Jump to content

[FAQ] Raid Configurations


Recommended Posts

Redundant Array of Independent (or inexpensive) disks, a method to increase the safety of storage in a disk system. Multiple disks cooperate and are seen as one by the system via a special controller. By having the data (disk mirroring) onto multiple disks at once (redundancy) it achieves a higher grade of security. Disk stripping is also used. There are several levels of RAID with different grades of redundancy (short description):




RAID 0 - Disk striping which divides the data on multiple physical disk units.

RAID 1 - Disk mirroring which consists of two disks who stores identical parrarel data.

RAID 2 - Divides the data sections between multiple disk units where some of the units are for storage of error handling codes.

RAID 3 - Uses the same section breakdown method as RAID 2, but one disk unit in the group is for storing (parity data(translation?)

RAID 4 - Pretty much identical with raid 3, but using a larger data striping. RAID 4 does not give any major advantage over RAID 3, and is rarely used.

RAID 5 - Is not using a special (parity data(translation?) as RAID 4. Every unit in the array stores sequentially the parity information to different sets of strips.

RAID 6 - Enhances fault tolerance of RAID 5 by adding yet another parity unit.

RAID 10 - Uses both the advantages from RAID 0 and RAID 1 and is often called RAID 0+1.

RAID 53 - A combination of RAID 0 and RAID 3. Incoming data is shredded between two RAID 3 arrays.



Using multiple sets of the same data or devices to ensure safety or function. Data Storage Systems like RAID is based on a redundant system.


I hope someone finds this useful!


Happy reading!

Edited by KevinN
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...