Raid Recovery

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Raid Recovery

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In 99.9% of cases we successfully recover your data; if we can’t however there is no charge to you.

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We provide our data recovery services to a variety of businesses, organisations and home PC users.

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Commonly Experienced Raid Server Issues:

When considering the problems faced by RAID server users when it comes to hard drives it is first necessary to take into consideration the amount of traffic that passes through a RAID server. Whereas some users may be individuals are home using their RAID setup for the storing and streaming of multimedia files so many companies have multiple users permanently accessing the mirrored data on their RAID drives to run CRM databases and large accounting packages. With this in mind if a problem occurs then not only are the workforce losing time and productivity but potentially important data may be lost if the mirroring process. RAID drives can fail because of hardware problems especially if they experience heavy traffic on a daily basis but also can suffer problems with firmware. Here at we are experts when it comes to RAID failures and can help you rebuild your RAID array as well as recover any data that may not have been saved correctly during the mirroring process.

RAID Hard Drive Mechanical Failings:

If you consider the problems that a single hard drive might encounter then you should consider multiplying this by the number of hard drives in your array. As some arrays can sport up to eight hard drives then there is scope for a great number of errors to occur although not necessarily at the same time. Having said that however it has been known for one drive to fail and have a knock on effect to another drive if too much of a load has been brought to bear on it unexpectedly. When it comes to RAID drives among the common problems faced are failing components within the drives because of over work. These drives are designed to be work horses and serve their purpose well but occasionally a drive will have a weakness in a component that will render it unusable and the data unreadable even to the other drives that are designed to mirror it; this is where we at come in

RAID Rebuild Unsuccessful – Why?:

Most companies that operate a RAID setup have IT personnel who can rebuild the system should it require it. A rebuild will normally be required if one or more drives have failed and need to be replaced; more so if the RAID array itself has no ‘hot swap’ facility. ‘Hot swapping’ is a more recent addition to RAID arrays and allows for the replacement of a faulty drive whilst the array is still in operation and use by those attached to it across a network. And for those setups that do not have a ‘hot swap’ function then the RAID server needs to be powered down correctly; one drive at a time and then rebuilt. Herein problems can occur as a rebuild may not always be successful through no fault of the personnel working on it. With over 15 years experience with RAID and Network Assisted Storage can help you rebuild your RAID array and recover any data that may not have been mirrored correctly in the process

RAID Electronic or Firmware Failures:

RAID drives have the same electronic circuitry and firmware attached to them as an ordinary drive used in a single user PC. With this in mind the same kind of problems can arise and as such you should be aware that problems befalling a single user hard drive may well occur without your knowledge or without warning. Sudden surges of electricity can render one or more disks unreadable and unusable or can corrupt the firmware contained on the platters of the individual drives. If one or more of your RAID drives ceases to function then you should contact us for advice on how to recover the data if no up to date mirror has been created across the other drives in the array

My RAID Controller Card Isn’t Working:

To calculate the parity of the chipsets between drives and the amount of data that is moved at a time older RAID arrays have a separate setup on a computer which sends this information via a controller card to the RAID array. RAID controller cards contain their own firmware and also a whole host of delicate capacitor and chip technology that can develop a fault for any number of reasons. Should the controller card develop a fault users on your network may find that they cannot send or receive information from the array and likewise the array may not be able to produce an accurate mirror of the data across all of its drives. Contact us at if this is a problem you are experiencing and find out how we can help with the replacement of a faulty controller card as well as retrieving an accurate backup of your data

Featured Article

RAID Server Repair


I have a set of four Samsung hard drives in a RAID array. These are connected through a home server, I am not sure of the make. These drives seemed to be ok until I performed my weekly power-down of the system, to keep it cool during the weekend. Since that power-down, I have noticed that the drives are not starting up when I turn on the server or the computer. I can turn on my PC, and the drives slowly start spinning, each one in turn like a Mexican wave. It seems almost as though they are being reset by the server, or that power is not going to each drive at the same time. While the drives seem to be fine, I have noticed that they are not completely readable, and that already some data which should be on the server appears to have gone. One of the drives is being reported as failed, but I don’t know which one of the drives this is.


I have an HP server which uses a RAID array system. I recently had to so a firmware upgrade to the server, and the computer recommended that I also do a similar upgrade on my RAID array. There are 5 drives in the system, which are running on a firmware HPD3. I was told that I should upgrade them to the latest HPD7 firmware, and I did this. However, when I tried to run the upgrade, I was told that the firmware could not be upgraded to 7, and so I decided that HPD4 would have to be the next step. The upgrade was completed, but when I tried to view the drives after the upgrade, I could see that at least 2 of the drives are no longer working, and appear to be dead. I need to recover the data from these RAID drives, as they were not yet backed up when I did the upgrade. These drives are labelled as HPD3, which doesn’t seem good to me, and their capacity is set at 0. I have a lot more data on these drives.

Client Testimonials

“ If your hard disk goes bad, this is the place in London to turn to. ”

Barry White, Ealing, London

“ Two of our work business hard disks failed at the same time. Advanced Raid Recovery London was able to rescue 100% of data from both drives. ”

Jonny Rose, Greenwich, London

“ I would like to thank the recovery engineers who worked on my job. Being of professional graphic designer I felt much embarrassment to experience a hard drive failure without a backup. ”

Roger Black, Bromley, London

“ It is a small investment for your business related information to be recovered. ”

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