Visionman SCM200 Guía de usuario descargar pdf (Pagina 30)

Storage Screens 2 & 4 DRIVE USER GUIDE

Page 30 of 57

Default RAID configuration - The default RAID configuration for each hard drive installed on SCM200 is

as follows:

• If one drive is installed to an empty drive bay, the default RAID configuration is mirror and

the volume status is degraded.

• If system has one hard drive and a new hard drive is added, the default RAID configuration

is mirror and the volume status is good.

• If two hard drives are installed to an empty drive bay, the default RAID configuration is span.

SCM400 supports the following RAID levels:

Stripe (RAID 0) - All data are distributed evenly to all existing drives. The two drives work in unison to

maximize system performance. However, RAID 0 has high risks of data security. If one drive fails then

all the data in both drives is lost.

Mirror (RAID 1) - Two hard drives are required. Data written to one hard drive is simultaneously duplicated

to another hard drive. If one drive fails, the other drive continues to function as a single drive until the

failed drive is replaced. If you have four drives, the system will offer the mirror option as “Two Mirror”.

In this configuration, up to two drives can fail before any data is lost.

Span - Also known as a Linear array. Two hard drives are required. Several hard drives are configured

as a single volume with a size equal to the total of all the member disks. However, span does not

increase system performance or data security.

RAID 5 – A minimum of three hard disks is required for this array type. This is a striped array with

distributed parity, forming a redundant array. This type of array gives good performance and protects the

data against any single drive failure.

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 56 57

Sin comentarios

Visionman SCM200 Guía de usuario Pagina 30