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HELP!!! Destroyed a pool!!!

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george73
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HELP!!! Destroyed a pool!!!

#1

Post by george73 » 13 Jul 2019 17:03

Please, please help me.
I destroyed my pool that contained very very important data and only some of them were backed-up! Than I created a new pool with the same parameters as the old one, except the old one contained a cache device and the new one do not. Now my pool is empty. All the data gone!

Is there any way now to claim back my data that were on the old pool?????

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apollo567
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Re: HELP!!! Destroyed a pool!!!

#2

Post by apollo567 » 13 Jul 2019 17:41

I fear you have lost. Creating a new pool over an existing one destroys all organisational pool data of ZFS, as far as I know.
my NAS and its development until today: viewtopic.php?f=63&t=39&sid=039fed830cf ... 4d0abe4a04

george73
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Re: HELP!!! Destroyed a pool!!!

#3

Post by george73 » 14 Jul 2019 09:52

And what about some file recovery software? Is there anything you may recommend like UFS Explorer Professional or UFS Explorer Raid recovery? Or maybe some free software?
Come on... I don't believe not existing anything that can be used in these situations in 2019.

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raulfg3
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Re: HELP!!! Destroyed a pool!!!

#4

Post by raulfg3 » 14 Jul 2019 10:16

No, sorry , no recovery tools for a user destroyer pool.
12.0.0.4 (revision 6766)+OBI on SUPERMICRO X8SIL-F 8GB of ECC RAM, 12x3TB disk in 3 vdev in RaidZ1 = 32TB Raw size only 22TB usable

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testmaster
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Re: HELP!!! Destroyed a pool!!!

#5

Post by testmaster » 15 Jul 2019 13:31

How did you destroyed your pool?
- Only over the function destroy pool (zpool destroy)
-> If so, and you don't have used your HDD's since then for another pool or another data, you can try to import it with "zpool import -D"

You may also try:
zpool import -FX pool-name
(X Option isn't documated, but as far as I understand this: It's like an "ultimate" search for an uberblock)

But this functions only availabe, when you don't have touched your "old" HDD's that you have used within your destroyed pool.
If you have used those for an new pool, or another data-storage, then you have lost all your data

george73
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Re: HELP!!! Destroyed a pool!!!

#6

Post by george73 » 15 Jul 2019 17:26

Hi testmaster!

I destroyed my pool because I was very foolish. Yeah... I thought if the "zpool destroy" is so destructive like it is, than it will bring up some warning message before it do its job... and it did not, so the pool destroyed. Than I thought, if I create the same pool, it will bring back my data... It did not, so the things happened in "chain reaction" and within a few seconds or minutes, I even forget to think about the destructiveness of these functions.
After, when I relaxed a bit and realized my un-backuped data gone I tried to search the net for some restore possibilities.
I tried the "zpool import -D" but it did not give me anything.
So I searched again the net for some data recovery software options and found some with ZFS support! But unfortunately almost every software of these types are very expensive. Some of my un-backuped data was on an old notebook hdd, but I must run a recovery operation on this too because it was reformatted in the meantime - luckily it was an NTFS partition and I managed to recover a good part of my lost data. But there were more on the destroyed pool, so I continued to hunt for some ZFS recovery and found one called file scavenger. It promises ZFS and raid support too and it is the cheapest one I can find - about 60USD!
Now I am running this on my ZFS drives in "demo" mode - it will not recover larger files, but will show me if it can. It is running now and searching for files - and yes, it is definitely have ZFS and raid support! If it can recover some of my lost data, I will buy this, because it looks promising.
Tomorrow I can tell you about that more, if interested.

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Re: HELP!!! Destroyed a pool!!!

#7

Post by trivium » 13 Aug 2019 14:04

Hi geoege73!

Look at this video https://www.youtube.com/watch?v=j_vl8cC1jkY
At this video, UFS Explorer Professional is used to recover data from RAIDZ. Try this software, maybe it will find the lost data. If the program is expensive, maybe a company that restores data will help you to recover data cheaper.

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Re: HELP!!! Destroyed a pool!!!

#8

Post by sleid » 13 Aug 2019 20:57

zpool import -Df name_of_pool
12.0.0.4 - Reticulus (revision 6939)
FreeBSD 12.0-RELEASE-p10 #0 r353327M: Tue Oct 8 23:48:39 CEST 2019
X64-embedded sur Intel(R) Atom(TM) CPU C2750 @ 2.40GHz Boot UEFI
ASRock C2750D4I 2 X 8GB DDR3 ECC
Pool of 2 vdev Raidz1: 3 x WDC WD40EFRX + 3 x WDC WD30EZRX

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