cgsecurity.org

Good morning,

I am sorry to have to ask you and not be able to proceed alone, but my knowledge on the subject is few and I would not want to risk losing my fate completely.

I had a nas qnap in raid1, instead of unmounting the disks I unmounted the volumes (distracted).

test disk brings me the following report:

TestDisk 7.2-WIP, Data Recovery Utility, March 2021 Christophe GRENIER <grenier@cgsecurity.org> https://www.cgsecurity.org Disk /dev/sdb - 2000 GB / 1863 GiB - CHS 243201 255 63 Partition Start End Size in sectors >D Linux filesys. data 40 1060135 1060096
D Linux Raid 40 1060143 1060104 [9]
D Mac HFS 409640 3906766967 3906357328
D Linux Swap 1060288 1060303 16
D Linux Raid 1060296 2120527 1060232 [256]
D Linux filesys. data 40993672 3889234823 3848241152 [DataVol1]
D Linux filesys. data 3889240112 3890155567 915456
D Linux Raid 3889240112 3890157879 917768 [13]
D Linux Swap 3890300400 3890300415 16
D Linux Raid 3890300408 3904770687 14470280 [322]
Structure: Ok. Use Up/Down Arrow keys to select partition. Use Left/Right Arrow keys to CHANGE partition characteristics: P=Primary D=Deleted Keys A: add partition, L: load backup, T: change type, P: list files, Enter: to continue ext4 blocksize=4096 Large_file Sparse_SB Recover, 542 MB / 517 MiB

the files are readable and I'm trying to recover them with the "P" and "C" function, but after more than 24 hours of operation it only copied 400gb to 1.5tb: S

is it possible to recover ONLY the volume [datavol1]? all the data are present there

tomorrow I have to continue working and without data it is dramatic, I wish I could have a read-only volume to at least be able to copy the data I need if necessary.

Thanks for reading.

PEPO87 wrote: 21 Mar 2021, 10:02 is it possible to recover ONLY the volume [datavol1]? all the data are present there

As you have to select a partition/volume before listing and copying files you are automatically restricted to that volume. Therefore I don't understand the question.

tomorrow I have to continue working and without data it is dramatic, I wish I could have a read-only volume to at least be able to copy the data I need if necessary.

For urgent matters read no. 7 here:
viewtopic.php?f=5&t=10792

forgive me, I expressed myself badly, I absolutely do not want an urgent answer. I motivated only the two paths taken:

1) with the 1st hd I am making a data backup. and I don't need help with that

2) with the 2nd hd I would like to recover the volume and access it from an os such as linux qnap mac osx ... but I don't know how to do it, I assume that it is enough to set the volume to "P" and proceed with the execution. but I don't want
to lose the data (2n hd), so before making any other mistakes I would like to have a confirmation from you.

forgive me if I have expressed myself badly

If you want to play with the second hard disk, duplicate it and play with it.
You are acting as if your RAID1 contains two identical REGULAR drives.

I can't tell for sure as I don't use RAID arrays, but there might a kind of RAID header that contains information that this drive is supposed to be a RAID drive and there my be data to identify the other drives belonging to this RAID array.

Therefore it might be impossible to remove one RAID drive out of its set and run it separately. For other RAID configurations, such as RAID 5 this is obvious but as I said: I don't know. I am not aware of any general rule of the on drive layout of RAID configurations. They might be different between software RAIDs, hardware RAIDs and between different hardware RAID controller manufacturers.

recuperation wrote: 21 Mar 2021, 11:23 If you want to play with the second hard disk, duplicate it and play with it.
You are acting as if your RAID1 contains two identical REGULAR drives.

I can't tell for sure as I don't use RAID arrays, but there might a kind of RAID header that contains information that this drive is supposed to be a RAID drive and there my be data to identify the other drives belonging to this RAID array.

Therefore it might be impossible to remove one RAID drive out of its set and run it separately. For other RAID configurations, such as RAID 5 this is obvious but as I said: I don't know. I am not aware of any general rule of the on drive layout of RAID configurations. They might be different between software RAIDs, hardware RAIDs and between different hardware RAID controller manufacturers.

exactly, in nas qnap there was 2hd in raid1.

the volume [datavol1] identified by testdisk contains all the data, I don't want to restore the old raid.

my goal would be to make that hd accessible only for the volume datavol1 (which contains all the data I want to recover) without compromising the other identified volumes. insert the 2nd hd in a usb 3.0 box connect it to a qnap external usb port and use it in read-only mode. is it possible to do this with testdisk?