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Questions tagged [data-recovery]

Reclamation of deleted or otherwise removed/corrupted data (files)

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EXT4 partition became empty after reboot - why? possible to fix? [migrated]

TLDR: I had a 1TB RAID1 partition containing 800GB of files before rebooting, now after rebooting, the partition is empty. Hardware: dual SATA 1TB drives in RAID1 (ASUS PIKE card, which is a LSI card)....
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How to recover corrupted HDD with LUKS encryption?

There's a 1TB HDD which is somehow corrupted. It has only one partition and it's LUKS-encrypted, as far as I know. The password is known. The HDD used to prompt for the password right after it was ...
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2 answers
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How to recover deleted SQL server in Azure?

I mistakenly deleted the database server. I need help. I made the mistake of creating a new server with the same name, will it be possible to recover a database? I have previous resource name data and ...
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1 answer
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mysql, relocating individual databases vs entire data directory

I need to relocate mysql customer databases to another disk, for the purposes of: 1. Separation of user data from system files 2. Ease of backing up system and user data separately 3. Ease of ...
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2 answers
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One bad sector causes the whole RAID0 to fail? [closed]

In our server, we have four SSDs. The first one is for OS, and the remaining three are for RAID0. Today, the disk mount corresponding to RAID0 suddenly goes missing. When I check the disks, the 3rd ...
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1 vote
1 answer
102 views

How to use ext4magic in LVM?

I'm trying to recover using ext4magic.my partition was LVM. try to execute command ext4magic /dev/sda1 -J -f -s 2048 imges/ error /dev/sda2 Error 2133571347 while opening filesystem ext4magic : ...
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ZFS after disk failure: most of data seems to be intact, but how to extract?

I have a zpool after disk failure. Attempt to import it (even zpool import -F -T 12855264 -R /mnt -f rpool) yields errors Dec 4 12:56:54 freebsd kernel: Solaris: WARNING: can't open objset 1035, ...
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240 views

Recovering data from a zpool with a missing device

I have a zpool consisting of two mirrored drives, storing all my personal data. I wanted to add another mirror drive, since the other drives have been in use for several years now. Instead, I managed ...
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Recovering data from a Dell MD3220 array after both controllers have databases that were corrupt

I have been working on trying to restore data from an array created on a Dell MD3220 PowerVault storage unit. On the phone with Dell and another support group for weeks now and running into brick ...
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How to recover centos root data after change in formatting type?

To better explain what is wrong now with my harddisk let me tell you the series of events: I was trying to expand a CentOS root partition. In order to do that I first tried to unmount and remove the ...
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-2 votes
1 answer
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Recover data from failed RAID 5 Dell Poweredge T710 Server [closed]

Very important data on RAID 5 array on poweredge T710 server - how can I get the data back? Willing to spend money to do it (eg buy a replacement system and swap the disks in), would prefer not to ...
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1 answer
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Recovering a nested PV

On my Proxmox 6.4 host, I had an LVM Thin pool that was 250GB large. I created an Ubuntu VM (which used LVM for the root partition as well) on it, but accidentally oversubscribed it, so the PV inside ...
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RAID 5 Data Recovery (Missing Partition)

I really need help. I am running an XCP-NG server, with an LSI MegaRAID 9260-8i card installed. I have a RAID 5 virtual disk with one partition on said disk that takes up all the space. That partition ...
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2 votes
3 answers
1k views

Need to recover RAID 6 array

By definition RAID 6 is an array of independent hard drives equipped with two independent and distributed checksum schemes Does that mean I can recover each of the hard drives one by one using ...
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1 answer
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How do you generate a new encryption key for a drive that uses SED (Self Encryption Drive)

So I'm currently learning more about NVMe drives that ship with a feature called SED (Self Encrypting Drive). Take the Smasung 970 EVO for instance. It clearly states that it features SED. The 970 ...
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Create a boot partition snapshot (win10)

I'm slightly desperate, of what is the best practice to: install a fresh version of windows 10 strip it down install applications you need setup configure everything create a snapshot of the whole ...
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Hard Drive Recovery - I/O Error - Bad Partition Table and Filesystem

I am attempting to recover an external hard drive. It is western digital (like always). Force mounting does not work: user@linux:/home/user# mount -t vfat /dev/sdb1 /media/test1 -o force,umask=000 ...
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8 votes
1 answer
2k views

Does one failed drive + one single bad sector destroy an entire RAID 5?

During planning my RAID setup on a Synology Disk Station I've done a lot of reading about various RAID types, being this a great reading: RAID levels and the importance of URE (Unrecoverable Read ...
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1 vote
0 answers
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Progress for zpool import -fFX

I'm running zpool import -fFX on a 8x4TB striped, mirrored (raid10) pool. The documentation states the extreme rewind import (import -X) performs a full traversal of all blocks in the pool for ...
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2 votes
1 answer
333 views

Recovering data from TrueNAS pool in Ubuntu

I am having a heck of a time trying to get my data off my drives that were in a pool in TrueNAS. I installed Ubuntu on another drive in the same server and loaded Ubuntu 21.04 and installed zfsutils. ...
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-2 votes
1 answer
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I accidently deleted the partition tables of my RAID6 drives

I accidentally deleted the partition table of 2 drives in my 4 drive RAID6 by reversing the order of sudo sgdisk -R=/dev/sdb /dev/sdz parted /dev/sdb print currently reports: Model: ATA ST2000DM008-...
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2 answers
76 views

Recovering data from a single-disk raid1 array [closed]

I had an idea of a Raspberry Pi file server using multiple external disk drives in a RAID array. For starters I only had a single 1TB disk so I setup a raid1 array on that disk with the intent on ...
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Recover encrypted LVM

I had Debian install running on LUKS encrypted LVM. This morning, I wanted to install OS on external disk to be used on another host, but mistakenly I chose the wrong disk... Few seconds in I noticed ...
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How to restore Mysql database from .frm and .ibd files on localhost

I have a VPS server that was hosting a WordPress that has crashed and I think must be deleted. No backups were made. I managed to setup a rescue mode and salvage WP site data via FTP. Because Mysql ...
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1 answer
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highpoint rr62x RAID 5 status disable, recover saying parameter error

I have been using a Highpoint rr62x controller(BIOS version 1.3) for about a decade now. The RAID-5 volume is containing 4 disks-each 3TB. For the last five years my RAID has been disabled. I have ...
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2 votes
1 answer
194 views

fsck raid10 ext4 partition currupted, restore data

there is a volume in raid10 /dev/md3 it has a GPT partition /dev/md3p1 in ext4 with a size of 16TB. I accidentally ran fsck -y /dev/md3 causing the filesystem in /dev/md3p1 to get corrupted. fsck -b ...
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2 answers
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I accidently ran rm -rf /

I was writing a bash script to automate deleting something. I used the code rm -rf $path/* accidently i ran the script without passing path variable and since path variable is null , the command which ...
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Restoring VD on Perc 6

PowerEdge server with PERC 6 RAID, two VD, RAID 1 with two drives (mirroring) on each. System went down and when it came back up the four drive status lights all showed green, but a message was ...
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1 answer
127 views

Recover data from broken RAID 1 drive

I need to save files from a Buffalo NAS Linkstation with two physical drives that is not working anymore (2TB each, Raid 1). Error message says: The bad sectors in the hard drive may have reached a ...
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1 answer
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How do I recover Windows 10 with files recovered from a drive [closed]

I had a drive failure about 2 months ago on my custom built PC with Windows 10 (probably professional version). It was a Seagate drive and they sent the drive to recovery and sent back a USB ...
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4 votes
2 answers
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Linux XFS partition could not be mounted (can't read superblock) due to suddenly power shutdown, xfs_repair: read failed: Input/output error

After suddenly shutdown, my home directory which is a XFS partition could not be mounted and I can login to system by my account. But I can login with root account (because root and home directories ...
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1 answer
1k views

How to mount and recover data after succesfully building the raid again?

We have a synology nas and one of the 2 disks crashed although smart was passed and the data was intact. Note that although the disks are not in a raid, years ago we chose SHR and apparently synology ...
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1 vote
1 answer
62 views

NAS not recognizing hard drive

My work has a Thecus N89000 NAS with 5 hard drives, RAID 5. We had a power outage last week and when power returned the NAS was unable to find RAID and no network folders are found. In the admin ...
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DL360 gen7 + 2 SSD Raid 10 crashing and amber lighting nonstop - it works fine with 2 SAS HDD

Thats it pretty much, I have this recently acquired DL360 with 2 300gb SAS HDDs. Every thing works fine with them in RAID 10: no crashes, no sudden amber lights, no amber lights after every reboot, no ...
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2 votes
1 answer
456 views

Can UNAVAIL zfs be recovered?

My zfs pool is UNAVAIL and cannot be imported. I wonder if there would be any possibility that it is recovered or I can take out any data from it? Background I took over management of a server that ...
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1 answer
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Retrieving file and folder inside VM remotely using other system

Recently my teammate accidentally deletes numerous files even important system files inside development server. because of this our staff cannot login even in local so we cannot recover remaining ...
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2k views

Accidentally deleted folder in ubuntu 18.04

One of my client project accidentally deleted and this project was on my aws ec2 instance.I used command "sudo rm -rf /home/ubuntu/project" now that folder is removed and i need to recover it asap. I ...
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179 views

Recovering a btrfs partition

I'm attempting to recover (what I'm told is) a btrfs partition from a RAID5 array and I'm a bit stuck on the next step... The reason I mention it was RAID5 is because the array way deleted in the ...
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1 vote
0 answers
1k views

btrfs bad tree block - cant mount filesystem

I'm hoping someone can help me, trying to recover a btrfs pool, that lost 1st drive. I tried to mount the 2nd drive and I've been having fs errors. I got the 1st drive readable again, but it appears ...
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1 vote
1 answer
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LVM after vgcfgrestore got: device-mapper: reload ioctl on (254:19) failed: No data available

Server have Thin LVM with a few volumes: vm-130-disk-0 - was deleted and need to be restored. vm-137-disk-0 - was NOT deleted. Trying to restore /etc/lvm/archive/pve_00336-2034680334.vg which ...
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5 votes
0 answers
616 views

Recovering/importing ZFS Linux pool with duplicate pool name

I did something very stupid today in attempting to add a third mirror to an existing Linux zpool named backup. Suffice it to say that I made a couple errors because I don't really do much admin with ...
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1 vote
2 answers
233 views

Recover MySQL tables from removed Proxmox VM

Have the stand-alone Proxmox node with LVM thin and VM 130 volume /dev/pve/vm-130-disk-0 inside it. VM 130 was deleted accidentally. Mysql database was lost with VM. After we've discovered it in a day,...
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2 votes
1 answer
95 views

zfs rollback/recovery of snapshot on different server

I have created a snapshot of zroot/jails/jail1 as jail1@2020-01-10T17:31:40 on server1 and sent this snapshot to zroot/backups/jail1 on server2 The snapshot was properly created on the ...
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1 answer
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Recovering as much as possible from a LVM where some PVs failed

I have an LVM drive & filesystem made up of 4 disks. One of them has had a hardware failure and doesn't work anymore. When this happeend some of the files were readable on the filesystem, and some ...
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0 answers
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Data recovery from RAID5 volume managed by hardware controller

I am attempting to salvage as much data as possible off a failed 12 TB RAID-5 volume comprising 4 x Western Digital WD4000FYYZ 4TB hard drives in an OWC RAID enclosure that is based on the Oxford ...
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1 answer
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InnoDB recovery from datafiles

First of all, my MySQL DB and Linux skills are not so good. I spent several days searching for a solution and tried several approaches. The following approach is the one I came furthest with. My SD ...
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1 vote
1 answer
364 views

Recover data from RAID1 single disk only

root@rescue:~# fdisk -l Device Boot Start End Sectors Size Id Type /dev/sda1 69632 102713344 102643713 49G 83 Linux /dev/sda2 102782976 467808255 365025280 174.1G ...
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2 votes
1 answer
942 views

RAID partition cannot be mounted, not assigned partition number, after reboot

Problem: I have a CentOS 7.5 server with an array of 4x 3TB WD Reds in hardware RAID 5. The RAID volume has a single EXT4 partition on it. After a recent reboot of the server, the server can no ...
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6 votes
1 answer
184 views

Recovering lost VHDX / VM (deleted by Veeam)

Earlier this week a VM on one of our hypervisors experienced extended downtime (~24 hours) due to some Windows updates going wrong. I ultimately was able to fix the issue, and noticed yesterday that ...
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4 votes
1 answer
273 views

Recover data from RAID 5 with VMFS data store

I own an HP Proliant Gen-6 ML350 server which is not turning on again after a power outage. According to my research it is most likely due to a failue of the power supply backplane or the power supply,...
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