RAID levels and Features

RAID levels and features

raid Definition and role : Disk array ; for raising disks IO performance, disk size, and disk redundancy,

Common raid level :raid0;       RAID 1;    RAID5; RAID 10;RAID01;

RAID0 : data is stored on each hard disk like a stripe

Advantage: Improves disk read and write performance. Disadvantage: There is no redundancy, as long as a hard disk failure data will be damaged.

Number of disk blocks: minimum two blocks

Raid1:The data is mirrored. Advantage: Redundant backup function is more. Disadvantage: High cost.

number of disks: at least 2 faster. Most?

RAID5 : A hard drive to act as a check disk that consumes part of The CUP is used for verification and is redundant to allow up to one disk failure.

capacity is N (Mix)-1

RAID10 : disk first made RAID1 after making RAID0 to the IO performance has improved, at least 4 disk,RAID1 Two disk is bad, the data is lost.

RAID01: disk first made RAID0 and then made RAID1 with redundant backup, and improve IO performance, a minimum of 4 disks required, only allow RAID0 A disk failure occurred in the. Personally, do you still need raid01 to have raid10 ?

RAID levels and features

raid Definition and role : Disk array ; for raising disks IO performance, disk size, and disk redundancy,

Common raid level :raid0;       RAID 1;    RAID5; RAID 10;RAID01;

RAID0 : data is stored on each hard disk like a stripe

Advantage: Improves disk read and write performance. Disadvantage: There is no redundancy, as long as a hard disk failure data will be damaged.

Number of disk blocks: minimum two blocks

Raid1:The data is mirrored. Advantage: Redundant backup function is more. Disadvantage: High cost.

number of disks: at least 2 faster. Most?

RAID5 : A hard drive to act as a check disk that consumes part of The CUP is used for verification and is redundant to allow up to one disk failure.

capacity is N (Mix)-1

RAID10 : disk first made RAID1 after making RAID0 to the IO performance has improved, at least 4 disk,RAID1 Two disk is bad, the data is lost.

RAID01: disk first made RAID0 and then made RAID1 with redundant backup, and improve IO performance, a minimum of 4 disks required, only allow RAID0 A disk failure occurred in the. Personally, do you still need raid01 to have raid10 ?

RAID levels and Features