Thecus N2200EVO User Manual download pdf (Page 112)

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This is excellent for complete data security.

RAID 5

RAID 5 offers data security and it is best suited for networks that perform many

small I/O transactions at the same time, as well as applications that require data

security such as office automation and online customer service. Use it also for

applications with high read requests but low write requests.

RAID 5 includes disk striping at the byte level and parity information is written to

several hard disk drives. If a hard disk fails the system uses parity stored on each of

the other hard disks to recreate all missing information.

JBOD

Although a concatenation of disks (also called JBOD, or "Just a Bunch of Disks") is

not one of the numbered RAID levels, it is a popular method for combining multiple

physical disk drives into a single virtual one. As the name implies, disks are merely

concatenated together, end to beginning, so they appear to be a single large disk.

As the data on JBOD is not protected, one drive failure could result total data loss.

Stripe Size

The length of the data segments being written across multiple hard disks. Data is

written in stripes across the multiple hard disks of a RAID. Since multiple disks are

accessed at the same time, disk striping enhances performance. The stripes can

vary in size.

Disk Usage

When 2 or 4 disks are of the same size, and used in RAID, Thecus IP storage disk

usage percentage is listed below:

n number of installed HDDs

RAID Level Percentage

Used

RAID 0 100%

RAID 1 1/n x 100%

RAID 5 (n-1)/n x 100%

JBOD 100%

1 2 ... 107 108 109 110 111 112 113 114 115 116 117 118

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Thecus N2200EVO User Manual Page 112