Accidentally formatted One of the Raid 0 HDD

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Re: Accidentally formatted One of the Raid 0 HDD

by Data-Medics » Wed Sep 28, 2016 1:20 pm

Corsari wrote:Mr. Vincent says he has formatted 1 drive

so he has not formatted the RAID 0 :-D so the catalog file has not been wiped off.

so theoretically it has been created an empty HFS+ filesystem on that single drive with really few LBAs overwritten by the process.

I'm optimistic.
I would hope you are right, but I'm not so optimistic. I'd say I'm more of a "realist". :D

Re: Accidentally formatted One of the Raid 0 HDD

by Corsari » Thu Sep 22, 2016 4:38 am

Mr. Vincent says he has formatted 1 drive

so he has not formatted the RAID 0 :-D so the catalog file has not been wiped off.

so theoretically it has been created an empty HFS+ filesystem on that single drive with really few LBAs overwritten by the process.

I'm optimistic.

Re: Accidentally formatted One of the Raid 0 HDD

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.

Re: Accidentally formatted One of the Raid 0 HDD

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.

Re: Accidentally formatted One of the Raid 0 HDD

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?

Re: Accidentally formatted One of the Raid 0 HDD

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).

Re: Accidentally formatted One of the Raid 0 HDD

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?

Re: Accidentally formatted One of the Raid 0 HDD

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?

Re: Accidentally formatted One of the Raid 0 HDD

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

Re: Accidentally formatted One of the Raid 0 HDD

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.

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