Knowledge in the nutshell about RAID 1

Rate this item
(0 votes)

Mirrored volume of the first level, creates copies of data on two or more disks. Most solutions, however, limits the number to two. You can work around this limitation by creating a nested array (eg RAID 1 with two RAID 1, which means RAID 11) of more in the description of RAID 10. In theory, the matrix of the first level provides the multiplication of performance in read similar to RAID 0, by reading the data from all components disks at a time.

In practice, neither Windows 7, either built into the SB950 RAID, are not allowed, and the Adaptec allow for it only when read caching enabled. The recording should be unchanged, or be equal like for a single disk. Capacity of RAID 1 is the smallest size of the carrier component, which can be regarded as the biggest disadvantage. The advantage is almost geometric increase in reliability with each disk in the array, and a very simple implementation. Data is stored in a practically unchanged and a single disk with such a matrix can work independently.

Geometric increase reliability RAID 1, you can specify the approximate formula rn, where r means the reliability of a single disk, and n is the number of disks in the array. How easy it count if, for example, our drives have a 5% chance of damage, it's mean that the matrix RAID 1 (composed of two disks) under ideal and statistical independent conditions would be 0.25%. But in reality is not as colorful. Most arrays use a twin models of drive, bought, and probably produced in the same time. In addition, hard work in similar conditions, which implies that the chances of damage them in similar time to grow. The ultimate reliability of RAID 1 is reduced to the chance to damage the last smooth disk in the array at time which will take to detect failures, replacement of the disk (s) and the reconstruction of matrix.

Data Retrieval in Baltimore - raid data recovery services.

We mentioned at first, that should not be confused the backups with RAID. Arrays with redundancy, practically all of the levels marked number from one upwards, protect us from losing data in case of damage to the physical disks. However, we do not protect against data corruption, eg by a virus, accidental overwriting / deletion / change, or even just simple of writing errors. If we want to fully protect our data, RAID give us continuous access to them, because the even breakdown will not block our access, but for the full confidence, made backed security is still necessary.

One of the advantages of RAID 1 is ease of implementation. This allows not only easy way to mirror / multiply the number of drives but also controllers. There is nothing on the way to building a RAID 1 in Windows 7, use a two disks connected to two independent controllers such as the built-in chipset and additional. This procedure is called fission or duplexing (if the matrix has two disks) or multiplexing (in the case of multiple drives). This solution protect us from writing hardware errors. If one of the controllers writes data with errors that we still have the second drive plugged into another efficient controller. Unfortunately, viruses and user errors remain a problem. Easy to implement also gives the advantages of the administration of RAID 1. Since in most cases, damage (only working on one disk) array will retain the full performance of one disk, there is nothing in the way of remove a drive to implement backup. Or you can simply hide the drive and in its place to connect a new one. Of course, depending on how it we will do, the synchronization may be needed (the reconstruction matrix).

Always you can try of RAID repair.

In the first paragraph we told that, in theory, RAID 1 thanks to an independent capability to read data from multiple disks, similar to RAID 0, should multiply the read performance. In addition, the access time to data on two drives should fall by half, and this, as opposed to RAID 0, regardless of the characteristics of that access, so thanks to that, that a full copy of the data is present on everydisk constituent. In practice, many implementations of RAID 1 is able to read the data at once with only one disk, and if even read from both, so the associated overhead with moving the head to the next sector, except for those already read on the remaining disks can effectively offset any gains in the case of sequential transfer. Correct in the records does not exist, because all data must be at the same time saved on hard disks, and lack of complex calculations in this connection does not slow down. Finally, RAID 1 will have a performance similar to a single drive and will give us only the protection against drive failure for the price of capacity of one disk (in the case of matrix of two disks).

Last modified on Tuesday, 26 May 2015 19:43
Data Recovery Expert

Viktor S., Ph.D. (Electrical/Computer Engineering), was hired by DataRecoup, the international data recovery corporation, in 2012. Promoted to Engineering Senior Manager in 2010 and then to his current position, as C.I.O. of DataRecoup, in 2014. Responsible for the management of critical, high-priority RAID data recovery cases and the application of his expert, comprehensive knowledge in database data retrieval. He is also responsible for planning and implementing SEO/SEM and other internet-based marketing strategies. Currently, Viktor S., Ph.D., is focusing on the further development and expansion of DataRecoup’s major internet marketing campaign for their already successful proprietary software application “Data Recovery for Windows” (an application which he developed).

21 comments

  • Comment Link Erika Tuesday, 21 November 2017 03:39 posted by Erika

    I go to see day-to-day a few web pages and websites to read content, except this webpage offers
    quality based content.

  • Comment Link Woodrow Sunday, 19 November 2017 19:09 posted by Woodrow

    I believe that is among the such a lot vital information for
    me. And i am glad reading your article. However want to statement on few general things, The
    website taste is ideal, the articles is truly excellent :
    D. Good job, cheers

  • Comment Link Kennith Thursday, 16 November 2017 13:33 posted by Kennith

    To keeping your belongings safely?

  • Comment Link Stephanie Saturday, 11 November 2017 02:22 posted by Stephanie

    You really make it seem so easy with your presentation but I find this matter to
    be actually something that I think I would never understand.
    It seems too complicated and extremely broad for me. I'm looking forward for your next post, I'll try to get the hang of
    it!

  • Comment Link Imogene Wednesday, 01 November 2017 10:42 posted by Imogene

    It's appropriate time to make some plans for the future and
    it is time to be happy. I've read this post and if I could I desire to suggest you few interesting things or
    tips. Perhaps you can write next articles referring to this article.

    I wish to read more things about it!

  • Comment Link Collin Wednesday, 01 November 2017 04:07 posted by Collin

    What's up Dear, are you actually visiting this web site on a regular basis, if
    so then you will without doubt take fastidious know-how.

  • Comment Link Latonya Tuesday, 31 October 2017 05:18 posted by Latonya

    Howdy would you mind stating which blog platform you're using?
    I'm going to start my own blog soon but I'm having a hard time
    selecting between BlogEngine/Wordpress/B2evolution and
    Drupal. The reason I ask is because your design and style seems different then most blogs
    and I'm looking for something unique.
    P.S Sorry for getting off-topic but I had to ask!

  • Comment Link Mallory Thursday, 26 October 2017 07:56 posted by Mallory

    Its such as you read my mind! You seem to know so much approximately this, such as
    you wrote the e-book in it or something. I think that
    you simply can do with a few p.c. to power the message house a little bit, but other than that, this is wonderful blog.
    An excellent read. I'll definitely be back.

  • Comment Link Darci Thursday, 26 October 2017 01:57 posted by Darci

    I'm amazed, I have to admit. Seldom do I come across a blog that's
    both educative and amusing, and without a doubt, you've hit the nail on the head.
    The problem is something that not enough men and women are speaking intelligently about.
    I'm very happy that I found this during my search for something
    regarding this.

  • Comment Link Wilson Tuesday, 24 October 2017 20:16 posted by Wilson

    After I originally left a comment I seem to have clicked
    on the -Notify me when new comments are added- checkbox and now
    every time a comment is added I recieve four emails
    with the exact same comment. Perhaps there is a means you
    can remove me from that service? Many thanks!

Leave a comment

Make sure you enter the (*) required information where indicated. HTML code is not allowed.