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Questions tagged [data-recovery]

DO NOT USE THIS TAG if your question is about recovering data you lost on your device. Only use this tag for programming issues related to data recovery. Data recovery is a process of salvaging inaccessible data from corrupted or damaged storage when the data cannot be accessed in a normal way.

342 questions
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Recover Data from Deleted RBD Volume?

Is there any way to recover data from deleted RBD volume in Ceph? thanks $ ceph osd map pool-name csi-vol-65c11863-32e1-11eb-a202-cab20b4e04f6 osdmap e2248 pool 'pool-name' (8) object 'csi-vol-65c11863-32e1-11eb-a202-cab20b4e04f6' -> pg 8.e5d09b91…
Phan Hoang Hai
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Restore VM after loosing base files

We have an openstack platform with KVM as hypervisor. Due to some reason we lost VMs due to hardware issue with the physical disks. But we have the VM's disk files still present. But we lost the 'base' backing files. We want to restore the data…
Y.G. Kumar
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How do I read the raw bytes stored on an NTFS SD card in Java?

I'm stress testing an SD card by filling it up with junk data, then continuously re-writing a portion of it to hopefully observe NAND cell degradation. I'm using Java to both read and write .txt files to the NTFS formatted SD card (32 files of 1Gb…
Alvin Zhang
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How does DBMS utilize undo buffer and redo log files to recover changes made to the database?

How does DBMS utilize undo buffer and redo log files to recover changes made to the database?
Henok Tesfaye
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OpenCV repairs to scanned document missing (white pixels) scan lines

I have about 500 pages of PNGs representing a schematic for an early 1980s era DIGITAL DECsystem-20 KL10PV mainframe (publicly available). The scanning process was flawed in that randomly interspersed in the PNGs are white lines that represent…
Alan Mimms
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How to recover files that were moved to a single file?

I tried to move multiple files into a folder, but there was a mistake in my matlab code that I didn't create the folder. Now all the files were moved to a single file which cannot be opened or edited. How to recover these files? Example of the…
open0121
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Return deleted project from Eclipse

I have serious problem, I have deleted Java project from Eclipse and I don't have fresh revision on CVS. Is there any chance anyway to return that project or I am najebao ?
Damir
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How to use Android "Apply update from SD Card" to run custom script

I'm trying to recover some pictures from my HTC One M9. It freezes on reboot after just a few seconds. I can only access the bootloader screen (white background with colorful menu options) and the Android Recovery screen (black background with 7…
maximumViable
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Is there a way to read HD data past EOF?

Is there a way to read a file's data but continue reading the data on the hard drive past the end of file? For normal file I/O I could just use fread(), but, obviously, that will only read to the end of the file. And it might be beneficial if I add…
Loduwijk
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tar error: executed tar command with same output-file name as source-file

Instead of executing the following command: tar -zcvf file.tgz fileX I executed the following instead: tar -zcvf fileX fileX I encountered the following message on the screen: tar: fileX: File shrank by 199917 bytes; padding with zeros Now I…
Vivek Kumar
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Deleted a Mongodb data folder by accident on ext4, how to best recover data?

What's the best/fastest/safest way to recover deleted files from ext4 ? Specs: The disk is 1TB SSHD (hibrid HDD + SSD), also the partition is encrypted with LUKS Encryption (version 1) Mongodb is using WiredTiger as a storage engine. Also if I…
Stefan Rogin
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Fixing invalid memory alloc request at PostgreSQL 9.2.9

I've encountered a problem querying some of my tables recently. When I try to select data I get an ERROR telling: ERROR: invalid memory alloc request size 4294967293. This generally indicates data corruption. There is a nice and precise technique…
Anton Zvonovsky
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Java encrypt file data and write it on same file

I'm working on a project to Encrypt/Decrypt files. as this is my first time, I'm wondering if I'm doing it right or not. till now, my idea about encrypting is this : Select a file -> Read all its bytes and add it to byte array -> Encrypt the byte…
Sepehr GH
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How to get the offset in a block device of an inode in a deleted partition

During a fresh installation, I accidentally formatted a disk containing datas. I have tried using some tools: testdisk, foremost, but I did not get good results. (see my unsuccessful post on superuser). So I have decided to read some docs about ext2…
Gaël Barbin
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How to launch Airdroid web server from adb?

My Galaxy S4 screen broke - basic cellphone issue. I have Airdroid installed and I really need to access some of my SMS and contacts informations. My device is rooted and USB debug is enabled but I cannot adb in root mode because apparently it is…
Jeremy Dicaire
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