RAID Data Recovery – How It Works

May 17, 2018


RAID data recovery is probably one of the most complex processes any data recovery firm can perform. More often than not, the problems are compounded by the actions of the client prior to sending the drives in for recovery. Many users feel that it is important to try and recover the data themselves or repair the array through various system utilities, and this may be fine if the data is not critical. However, it has been our experience that when you have a RAID failure that has resolved in substantial data loss, more often than not, somebody's job is on the line if that data is not recovered. The largest piece of advise this article can provide in the event of a RAID failure: LEAVE IT ALONE.

IT professionals have a lot of pressure placed on them when a catastrophic system failure occurs. It is their job to make sure that all systems are up and running. Many times, out of panic, troubleshooting processes are initiated in order to correct the problem. Often times these processes only make a bad situation even worse, and in many instances they can render the data unrecoverable. Let's keep in mind what this data can consist of in an average corporate environment. You are probably dealing with information that cost many hundreds of thousands of dollars in labor and resources to create. Much of the data probably can not be duplicated. The intellectual value alone could have been in the many millions of dollars. Corporate executives really do not care to hear about how the failure occurred, or what unbelievable string of events led up to the server crashing. They do not care to hear the technical jargon as you try to explain to them what happened, and hope they understand that it was not your fault. They only want to know one thing … "Why was this data not backed up, and how can we get it back?"

Instead of taking chances on your own, call a data recovery professional. RAID data recovery can be expensive, but in most cases it is much less costly than trying to recreate the data that has been lost. There is a set procedure that most data recovery professionals follow when it comes to performing any recovery work. These procedures are followed and expanded upon when dealing with a RAID recovery. The first step of any RAID recovery is to make sure all of the drives are functional. In order to properly complete the recovery it is essential that all drives are fully functional (this is especially true with a RAID 0). This may involve taking any physically damaged drives into the clean room, in order to make the necessary repairs so that they function normally again. Once that is completed the next step is to make complete, sector-by-sector clones of every drive. This is not "Ghosting", but a very low-level process that allows the recovery technician to work around bad sectors, and have complete control over how the drive functions. During the cloning process, the original source drive that you sent in, is generally put in a "write protect" mode so that no data can be written to the drive. This insures that the original source data is not altered in any way.

Once the cloning process is complete, the original drives you sent in are set off to the side and are no longer touched. The actual recovery process is performed on the cloned copies, so nothing that is done during recovery can make the situation worse. After the drives are cloned, they will be loaded into an emmulator and destriped. Destriping is like taking the scattered pieces of a puzzle and putting them together neatly. Simply stated, destriping is taking the data scattered among the multiple drives that make up array and placing it onto a single destination drive. From there we have a single drive in which we can complete what we would consider to be a "normal" recovery. We can complete this process even at the multi-terrabyte level. If the damage to the stripe is not too severe, in most cases a complete rebuild of the directory structure and all associated data can be completed.

As mentioned earlier, RAID data recovery can be expensive. Depending on the company you contact the prices can vary considerably. Typically a RAID recovery can be priced anywhere from $ 800 to $ 3,000 per drive. A number of factors influence the cost, such as RAID type, file system, total size, situation of failure, etc. Many times attempt fees and assessment fees are charged if the data is unrecoverable. This is understandable due to the amount of time and resources required to perform a single RAID recovery. However, in most cases the costs involved in recovering the data are not even 1% of the data's overall value. If you are reading this article and you have not suffered a RAID failure, what are you waiting for? Back up your data NOW.


  • Subho Seth May 17, 2018 at 12:50 pm

    Sir I had a also open heart surgery on 1999. My age is 18 so I can do workout please tell me….

  • Vipul Saini May 17, 2018 at 12:50 pm

    hello sir my heart operation in 2017 my age 18 my heart in 2 hole after operation of 8mouth i can jim or not please tell me

  • Daryl Hartley May 17, 2018 at 12:50 pm

    I have had 2 open heart surgeries.
    2001 and 2013. I am fully recovered with a about 85% . If you are getting back to lifting just make sure that you are not straining during the lift. Keep the reps 12 to 15. And keep doing your cardio. 💪 I know the video is old and I hope that you are doing well.

  • Pamela Daniels May 17, 2018 at 12:50 pm

    I had a quadruple bypass in 2013 I would like to know what exercises you can do to lose the female stomach

  • Joe Guminski May 17, 2018 at 12:50 pm

    I had open surgery almost 4 months .. Doing lite flies @7.5 lbs each arm What do u think?

  • Papa Medvedya May 17, 2018 at 12:50 pm

    Thanks for posting this video

  • Jeffrey Bishop May 17, 2018 at 12:50 pm

    I'm celebrating my 50th anniversary of my open heart surgery. I swim and swim and swim a lot for my exercise in the gym. I have brought my lung capacity of 64% in 2007 to now 82%.

  • Sponge Bob May 17, 2018 at 12:50 pm

    I love the song in the background #houseOfTheRisingSun

  • Baker Akram May 17, 2018 at 12:50 pm

    hi there Lee, very helpful video thank you, i actually have the same issue as Arnel, i had an open heart surgery, and i started going to the gym recently, the purpose is not to build my body, i just want to keep fit, my physician instructed me to walk, so im focusing on the treadmill and bicycle, how do you advice me to train? i would really appreciate it if you can give your professional advice

  • Ricky Alexander May 17, 2018 at 12:50 pm

    i just had heart surgery im trying fine my strenght back to go bck to work or work out first

  • Stephen Mitchell May 17, 2018 at 12:50 pm

    Hi Lee I had a Double Heart Bypass in Jan 2015 and am back at work I feel good I will look at your vids and try to get back fit if not fitter but will use 2-5 pound weights to start off with would that be ok ? thanks

  • rocketboomboom May 17, 2018 at 12:50 pm

    Great job Arnel! You are one tough son of a gun. Also, as alway, Right on Lee!

  • Gabriel Gagne May 17, 2018 at 12:50 pm

    Hey lee do you think you could make a video on how to place the bar on your shoulders when doing squats. You made videos on how to help with pain but nothing about proper technique thank you

  • Sean Cook May 17, 2018 at 12:50 pm

    Thanks Lee, I am also starting over due to a life saving heart surgery so baby steps it is!

  • slip123321 May 17, 2018 at 12:50 pm

    Lee, I can't seem to gain strength on the bench press. One week I can rep out 7 to 8 reps with 185, and the next week I might only be able to do sets of 6.. I am getting stuck and highly frustrated.. I am making sure I'm eating a lot (caloric surplus) and getting sufficient rest. Please make a video on this!!!!!!!

  • Rezky Gunawan May 17, 2018 at 12:50 pm

    great answer lee

  • Jesus Dominguez May 17, 2018 at 12:50 pm

    I like what Lee said. Remember when you had an open heart surgery or a CABG I assume, aerobic training is gonna be an important part of getting you back and ready for your weight lifting. When going back to lifting there are three things you have to keep in mind:
    1. Sternal precautions. Remember they just had to cut your sternum (breast bone) right in the middle and thus this is going to be weak (depending on how many months it has been). Chest presses, chest flies, or any exercises that involve using your pecs, will carry a lot of stress to your sternum as your pec major attaches there.
    2. You have to know what your Maximal Heart Rate is. An easy formula to do this is 220- your age. For instance, if your age is 50 then your maximal heart rate will be 170. Now. You don't wanna get to your Maximal Heart Rate but rather do 70-80 % of that. For the above example 170 x .7 = 119. 170 x .8 = 136. Now you don't want to be at 136 right away. The lower your heart rate the less stress you put to your heart.
    3. Diet is very important. Remember fat in your arteries is what caused you to have surgery. Stay away from foods that will build up more plaque in your arteries.
    Ask your doctor what he recommends as far as exercise parameter, etc. Remember it also depends on how many bypasses they had to do.

    Congratulations for your successful surgery and stay healthy.

  • Troll_King May 17, 2018 at 12:50 pm

    Is there a advantage to do incline bench press and flat bench press during ur chest day , I personally only do flat and was wandering if I should start incorporating incline and decline press and if it helps.

  • Wackjobmcjonson May 17, 2018 at 12:50 pm

    Who is better, Aloe Blacc or Snoop Dog? Please respond soon Lee!

  • marcior362 May 17, 2018 at 12:50 pm

    Good job Lee

  • ozamatzzbuckshank May 17, 2018 at 12:50 pm

    Hey Lee, great video as always. But do you know any places that sell dietary quarters?

  • Dirtymoney$$$ May 17, 2018 at 12:50 pm

    what should i do if i wanna get back to the gym but my moms dad which is my grandpa wants to go to a bonjovi concert and its 18.99 per ticket which is too much money and the gym doesnt have nice machines im only 14 and i want to drive also i drink a lot of coffeee and hot chocolate coffee can i work out or will i get an injury. thanks

  • Vishnu Ganjari May 17, 2018 at 12:50 pm

    Dear Lee… do you have any good SAT tips? I'm looking to get to my goal which is an 1800?

  • MyDeArmAsTeR1 May 17, 2018 at 12:50 pm

    lee when are you training with the sith lord?

  • Dayummm15 May 17, 2018 at 12:50 pm

    Lee, what do you think about Kanye West's new album, Yeezus

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