Raid Recovery

Professional raid data recovery services

MJM Data Recovery Limited
GDPR Compliant

raid

raid

Raid server data recovery

Raid recovery services for all servers and raid systems. We can recover data from failed raid systems running under any raid level and operating system.

From failed server rebuilds, single or multiple drive failures, etc and in numerous instances we can recover where others fail, free diagnosis even on second opinions.

Please call us to find out more about our RAID Recovery Services

Network Attached Storage (NAS)
Rack Based Servers
Direct Attached Storage - DAS
Storage Area Network (SAN)
All other servers

Tower servers, Microserver recovery, USB based RAID storage, eSATA RAID storage systems.

Server data recovery

Stand-alone servers usually have drives built-in as part of the server. On tower servers, the RAID drive bays are either inside the box, or there are a number of bays that are accessible on the front of the server. Rack-mounted servers, like the one in the photo usually have the RAID drives mounted where the drives are easily accessible. In some cases, there may be a DAS connected containing other data drives.

We can recover from all RAID server systems, from new and old. From all hard drive types, including SCSI, SAS, SATA, SSD and almost every operating system. Windows server, Linux, UNIX, etc. RAID file systems such as NTFS, REFS, EXT, XFS, UFS, ZFS, etc. Contact us if there is any doubt.


NAS RAID data recovery

NAS RAID recovery from all NAS storage equipment. Single drives to multi-bay racked NAS enclosures. From every manufacturer and operating system. EXT, EXT2, EXT3, EXT4, XFS, ZFS, BeyondRAID and from Windows, LINUX, and MAC based NAS equipment.

NAS Data Recovery

NAS boxes connect using a network connection. Some have built-in Wi-Fi enabling easy connection to the device. Most of them come with built-in file-sharing, music, video and photo sharing servers that can connect to and be used on computers, mobile phones, smart TVs and most other connected equipment. Allowing you to watch videos or play music anywhere you want.


DAS RAID data recovery

RAID Recovery from DAS systems.  Direct Access Storage external enclosures containing several hard drives that are connected directly to the computer, using SAS, SCSI, eSATA. We regularly recover data from drives in DAS enclosures.

DAS Data Recovery

DAS enclosures contain a number of drives that can be configured as a RAID or JBOD on the host computer. They come in all sizes that use 2.5 inch SAS or 3.5 inch SAS, SCSI or SATA drives. Some of the more modern DAS enclonsures use PCIe based Solid State Drives (SSD).


SAN data recovery

Storage area network or SAN systems are highly complex and require the best engineers available to recover data. Having an in-depth understanding how the data is stored is vital before recovery can even commence. We can recover data from the most sophisticated systems including EMC, Equallogic, Netapp, Stornext, Centravision and Apple XSAN.


SAN Data Recovery

Storage Area Network (SAN) drive enclosures are usually found in top-end servers. Each SAN enclosure can be combined over the fiber or iSCSI network with other enclosures to form a Cluster.

These are all connected using Fiber Channel or iSCSI switches to the host server computer where the management of the SAN is configured and maintained. There can be several SAN clusters connected to the host.


RAID Recovery Process

Our RAID recovery processes are safe and use best practices. Our imaging systems for all types of hard drive, SATA/ATA, SCSI, SAS, etc all use multi-pass imaging techniques. So when we hit a bad sector, the drive will power off, then depending on the settings, it will skip a set number of sectors or skip a specific head and then continue with the cloning process.

On the second pass, the drive is read backwards and again areas are skipped on detection of a bad sector. There there are two further passes to attempt to over read the bad sectors, each with different settings for time-out, sectors to be read, what to do when specific errors are encountered, etc.

Once the cloning process is complete, we will have the best clone that is possible to be got from the hard drive and that no recovery work is made on your drives as we can work safely with the cloned drives.

Prior to cloning or imaging all our image drives are wiped prior to being used to give absolute certainty that there is no possibly of cross contamination of data. Meaning your data is totally safe with us.

The following image describes our process from receipt of the drives to the final data copy process.

RAID Recovery Process

Raid Recovery Service Levels

Our RAID recovery service levels start from a standard service which typically takes 7 days, A priority service takes up to 5 days and an emergency service where the data is worked on 24/7 until we get your critical data. These service levels will apply to arrays of less than 12 drives, because of the time it takes to clone larger numbers of drives. For larger arrays, a timescale will be advised in our quote.


RAID Recovery News

26th Sept 2021
Five drives in a RAID 5 configuration were sent to us after another company had diagnosed faults with two of the drives, one had 'bad sectors', the other a 'head fault'. We diagnosed all 5 drives and cloned the three good ones.

During our analysis of the drive with bad sectors, we found that the PCB had become covered in fine dust particles that were causing issues with the PCB. We copied the ROM content to a good PCB and the drive imaged without any issues or bad sectors.

The drive with the 'head fault'. We removed the heads, cleaned them and tested them on a known working hard drive. The heads were found to be fully working, and head resistance did not indicate any faults. We copied the ROM and removed the PCB and repeated the procedure as the drive with 'bad sectors' this drive also cloned perfectly.

The whole process, from receipt of the job to the customer receiving a file list, took 3 days, and we recovered 100% of the data. The previous company had spent weeks trying to clone just the drive with 'bad sectors'

This is another example where a company had attempted RAID recovery without a thorough diagnosis. The customer had almost accepted their word that the data was not recoverable, but was given our number by a contact who had used us before.

If you have had an 'Unrecoverable' RAID system, contact us before giving up totally. This customer did and got all their data back. We do not charge for diagnosis on RAID arrays with less than 4 TB of data, even on second opinions.

30th July 2020

Another SAN recovered. This one was a ZFS ZRaid2 consisting of 24 x 6 TB SAS hard disks. The customer had inadvertently erased dozens of pools of critical research data. They had tried rolling back, but this made the problem worse, as the system was still in use and had added about 1tb of new data. Once we cloned all the drives, we set about searching for the missing data. This was painstaking work that involved writing several programs and scripts to find the data.

The first attempt, recovered about 50% of the missing data, but this gave us insight into the areas that needed further analysis. Eventually, we managed to recover more than 96% of the missing data, and almost 100% of the critical data.

This was a time-consuming job, with two engineers and a programmer working in tandem to get the job done.

12th March 2019

Just completed a medium-sized SAN raid system for a customer with over 20 TB of data. The system was an HP SAN with 20 drives, from imaging each drive twice and sending the data back, total of 4 days.

Another happy customer.