RAID Data Recovery – How It Works

May 3, 2018

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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.

44 Comments

  • Fallout Plays May 3, 2018 at 6:35 pm

    Really getting close to 50k subs! Not bad for a hobby 🙂 Thanks all for your support! More vids & guides coming.

  • Joseph Abeytia May 3, 2018 at 6:35 pm

    Don't know if you check comment from old vids but love your work.
    Going based of the 1.5crit multiplier mida ranges from 43.5/29 To 44.1/29.4.
    Based of this, 3 resilience is somewhere between
    188.5 – 191.1.
    Its my believe that Merc's estimations might be off by 1 resilience each.

    Another reason I believe this is bc i main sturm. When you add the extra precision damage to sturm after and energy kill the gun ranges from 72.5/47 73.1/47.4 with 2crit/1body
    Which is 192.4-193.6

    The chart shows that 4resielnce is about 194hp but i know it to be between 192.4-193.6 at the most bc i have no problem killing them with 2crit/1body.

    Frustrating we dont know the precision multipliers for every archetype of weapon bc it would help find a closer estimate to resielnce hp values

  • Lexicon Prime May 3, 2018 at 6:35 pm

    Bungie is terrible for not putting this information in the damn game.

  • Estus Flask May 3, 2018 at 6:35 pm

    Wow, this video is polished and well made. Great job. I may just subscribe.

  • D0wnshift May 3, 2018 at 6:35 pm

    You get 2 H.P. per point of Resilience up to 5, and 1 point per point after. So diminishing returns.
    Recovery is the opposite, the more points you put in the more you get out. Pause at 0:54, the jump for 9 to 10 is the biggest gain, so go 10 recovery and 5 resilience if you want to Min/Max your stats and sacrifice other perks like handling and recharge speeds.

  • Forest May 3, 2018 at 6:35 pm

    So pump 5 into res for 10 more health and everything else into recovery or pump the res points into mobility if your a huntard.

    Got it.

  • Edwin Yi May 3, 2018 at 6:35 pm

    Recovery is useless in pvp…resilience and mobility (strafe speed) are way more important.

  • Ampex101 May 3, 2018 at 6:35 pm

    FML Hunter Pve , Mobilty wasted Thanks for info dude

  • Zero May 3, 2018 at 6:35 pm

    thx alot, well i guess its just a support stats

  • Arma Lol May 3, 2018 at 6:35 pm

    wow resilience is fuck.

  • Douglas Harris May 3, 2018 at 6:35 pm

    Hahaha dude the "Math warning" at 4:40 with the nerd wearing glasses was just so funny 🙂 That with your voice explaining it made my LOL !

  • SILVERBRO13 May 3, 2018 at 6:35 pm

    RIP Hunters.

  • g May 3, 2018 at 6:35 pm

    So lets say someone uses the Us gift, gets 9 headshots with no drop off damage, 9×22=198 (7 resilience).
    Taking into account the math you did and rounding it up; 22.4×9=201.6 (max resilience). So basically you are dead from 9 perfect headshots from any auto-rifle from that archetype?

  • Jide Banjo May 3, 2018 at 6:35 pm

    mobility is almost worthless tbh

  • ThisguyQuake May 3, 2018 at 6:35 pm

    I run high mobility for strafing.

  • Dlihc May 3, 2018 at 6:35 pm

    Can I be your friend?

  • DJPlaysGames May 3, 2018 at 6:35 pm

    they should make mobility increase sprint speed, I don't get how they don't see the problem.

  • Soul of a Vagabond May 3, 2018 at 6:35 pm

    Great video! But there's one thing I wanna add since I prefer Mobility (unpopular opinion). The more mobility you have for Warlocks, then your gliding ascent and descent is faster. Don't know about Titan and Hunter's jump didn't really or doesn't have change in the speed.

  • Shannon Haus May 3, 2018 at 6:35 pm

    New sub. Great video!!

  • Mac Olsen May 3, 2018 at 6:35 pm

    Pretty sure mobility also decreases fall damage by quite a bit.

  • BigMan7o0 May 3, 2018 at 6:35 pm

    the problem is any halfway decent player will very rarely hit body shots, so realistically, resilience isn't worth it unless the current meta gun can't kill with all headshots if someone is at 10 resilience.

  • Cory Brandan May 3, 2018 at 6:35 pm

    Our warlocks are exactly twins. 👍🏻

  • froZn991 May 3, 2018 at 6:35 pm

    god mobility is so fking useless its disgusting. i hope they fix soon

  • Clarence Dass May 3, 2018 at 6:35 pm

    My hunter is 10 mobility, 4 resilience and 3 or recovery (I forget) and she does alright in pvp. She runs with the Stompie boots and I pretty much just keep on moving. It is a very niche set up, but paired with the right weapons, it does alright.

  • Josh C May 3, 2018 at 6:35 pm

    "Adjusted the output of the Recovery stat so that characters with the lowest Recovery totals will start regenerating slightly faster" in curse of osiris patch, will you be doing an update to reflect the new recovery changes?

  • Emilio Torres May 3, 2018 at 6:35 pm

    7 resilience alllows you to survive two punches with a sliver of health for you close combat lovers

  • thetute59 May 3, 2018 at 6:35 pm

    Instasub.
    Im new to this and mostly playing pve as titan, and I dont think resilience is worth that much. Like 6-7 should be enough?

  • PsychoBomb100 0 May 3, 2018 at 6:35 pm

    If you are running a warlock I would run with mobility-2 Resilience-6 Recovery-7

  • sindrax May 3, 2018 at 6:35 pm

    so a warlock can get 10 mobility but a hunter can't get more than 6 recovery? that seems fair

  • Nudu May 3, 2018 at 6:35 pm

    Thanks for this!

  • Zachary Tsai May 3, 2018 at 6:35 pm

    Does mobility affect the distance Blink travels?

  • Redar May 3, 2018 at 6:35 pm

    ummm what's was the resilience stat when your testing recovery? cause recovery time could be different if your maximum health is low or high, right?

  • Holden McKroin May 3, 2018 at 6:35 pm

    Does mobility effect ADS strafe speed?

  • René Fischer May 3, 2018 at 6:35 pm

    Thx a lot

  • Forg Gaming May 3, 2018 at 6:35 pm

    Thank you for being concise and not padding your video with nonsense yelling and other bullshit. Straight to the point, informative and well done. Please keep it up.

  • Pedro Mesa May 3, 2018 at 6:35 pm

    you get a like for that 80 trillion likes comment

  • eksentrysyti May 3, 2018 at 6:35 pm

    This video was exactly what I was looking for. Thanks for the comparisons, super useful.

  • WarBird May 3, 2018 at 6:35 pm

    Subbed befofe watched √

  • Red May 3, 2018 at 6:35 pm

    so helpful

  • AIENKEI May 3, 2018 at 6:35 pm

    Great video.

  • Bridgeboy69 May 3, 2018 at 6:35 pm

    Recovery FTW!

  • AyJay May 3, 2018 at 6:35 pm

    Mobility really should buff your sprint speed and jump distance. It would give hunters more use that they desperately need

  • Korner Curt May 3, 2018 at 6:35 pm

    Guys, very importand he is only half correct! Recovery effectivness is highest on Warlock, where as a Hunter does!!! sprint faster with mobility and for the Titan its resilience. Our clan just tested it with all 3 classes.

  • Aylwon Karlan May 3, 2018 at 6:35 pm

    44.4 + 29.4 rounded down = +1 Subscriber ! Great Theorycrafting Vid. Thx ;o)

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