Forum Thread

Deleted RAID 1 Volume - Need Data

redpoint5 3,909 692 December 17, 2015 at 06:45 PM
I created a RAID 1 volume using 2x 2 TB drives in Windows 7. After running out of space, I purchased a 5 TB drive, removed 1 of the RAID drives, and replaced it with the 5 TB. The 5 TB drive was assigned a new drive letter, and I performed a file copy from the 2 TB drive to the 5 TB.

Next, I popped the remaining 2 TB drive out, leaving only the 5 TB drive. I verified all files were accessible on the 5 TB drive and copied even more data to it. Later, I went to access the data, but most of it was inaccessible. Then I rebooted the PC, and the 5 TB drive was completely inaccessible and I received a message that I must format the drive to use it.

Thinking that perhaps Windows didn't like the new drive utilizing the same logical drive letter as my previous RAID volume, I used Disk Manager to delete both missing drives using the Delete Volume option.

The 5 TB drive still shows as an unformatted disk. Inserting either of the 2 TB drives also shows as a "Foriegn" disk. Placing them in a USB cradle and connecting to a different PC also shows as an unformatted disk.

What gives? I thought I could take a drive out of a Windows RAID 1 configuration and access the data as if it were a single disk. These were not encrypted, and the drives were not physically connected when I selected Delete Volume, so the data on them cannot have been altered.

How do I get the data back? Preferably on the 5 TB drive, but I'd settle for the 2 TB RAID if that's much easier. What can explain how I lost access to the data on the 5 TB drive when I made no changes?

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#2
Quote from redpoint5 View Post :
I created a RAID 1 volume using 2x 2 TB drives in Windows 7. After running out of space, I purchased a 5 TB drive, removed 1 of the RAID drives, and replaced it with the 5 TB. The 5 TB drive was assigned a new drive letter, and I performed a file copy from the 2 TB drive to the 5 TB.
I can't explain exactly what happened but IMHO instead of removing 1 of the 2TB drives and installing the 5TB drive using the same cabling, I think you should have installed the 5TB drive as the 3rd drive in this PC and then copy the contents of the raid to the 5TB drive. If you can't or won't use a backup/recovery program, I would recommend that you take a look at TeraCopy [codesector.com]

Spinrite [grc.com] can and will under normal circumstances recover raid arrays of all types. You will need to install the original raid drives in their original order [drive0 - drive1] and boot to Spinrite & follow the instructions given. Do not stop Spinrite mid scan without writing down its percentage of progress.

Spinrite costs $89.00 but if it does not recover your raid array you would simply ask for a refund and you will get it, no questions asked.

I would recommend that next time you use a quality backup program/service instead of Windows File Copy.
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#3
foreign disk is not a problem, just choose import foreign disk, if only one disk, you can break the RAID, data still there.

the 5TB maybe simply because the drive is going bad, look at the SMART info with Crystaldiskinfo or SpeedFan, i won't fix when has warranty, otherwise i will just isolate the bad
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Last edited by Left4Deal December 19, 2015 at 08:48 PM
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#4
r-studio should be able to recover the files and you can download it free to see what it can recover.
http://www.r-studio.com/

last resort but it will recover the files.
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#5
Quote from komondor View Post :
r-studio should be able to recover the files and you can download it free to see what it can recover.
http://www.r-studio.com/

last resort but it will recover the files.
Same-o, Same-o. Roll Eyes (Sarcastic) Not free if you actually want to recover files. 2nd PC required to host the drive you want to work on.
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#6
Quote from dale_101798 View Post :
Same-o, Same-o. Roll Eyes (Sarcastic) Not free if you actually want to recover files. 2nd PC required to host the drive you want to work on.
Same ol, as opposed to your recommendation for spinrite?shake head
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#7
Quote from fenderman View Post :
Same ol, as opposed to your recommendation for spinrite?shake head
Yes Spinrite has never failed me, I'm a believer.Stick Out Tongue Same-o = costs money.nod
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#8
spinrite is to repair drives with issues not to recover lost data it is 50.00 well spent I had a co-worker delete and reformat a raid 5 array I was able to rebuild it with r-studio.

I also have a copy of spinrite too for failing drives.

Both paid for by me
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#9
Quote from komondor View Post :
spinrite is to repair drives with issues not to recover lost data it is 50.00 well spent I had a co-worker delete and reformat a raid 5 array I was able to rebuild it with r-studio.

I also have a copy of spinrite too for failing drives.

Both paid for by me
I'm sorry but you are incorrect regarding Spinrite and recovering files. Spinrite will attempt to recover ANY errors it finds and in the process it will more than likely restore the digital data too.

$50.00 means (I think) you have Spinrite V5, you are entitled to Spinrite V6 & V6.1 upgrades for free.
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#10
Quote from redpoint5 View Post :
How do I get the data back? Preferably on the 5 TB drive, but I'd settle for the 2 TB RAID if that's much easier. What can explain how I lost access to the data on the 5 TB drive when I made no changes?
Quote from Left4Deal View Post :
foreign disk is not a problem, just choose import foreign disk, if only one disk, you can break the RAID, data still there.

the 5TB maybe simply because the drive is going bad, look at the SMART info with Crystaldiskinfo or SpeedFan, i won't fix when has warranty, otherwise i will just isolate the bad
I just want to make sure this response doesn't as this thread devolves into another argument about spinrite Smilie

If you haven't touched the 2gb drives, the data is still there. You don't need a recovery tool, you just need to import the volume as mentioned in the response above.

I also agree with the above posters that you should cut your losses on the 5TB drive and return it while you still can. If a drive eats your data once, it's going to do it again.
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#11
Thank you for the responses.

What I didn't tell you is that I had a backup of most of the data on a 2nd 5 TB drive that I had purchased, but it was in another city. The rest of the data wasn't very important to me, but if there was a quick and easy way to recover, I wanted to explore that option.

I'm going to use Beyond Compare to clone the data I do have, and then I'll use Bittorrent Sync to keep the drives up to date over the internet. Basically, I'm creating my own redundant cloud instead of paying a maintenance fee to a company to store my data.

Let me know if there is something better than Bittorrent Sync. I haven't looked into what's out there in a while. I just didn't want to continue doing RAID 1 because everything would be lost if my PC were stolen or a fire destroyed the house.

Hmmm, I wonder how much a used LTO4 tape drive costs...

EDIT: Nevermind, I'm better off hot-docking a regular HD for backups.
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Last edited by redpoint5 December 20, 2015 at 05:25 PM
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#12
Quote from redpoint5 View Post :
Thank you for the responses.

What I didn't tell you is that I had a backup of most of the data on a 2nd 5 TB drive that I had purchased, but it was in another city. The rest of the data wasn't very important to me, but if there was a quick and easy way to recover, I wanted to explore that option.

I'm going to use Beyond Compare to clone the data I do have, and then I'll use Bittorrent Sync to keep the drives up to date over the internet. Basically, I'm creating my own redundant cloud instead of paying a maintenance fee to a company to store my data.

Let me know if there is something better than Bittorrent Sync. I haven't looked into what's out there in a while. I just didn't want to continue doing RAID 1 because everything would be lost if my PC were stolen or a fire destroyed the house.

Hmmm, I wonder how much a used LTO4 tape drive costs...

EDIT: Nevermind, I'm better off hot-docking a regular HD for backups.
Bittorrent Sync doesn't say what it uses to do incremental backups, I assume rsync. Also it seems to only be useful for distributed backups, i.e., if you have 3+ backup locations that can then start sharing data with each other as they receive it from the main host. That then makes me wonder why you just don't use rsync via cwrsync and the windows task scheduler.

ZFS has the capability to send snapshots to remote servers and is supposedly a lot more bandwidth efficient than rsync. However, this would require a significant change to your setup, so probably not an easy nor cheap solution for you. I'm hesitant to mention it at all, but it's worth a good read if you are interested in the subject.
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#13
Bittorrent Sync uses the BitTorrent protocol to do the hashing and file transferring. It has the advantage of being free, easy, and I'm already familiar with it.

What I really want is a cheap (free) software solution that does 1-way file transfers between computers connected via WAN. I'm most afraid of malicious code that could delete a file on one PC, and that change be replicated to the other PC. I'm similarly concerned about malicious programs that encrypt files such as Cryptowall. That virus has hit my company many times and caused a lot of wasted time restoring files from tape backup.

Using Bittorrent Sync seems to protect me against structural disaster and theft, but not against malicious code. Since I'm not familiar with Rsync, I'm not sure how much control there is over restricting deletions or encryption.

If I could setup the sync interval to something like a week, at least then I would likely have time to break the sync if I find my files have been maliciously attacked. Another solution would be to have someone periodically connect the remote storage device so that it isn't always available for sync.

Ideas?
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#14
Quote from redpoint5 View Post :
Bittorrent Sync uses the BitTorrent protocol to do the hashing and file transferring. It has the advantage of being free, easy, and I'm already familiar with it.

What I really want is a cheap (free) software solution that does 1-way file transfers between computers connected via WAN. I'm most afraid of malicious code that could delete a file on one PC, and that change be replicated to the other PC. I'm similarly concerned about malicious programs that encrypt files such as Cryptowall. That virus has hit my company many times and caused a lot of wasted time restoring files from tape backup.

Using Bittorrent Sync seems to protect me against structural disaster and theft, but not against malicious code. Since I'm not familiar with Rsync, I'm not sure how much control there is over restricting deletions or encryption.

If I could setup the sync interval to something like a week, at least then I would likely have time to break the sync if I find my files have been maliciously attacked. Another solution would be to have someone periodically connect the remote storage device so that it isn't always available for sync.

Ideas?
Rsync is generally used on unix/linux systems.
https://en.wikipedia.org/wiki/Rsync

Your schedule in this case would be based on the windows task scheduler, so you could setup any interval. There's also apparently a way to do snapshots with rsync, so that could help with data destruction issues.

If you want a gui, these might or might not work for you...
https://acrosync.com/home.html
http://www.aboutmyip.com/AboutMyX...taCopy.jsp
http://web.synametrics.com/Syncrify.htm
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#15
Quote from redpoint5 View Post :
If I could setup the sync interval to something like a week, at least then I would likely have time to break the sync if I find my files have been maliciously attacked. Another solution would be to have someone periodically connect the remote storage device so that it isn't always available for sync.

Ideas?
I used to do the periodic sync thing using a unix tool called dd. It works at a block level so the file-system doesn't need to be mounted. At worst I'd be a day behind.

Since then I just sync my important stuff to a couple of cloud services.
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