Common RAID Types
- RAID 0: Striped disks that provide improved performance but no fault tolerance. If any disk fails it is possible all disks in the array will also fail.
- RAID 1: Mirrored disks that provide protection from disk errors or failures. The array continues to function as long as at least one drive is operational.
- RAID 2: Offers redundancy by synchronizing in very small stripes.
- RAID 3: Striped set of disks with dedicated parity. Improves performance and fault tolerance by using a dedicated parity disk. Allows for continued operation even during the lose of the parity drive.
- RAID 5: Striped set of disks with rotating parity. Has the same fault tolerance ability as RAID 3. Improves a lot performance on random write in comparison to RAID 3. Allows for continued operation even during the lose of the parity drive.
Featured Video
RAID Support
3ware: RAID Support
Intel: RAIDSupport
areca: RAID Support
apple: RAID Support
hp: RAID Support
Dell: RAID Support
- This page was created by Jduvall, a Part Time Guide in the Mahalo Greenhouse (see the original), and curated by Amber O.
If you'd like to help us create the best spam free search results on the Internet, apply to be a Part Time Guide!</em>
Software-based Raid or Hardware-based Raid, does it matter anymore?(1 Answer)
A:
Hardware-based Raid is always better. Also file system type is also important. I really like ZFS from Sun. With ZFS you can format and write to the drive ...
500GB external USB drive just croaked. Time to get NAS. Need to be able to replace dead drives and not lose data. Any recommendations?(1 Answer)
A:
There are many external RAID systems available but it's important to choose one with RAID 1 support and make sure it's set up this way after ...
How do you calculate a hardware RAID for a server? (1 Answer)
A:
This is a link to an Excel sheet with formulas for calculating RAID requirements: http://www.cozumpark.com/files/folders/40471/download.aspx You can also find the ...
References
Fast Facts
-
Fact:
Mostly used on servers
-
Fact:
Comes in many different levels
-
Fact:
Increases performance, reliability and availability
