RAID 10

To offer superior quality of service, WebTop offers RAID 10 redundancy (offering both RAID 1 and RAID 0 as depicted) on their hosting servers to give you peace of mind that your data is both safe, secure, and highly accessible to you and your business.

 

About RAID

 

RAID stands for describe a Redundant Array of Inexpensive Disks, a technology that allowed computer users to achieve high levels of storage reliability from low-cost and less reliable PC-class disk-drive components, via the technique of arranging the devices into arrays for redundancy. 

 

Redundancy is achieved by either writing the same data to multiple drives (known as mirroring), or writing extra data (known as parity data) across the array, calculated such that the failure of one (or possibly more, depending on the type of RAID) disks in the array will not result in loss of data. A failed disk may be replaced by a new one, and the lost data reconstructed from the remaining data and the parity data. Organizing disks into a redundant array decreases the usable storage capacity. For instance, a 2-disk RAID 1 array loses half of the total capacity that would have otherwise been available using both disks independently, and a RAID 5 array with several disks loses the capacity of one disk. Other types of RAID arrays are arranged so that they are faster to write to and read from than a single disk.

There are various combinations of these approaches giving different trade-offs of protection against data loss, capacity, and speed. RAID levels 0, 1, and 5 are the most commonly found, and cover most requirements.

  • RAID 0 (striped disks) distributes data across several disks in a way that gives improved speed and no lost capacity, but all data on all disks will be lost if any one disk fails.
  • RAID 1 (mirrored settings/disks) duplicates data across every disk in the array, providing full redundancy. Two (or more) disks each store exactly the same data, at the same time, and at all times. Data is not lost as long as one disk survives. Total capacity of the array equals the capacity of the smallest disk in the array. At any given instant, the contents of each disk in the array are identical to that of every other disk in the array.
  • RAID 5 (striped disks with parity) combines three or more disks in a way that protects data against loss of any one disk; the storage capacity of the array is reduced by one disk.
  • RAID 6 (striped disks with dual parity) (less common) can recover from the loss of two disks.
  • RAID 10 (or 1+0) uses both striping and mirroring. "01" or "0+1" is sometimes distinguished from "10" or "1+0": a striped set of mirrored subsets and a mirrored set of striped subsets are both valid, but distinct, configurations.

RAID can involve significant computation when reading and writing information. With traditional "real" RAID hardware, a separate controller does this computation. In other cases the operating system or simpler and less expensive controllers require the host computer's processor to do the computing, which reduces the computer's performance on processor-intensive tasks. Simpler RAID controllers may provide only levels 0 and 1, which require less processing.

 

RAID systems with redundancy continue working without interruption when one (or possibly more, depending on the type of RAID) disks of the array fail, although they are then vulnerable to further failures. When the bad disk is replaced by a new one the array is rebuilt while the system continues to operate normally. Some systems have to be powered down when removing or adding a drive; others support hot swapping, allowing drives to be replaced without powering down. RAID with hot-swapping is often used in high availability systems, where it is important that the system remains running as much of the time as possible.

 

RAID is not a good alternative to backing up data. Data may become damaged or destroyed without harm to the drive(s) on which they are stored. For example, part of the data may be overwritten by a system malfunction; a file may be damaged or deleted by user error or malice and not noticed for days or weeks; and, of course, the entire array is at risk of physical damage.

 

Find out more about RAID here

Web News

TigerDirect Black Friday ad features handful of laptop, desktop deals
The online tech retailer also has a sale on a 12-inch Huawei MateBook Windows tablet for $399.99.
--- 19 Nov 2017 02:26 PM

iPhone and Android wireless charger pads: Which one is the best?
Choosing a Qi charger pad for your smartphone is not as easy as it sounds.
--- 18 Nov 2017 08:26 AM

How strong are iPhone X sales?
In the absence of official figure, we have to go mining through third-party data to try to come to some conclusions.
--- 18 Nov 2017 07:14 AM

Apple HomePod's release delayed until 2018
The smart speaker was slated for release in December, but it's not quite ready, Apple says.
--- 18 Nov 2017 04:26 AM

Solve Gmail's other big hassle -- for free
Chrome extension Dittach makes quick and easy work of finding Gmail attachments.
--- 18 Nov 2017 04:24 AM

Company Blog


Search Behaviour

Posted Tuesday, 19 October 2010 at 05:58 by Andrew Liu


As an SEO provider, you have one main goal. Get your clients website to show up in search results fo...

Read more...



sm bus drivers missing in Device Manager

Posted Sunday, 18 April 2010
Updated Sunday, 24 February 2013 at 06:39 by Andrew Liu


When installing a new Windows XPinstallation, I seemingly always miss some drivers. One that trouble...

Read more...



Multiple Domains for SEO performance?

Posted Friday, 05 March 2010 at 23:13 by Andrew Liu


Online businesses and websites that cover a broad range of topics or one large topic are sometimes b...

Read more...



Tag Clouds - SEO or not?

Posted Thursday, 04 March 2010 at 04:34 by Andrew Liu


A tag cloud or word cloud is a visual depiction of tags or words related to a site, typically used t...

Read more...



Mozilla Thunderbird and Gmail IMAP Attachments Bug

Posted Wednesday, 03 March 2010 at 20:15 by Andrew Liu


I've been using Gmail since its early inception, and Iwas one of the first to utilise Gmail's IMAPfe...

Read more...



Read more blogs...