User manual

RAID 6

The RAID 6 group is ideal for critical data protection needs. To

create a RAID 6 group, a minimum of 4 hard disks are required. The

total capacity of the RAID 6 group is equal to the size of the disk

with the smallest capacity in the array times the number of (hard

disks – 2). It is recommended (though not required) that only hard

drives of the same brand and capacity are used to establish the most

efficient hard drive capacity. RAID 6 can survive 2 disk failures and

the system can still operate properly.

Note:

To install a new disk when the server is running, first be sure

the disk volume is in the "degraded" mode. Or, wait to hear two long

beeps after the disk crash and then insert the new disk in place of

the failed disk.

RAID 10

RAID 10 is a combination of RAID 1 (mirroring) and RAID 0 (striping),

without parity. RAID 10 is a stripe across a number of disks to

provide fault tolerance and high speed data transfer. The storage

capacity of a RAID 10 group is equal to the size of the disk with the

smallest capacity in the array times (the number of hard disks in the

array/2). It is recommended that only hard disk drives of the same

brand and capacity are used to create a RAID 10 group. RAID 10 is

suitable for high volume transaction applications, such as a

database, that require high performance and fault tolerance. A

maximum of 2 failed disks from 2 different pairs are allowed in RAID

10.

Note:

To install a new disk when the server is running, first be sure

the disk volume is in the "degraded" mode. Or, wait to hear two long

beeps after the disk crash and then insert the new disk in place of

the failed disk.

JBOD

Two or more disks can be combined into one larger volume. Files are

sequentially saved on physical disks. The overall capacity of the

linear disk is the sum of the capacity of all disks. This configuration

does not provide disk failure protection; failure of one drive will cause

the entire array to be lost. A JBOD group is generally used for storing

a large amount of data. It is not appropriate for storing sensitive

data.