Drobo

Recovered Data from DroboPro is showing garbage

We have a drobo pro which has crashed. The chassis had failed but as we understand the data will be available on the hard disk. We removed the hard disk and ran R studio scan.
We are able to see the data but when we try to recover the data it is showing garbage. What could be the issue and possible resolution. We need to recover the data at any cost.

I am a little confused

have you put the disks into a second drobopro chassis?

if not then that is what you must do - you cannot just get the data back off the disks by hooking them up to a regular pc directly

the data on the disks is only readable by a drobopro* - if you get a second (functional) drobopro chassis and insert ALL the disks and power it on - then your data will be immediately available

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  • and some very expensive data recovery companies[hr]

Also - i hope that however you have tried to recover the data - it has not written anythign to the disks - otherwise you may have a big problem!

As people (including me) have said over and over - Drobopro protects against a disk failure, RAID is not a backup and should not be the only copy of crticial data

Hi:
Thank you for your quick reply.
We have inserted all hard-disks into another drobo chassis(same model Drobopro) but unfortunately we have got unallocated space. Which was unreadable.
We had created a single volume when we have configured drobo at first time and it has dual disk redundancy with NTFS file system.

We have inserted 6 hard-disk size of each HDD is 1TB.

Is there any way to recover the data from hard-disks?

If you just put the disks into a new drobopro, and have not re-initialised it, then it would appear that when your old drobo crashed it also corrupted the disks, otherwise it shoudl have just started up correctly.

There is nothing which you can do to recover the data by yourselves in this case.

If it really is “at any cost” then some data recovery services can work with drobos.

here one i found after a very quick google search: http://www.retrodata.co.uk/data-recovery-services/nas-data-recovery/drobo-data-recovery/

if you just put “drobo data recovery” into google then you should find some companies which may be able to help you - but data recovery can be very expensive.

let us know how you get on

If you just put the disks into a new drobopro, and have not re-initialised it, then it would appear that when your old drobo crashed it also corrupted the disks, otherwise it shoudl have just started up correctly.

There is nothing which you can do to recover the data by yourselves in this case.

If it really is “at any cost” then some data recovery services can work with drobos.

here one i found after a very quick google search: http://www.retrodata.co.uk/data-recovery-services/nas-data-recovery/drobo-data-recovery/

if you just put “drobo data recovery” into google then you should find some companies which may be able to help you - but data recovery can be very expensive.

let us know how you get on

If you just put the disks into a new drobopro, and have not re-initialised it, then it would appear that when your old drobo crashed it also corrupted the disks, otherwise it shoudl have just started up correctly.

There is nothing which you can do to recover the data by yourselves in this case.

If it really is “at any cost” then some data recovery services can work with drobos.

if you just put “drobo data recovery” into google then you should find some companies which may be able to help you - but data recovery can be very expensive.

let us know how you get on

Have you tried contacting the Drobo support and get some help reading the disk pack in the new Drobo Pro hardware? The method you’re most keen on - getting the raw data from the drives outside of the Drobo is the very last thing you should try, with the least chance of succeeding. None of the freely available software data recovery tools will understand the Drobo data structure.

retro data looks good, but they also point out:

In the event of any Drobo failure, please never allow someone without the relevant technical experience and expertise make any attempts at data recovery. This is the biggest cause (by some margin) that we see of totally unrecoverable data. If your Drobo has failed, and no-one has yet tried to recover the data, we can practically guarantee a 100% successful recovery – with a very quick turnaround.

Recovering Drobo Data Robotics Data
■Failed hard drive (solid or steady red LED light)
■Firmware upgrade failed or corrupt firmware
■Corrupt file system or corrupt RAID array (solid red drive LED light)
■RAID rebuild failed (Flashing red LED light)
■Overheating (red power light)
■Corrupt volume
■Corrupted RAID
■Deleted files

Emergency Drobo Recovery

If your data is mission-critical and is causing severe operational problems, we can usually start extracting data from your RAID array within one hour of having made secure backup clones with our emergency data recovery service

Failed Drobo Devices

Below are the failed Drobo devices we have experience of recovering. If you have suffered from a Drobo RAID failure, hard drive failure or any other issue that is preventing access to your data, we can help.
■Drobo ■Entry-level system.
■Blinking or flashing red LED light means a hard disk has failed, or is failing)

■Drobo S
■Drobo Pro ■Solid or steady red LED light means hard disk drive failure)

■Drobo Elite
■Drobo FS[hr]
interetsing, retrodata have the following warning on their website:

DROBO Failures

We are receiving more enquiries relating to failed DROBO storage units than all other NAS devices combined.

A typical involves multiple drive failure caused, we currently believe, by faulty electronics.

It is our opinion that if you currently have important data on any Drobo storage device, you ensure you have backups that have been verified.

Actually you have a point here. It is very difficult to understand drobo Raid data stracture.
In common Raid5 and Raid6 has a sequence but Drobo has a Beyond raid and it wont have have sequence in Harddisks.

Drobo wont support and disclose the raid level information they have to recover the data from harddisks. they asks for recovery services from them.

Do you have any idea of beyond raid technical structure and what would be the block size of sector? We were able to recover the file from harddisk but it’s corrupted or open in encrypted format.

It’s fairly “random”

Essentially it uses raid 5 (or 6) type parity on blocks of data, and (somewhere) maintains a table showing which groups of blocks go together

It’s why it’s fairly unrecoverable by end users and can only be read by drobo’s firmware or specialist data recovery firms (who I guess either have some kind of license with drobo or have worked out their own algorithms for deciphering the data structures drobo use

We have tried to recover the data using Raid5 and Raid6 recovery methods. but we are unable to get correct data. All data coming with garbage value.
What could be the best option to get correct data from harddisks.

as i have already said - convential recovery methods will not work!

drobo mixes up all of your data in a random way:

block 1 on disk 1 may be “paritied” with block 132 on Disk 2 and then result stored in block 837 on disk 5

you just cant tell!

the ONLY hope you have now is a professional data recovery service

anything else is just wasting your time - and depending on how you are attempting to recover the data - perhaps making it worse!!!

if you do not understand what you are doing, then you should STOP immeidately and give the disks to a specialist company to recover for you