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 Post subject: Help with NAS disaster
PostPosted: December 24th, 2015, 14:34 
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Joined: December 24th, 2015, 14:18
Posts: 4
Location: Spain
Hello,

We are very worried about a very probably data lost. We have a NAS emc celerra NS20 (old). The NAS is configured with 6 raid 5 groups. One of this raid arrays become faulted and some folders cant be read now.
This raid 5 array has 2 disks faulted (very bad, i know). One of these was faulted since 2013, the other since yesterday. So, i think the only way to bring data back is recovering the data of this last faulted disk. Is this right?
We bring this disk to a recovery data service and said us that surface is scratched and data is unrecoverable. I'll attach an image of the surface in 5 minutes so you can give me your opinion.
I know that 100% of data is impossible to recover, but maybe we can get an image with bad sectors included, mount this image in a good condition disk and recover the array (with errors and corrupted data of course).
The problem is i dont understand completely the data structure over this array. I know that two luns was assigned to this raid and are offline. dont know if we can bring this luns online with errors, or maybe one of two. i really appreciate some light with this.

Thanks.


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 Post subject: Re: Help with NAS disaster
PostPosted: December 24th, 2015, 14:36 
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Joined: December 24th, 2015, 14:18
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Location: Spain
Last disk faulted surface.


Attachments:
IMG-20151224-WA0006.jpg
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 Post subject: Re: Help with NAS disaster
PostPosted: December 28th, 2015, 10:37 
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Joined: April 22nd, 2015, 20:32
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Platter has some decent damage in there, how much were you willing to spend on that recovery process ?

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 Post subject: Re: Help with NAS disaster
PostPosted: December 29th, 2015, 5:21 
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Joined: December 24th, 2015, 14:18
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DRUG wrote:
Platter has some decent damage in there, how much were you willing to spend on that recovery process ?


The data stored in there is quite important. First of all i would like to know if its possible to recover some data. Some expert said me that all data is unrecoverable because head will be damaged when try to read damaged surface. Is that true?

Thanks.


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 Post subject: Re: Help with NAS disaster
PostPosted: December 29th, 2015, 5:35 
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Joined: December 8th, 2013, 4:48
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Location: Pakistan
borjacc wrote:
DRUG wrote:
Platter has some decent damage in there, how much were you willing to spend on that recovery process ?


The data stored in there is quite important. First of all i would like to know if its possible to recover some data. Some expert said me that all data is unrecoverable because head will be damaged when try to read damaged surface. Is that true?

Thanks.


yes, this is true every time head hit the damage area it will be gone.

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 Post subject: Re: Help with EMC NAS recovery
PostPosted: December 29th, 2015, 8:11 
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Joined: February 8th, 2014, 8:08
Posts: 446
Location: Eastern Europe /recovering worldwide/
borjacc wrote:
We have a NAS emc celerra NS20 (old)...
We bring this disk to a recovery data service and said us that surface is scratched and data is unrecoverable.

What's the drive model?
To me it looks like FC or SAS. If so, then chances are slim to none.

If necessary, I can help with remote recovery from this EMC NAS using the image of the drive failed in 2013, but you can guess the quality of results.


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 Post subject: Re: Help with EMC NAS recovery
PostPosted: December 29th, 2015, 10:00 
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Joined: December 24th, 2015, 14:18
Posts: 4
Location: Spain
Dmitri wrote:
borjacc wrote:
We have a NAS emc celerra NS20 (old)...
We bring this disk to a recovery data service and said us that surface is scratched and data is unrecoverable.

What's the drive model?
To me it looks like FC or SAS. If so, then chances are slim to none.

If necessary, I can help with remote recovery from this EMC NAS using the image of the drive failed in 2013, but you can guess the quality of results.


The drive is Seagate cheetah fc from 2008 with sca 40 pins.
Do you have experience with emc nas?


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 Post subject: Re: Help with EMC NAS recovery
PostPosted: December 30th, 2015, 12:45 
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Joined: February 8th, 2014, 8:08
Posts: 446
Location: Eastern Europe /recovering worldwide/
borjacc wrote:
The drive is Seagate cheetah fc from 2008 with sca 40 pins.
Then it's a death sentence, unfortunately.
Also, if other drives were purchased at the same time with this one, I'd recommend to consider them unreliable. There's a non-zero chance they may fail the same way, as the drive on photo.

borjacc wrote:
Do you have experience with emc nas?
Yes, and quite extensive one, despite all the acquisitions EMC made previously.
Please check your PM.


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 Post subject: Re: Help with EMC NAS recovery
PostPosted: December 31st, 2015, 14:30 
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Joined: August 15th, 2006, 3:01
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Location: CDRLabs @ Chandigarh [ India ]
borjacc wrote:
Dmitri wrote:
borjacc wrote:
We have a NAS emc celerra NS20 (old)...
We bring this disk to a recovery data service and said us that surface is scratched and data is unrecoverable.

What's the drive model?
To me it looks like FC or SAS. If so, then chances are slim to none.

If necessary, I can help with remote recovery from this EMC NAS using the image of the drive failed in 2013, but you can guess the quality of results.


The drive is Seagate cheetah fc from 2008 with sca 40 pins.
Do you have experience with emc nas?


Sir ,
You Are Talking About One Of the Best RAID/NAs Experts in The World

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CDRLabs Data Recovery - [ Chandigarh ,India ]
My Data Recovery Experiments - > https://www.facebook.com/chandigarhdatarecovery


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 Post subject: Re: Help with NAS disaster
PostPosted: December 31st, 2015, 14:32 
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Joined: August 15th, 2006, 3:01
Posts: 2294
Location: CDRLabs @ Chandigarh [ India ]
borjacc wrote:
Last disk faulted surface.


Well,
0 to 5 Heads Can Definately Be Imaged Leaving The Last Top Head [ Assuming its The Only One Defective ] .But It Would Be a Task To Clean Wipe All Other Platters due to Top Platter Debris Scattered All Across .

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Amarbir S Dhillon
CDRLabs Data Recovery - [ Chandigarh ,India ]
My Data Recovery Experiments - > https://www.facebook.com/chandigarhdatarecovery


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 Post subject: Re: Help with NAS disaster
PostPosted: December 31st, 2015, 18:18 
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Joined: January 29th, 2009, 11:23
Posts: 180
Location: SXSW
Amarbir wrote:
borjacc wrote:
Last disk faulted surface.


Well,
0 to 5 Heads Can Definately Be Imaged Leaving The Last Top Head [ Assuming its The Only One Defective ] .But It Would Be a Task To Clean Wipe All Other Platters due to Top Platter Debris Scattered All Across .



I don't agree with this at all! and FC with media damage and do selective cloning?!?!?! it's no going to happen, if the top surface has that damage, for sure the other surfaces are fubar IMHO


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 Post subject: Re: Help with NAS disaster
PostPosted: January 5th, 2016, 6:58 
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Joined: January 28th, 2009, 10:54
Posts: 2636
Location: Greece
hdd_sand wrote:
Amarbir wrote:
borjacc wrote:
Last disk faulted surface.


Well,
0 to 5 Heads Can Definately Be Imaged Leaving The Last Top Head [ Assuming its The Only One Defective ] .But It Would Be a Task To Clean Wipe All Other Platters due to Top Platter Debris Scattered All Across .



I don't agree with this at all! and FC with media damage and do selective cloning?!?!?! it's no going to happen, if the top surface has that damage, for sure the other surfaces are fubar IMHO


I also agree that I don't agree with this. Sorry Amarbir.

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