If the administrator improperly removes a hard disk that should not be |
removed when RAID status is Degraded, all data will be lost. |
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. |
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