Accidentally formatted One of the Raid 0 HDD

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Vincent Lam

Accidentally formatted One of the Raid 0 HDD

Post by Vincent Lam » Tue Sep 20, 2016 1:44 pm

Hi All,

I have formatted One of the Raid 0 HDD accidentally with mac os x , it's 3Tb WD HDD and i'm so lost now all my working files(video footages) are here.
May i know how to start R-studio? Should scan the new formatted HDD or scan the Raid HDD(which show its failure)
Many thanks

Alt
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Re: Accidentally formatted One of the Raid 0 HDD

Post by Alt » Tue Sep 20, 2016 2:06 pm

When you destroyed data on one disk of a RAID0, you destroyed all data on the RAID0 irrecoverably. Sorry.

Data-Medics
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Re: Accidentally formatted One of the Raid 0 HDD

Post by Data-Medics » Tue Sep 20, 2016 3:46 pm

Was it just a quick format, or did you long/secure format it?

Reason I ask is that if it were just a quick format, it may be possible to still recover the bulk of the video files. File names & folder structure will almost certainly all be lost though.

Vincent Lam

Re: Accidentally formatted One of the Raid 0 HDD

Post by Vincent Lam » Tue Sep 20, 2016 9:48 pm

i used Disk Utility formatted with OS X(Journaled), is it a quick format?
I hope i can recover it at least 70%. many thanks

Corsari
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Re: Accidentally formatted One of the Raid 0 HDD

Post by Corsari » Wed Sep 21, 2016 12:35 am

Hi Vincent

You'd better reply to the friend Data Medics user' question, since quick format against full format makes two totally different epilogues.

Your hdd is 3TB. Did the format process took just few instants/seconds (quick initialization)? Or it lasted some three / four hours (full format)?

After the formatting/initialization, have you written something in that drive?
Robert
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Vincent

Re: Accidentally formatted One of the Raid 0 HDD

Post by Vincent » Wed Sep 21, 2016 12:46 am

It took about a seconds to format, after that i did not write anything on it
many thanks
Corsari wrote:Hi Vincent

You'd better reply to the friend Data Medics user' question, since quick format against full format makes two totally different epilogues.

Your hdd is 3TB. Did the format process took just few instants/seconds (quick initialization)? Or it lasted some three / four hours (full format)?

After the formatting/initialization, have you written something in that drive?

Alt
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Re: Accidentally formatted One of the Raid 0 HDD

Post by Alt » Wed Sep 21, 2016 8:35 am

I think it will be possible to recover un-fragmented files by searching for known file types (raw file recovery).

Corsari
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Re: Accidentally formatted One of the Raid 0 HDD

Post by Corsari » Wed Sep 21, 2016 8:48 am

Well
The premises tell that if properly reconstructed, it could even return the filesystem structure.

It is matter of find parameters and run the scan.

Was that HFS+ formatted that RAID 0?
Robert
Technical Manager @ Recupero Dati RAID FAsTec (Italy)

USEFUL RULES and GUIDELINES
1) What to check BEFORE begin a disk image/clone process [link]
2) Disks that are too slow while imaging/cloning them [link]
3) All my posts on this forum [link]

Alt
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Re: Accidentally formatted One of the Raid 0 HDD

Post by Alt » Wed Sep 21, 2016 10:48 am

If it's a software Apple RAID, this article might be of help: Default Parameters of Software Stripe Sets (RAID 0) in Mac OS X.

Data-Medics
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Re: Accidentally formatted One of the Raid 0 HDD

Post by Data-Medics » Wed Sep 21, 2016 1:42 pm

Corsari wrote:Well
The premises tell that if properly reconstructed, it could even return the filesystem structure.

It is matter of find parameters and run the scan.

Was that HFS+ formatted that RAID 0?
I doubt that filesystem will be recoverable, as the catalog file was most likely overwritten by the format. If not competely, it'd be at least partially overwritten. Even taking RAID out of the picture over-formatted HFS is a nightmare to get back any file names or folder structure. But, can still likely get back a good amount of data.

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