Data Clinic Case Study

Recovery of data from 6th Generation HP ML370 Server

HP Proliant ML370

Job

Recovery and reconstruction of files and folders including several SQL databases from a failed HP ML370 series generation 6 RAID server.

Server Details

14 Disk HP Proliant ML370, Generation 6
The server was split in an 8 disk RAID 6, 4 disk RAID 5 and a two disk RAID 1.
Client location was Glasgow, Scotland. Data privacy issues required the recovery to be completed onsite.

The Fault

After an unknown problem, the client’s server had entered a rebuild, which had failed. Rebooting the server resulted in a blue screen and a loss of RAID configuration information.

All data on the RAID was now inaccessible with no data volumes being shown. It was also unknown how far through the rebuild the RAID had got before the rebuild had failed, so there may have been data corruption issues too

Other Notes

The data on this server was critical to the day to day running of the business, which was now at a stand still since the server failure. This was therefore an emergency job, completed overnight and onsite at the client’s central Glasgow location.

Background

The Hewlett Packard Proliant ML370 server is a very common RAID enabled fileserver that has gone through many generations as it’s evolved. Well known for it’s high quality of build, it has many excellent features and can be greatly expanded to accommodate extra features such as additional hard drives and RAM.
ML370 hard drive

The Recovery and Restoration

Analysis of the ML370 showed that it was running an 8 disk RAID 6, 4 disk RAID 5 and a 2 disk RAID 1. The RAID 1 was not really important to the client as it only contained the Operating System and could therefore be easily replaced. Both the RAID 6 and RAID 5 contained important data which needed to be recovered and once the disks has been analysed, repaired where necessary and cloned, the config information for both the RAID 6 and RAID 5 was determined. Virtual RAIDs were created in software and access the to data achieved.
Although the server had failed in its automatic rebuild process and fallen over within minutes, some data had rebuilt which had obviously resulted in some data corruption. It soon became apparent that two SQL databases had been corrupted quite severely and were now unusable. Using a technique similar to SQL injections, we were able to reintroduce the correct data over the top of the corrupted data in most cases. We were then able to repair the SQL databases and bring the whole server back online.

Time Taken

Two Data Clinic staff working onsite overnight. 16 hours.

Links

Learn more about Data Clinic’s RAID data recovery services here: http://www.dataclinic.co.uk/hard-disk-raid-recovery/
Data Clinic’s HP Recovery Page: http://www.dataclinic.co.uk/hp-raid-data-recovery-services/
Learn more about Data Clinic’s RAID and Server support contracts here: http://www.dataclinic.co.uk/raid-and-server-support-services-2/
Data Clinic’s Scotland office is located in Glasgow: http://www.dataclinic.co.uk/data-recovery-glasgow/

Stewart Whitworth

12:42 28 Jun 22

Whilst Data Clinic were not able to retrieve the data from 1 of the 3 drives I sent to them - they were very easy to work with, accomodated my requests allowing for a very flexible recovery process (I dropped off the drives in person and provided an obscure drive type for the recovered data which they were perfectly happy with). When I asked why the last drive was unrecoverable, they explained with lots of detail, and of course I was not charged for said drive.I've learnt my lesson and hopefully won't ever need a recovery service again, but if I do I know who to go to!

Brian Greco

13:38 09 Jun 22

3 years of my lifes' work and photos saved because of the amazing professionals at this company. My iPhone XS Max got stuck in a "boot loop" with a nearly full 512GB of storage. Most of the internet said there was no hope for this Error 14/1110: but Michelle, Elliot, and the team at Data Clinic said otherwise. Amazing friendly personable customer coordination from Michelle including arrangement of emergency service for which I flew into Manchester to the main lab. Elliot was patient, capable, and helped get the job DONE! I now have my phone not only backed up to an SSD for the data itself, but my phone is working as it was, and has updated software to the newest iOS. I cannot express my gratitude enough for the capable professionals who I was able to trust here at Data Clinic. I truly believe this is the best tech service I have ever experienced. Worth every penny and grateful for the invaluable benefit of my memories being restored. THANK YOU! Brian from USA based in Turkey

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