Questions tagged [data-recovery]

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

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7 views

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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1answer
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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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19 views

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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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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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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229 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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1answer
135 views

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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89 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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2answers
122 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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1answer
25 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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172 views

Cloning disk with GPT using ddrescue

I am trying to save data from my failing external USB-HDD (Maxtor M3 Portable) to another USB-HDD (Western Digital). (The original drive does not support SMART.) The disk uses GPT and has one ...
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1answer
48 views

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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24 views

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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1answer
132 views

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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1answer
118 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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How can I make a low-level image an NVMe drive?

I have an Intel NVMe (U.2) drive attached to my computer. TL;DR: How can I create a low-level image of an NVMe SSD (an Intel SSD 750) that includes all data on the drive, including the contents of ...
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57 views

Save data from a corrupted file system with SCP

An instance I manage recently experienced file system block errors and passed in Read Only mode. Before any attempt to fix it, I wanted to save one specific docker volume. scp -r -v user@some_domain:...
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Procedure to obtain data from transferred centos-6 kvm guest image on two logical volumes

Original question: I am trying to recover data from a kvm guest image transferred from a defunct centos-6 host: I have recovered one guest without difficulty. The second one will not start. The ...
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1answer
199 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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77 views

Recover data from destroyed ZFS filesystem

I have a 1TB filesystem in a Proxmox environment, that was unluckily destroyed by Proxmox while trying to restore a container. Can the filesystem be recovered, or at least part of the data stored in ...
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1answer
62 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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1answer
123 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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1answer
99 views

Diagnosing missing logical volume

EDIT: the system boots off a 16 gigabyte USB key. Apparently, at some point, the 'device name' (sorry if I'm using that term incorrectly) of the boot device changed.from /dev/sde to /dev/sdb to /dev/...
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1answer
39 views

Exchange 2013 powershell mailbox recovery

I wish to script the procedure to bring the mailbox back from Dumpster. In my normal procedure I do as below '$Dumpster = Get-MailboxServer | Get-Mailboxstatistics' '$Dumpster | ? {$_.DisplayName -...
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1answer
73 views

Data corruption when rsync command fails

I am using rsync to copy data from machine A to machine B over a network. If rsync fails while copying the data from A to B, will the data at B get corrupted ? Does rsync has any inbuilt mechanism to ...
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1answer
997 views

How can I recover my ZFS pool, which suddenly went offline and reports that it was “last used by another system”?

tl;dr: I am running a FreeBSD 11.2 NAS server with ZFS on a server with 16GB ECC memory. I've discovered that my main pool has disappeared. ZFS can see the pool, but reports fault ZFS-8000-EY and ...
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2k views

Restore mongoDB by --repair and WiredTiger

We accidentally deleted the directory rm -rf /data/db which was our MongoDB path, and thanks to extundelete, we recovered it and got the directory /data/db. Here are our files in the directory, and ...
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3answers
3k views

Database accidentally deleted with a bash script [duplicate]

Edit: a follow-up question: Restore mongoDB by --repair and WiredTiger. My developer committed a huge mistake and we cannot find our Mongo database anywhere in the server. He logged into the server, ...
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1answer
265 views

photorec photo recovery software not seeing my mounted filesystem - trying to use photorec to recover lost jpegs

What is my situation? I am working in a Dev Ops capacity for a service that manages jpeg files online. We had an unfortunate deploy and our media files (jpegs) are completely gone. I anticipate that ...
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0answers
201 views

ddrescue - retry bad sectors starting from the end of the disk

How can I attempt to read bad sectors from the end of the disk, using ddrescue? I have dynamic volumes and the LDR is kept at the end of the disk, unlike MBR. I remember that I've tried --reverse but ...
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2answers
303 views

Failed XFS after resizing partition

I pretty much followed the same general idea as here: Resizing a partition -Resize VMware disk: Through vSphere, resize disk from 100GB to 300GB (Reboot VM) -Delete partition (fdisk /dev/sdb, d, 1) -...
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1answer
78 views

btrfs recover: reliable or last-straw?

The chunk tree of a btrfs filesystem corrupted and I could not recreate it after hour-long reconstruction. As a last resort (besides restoring from backup) I could use btrfs restore -S -x -m -v to get ...
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1answer
47 views

Examine contents of unused space on the HDD

When using managed dedicated services, either virtual or physical, where you're presented with complete control to an operating system installed on some piece of hardware you don't have physical ...
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1answer
363 views

Unable to mount a RAID 5 volume

Evening all, Total n00b when it comes to Linux, I use Xpenology (Synology) as NAS software and following a faulty SATA cable lost my RAID 5 volume - within the OS it's sat in a crashed state. ...
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1answer
436 views

Recover from a clean, degraded RAID-5

Good morning all, I have some NAS software which - for the most part - works great, but when something happens to the Hyper-V host it often fails spectacularly. Today is one of those days. I'm not ...
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1answer
41 views

Retrieve data from an HD with vmfs partition

My problem is the following: I have a 1TB HDD with the information of a server that I need now. I do not know what to do to access the information, inside the HDD there is a vmfs formatted partition ...
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1answer
7k views

How to recover an ext4 signature deleted with fdisk?

While resizing an EBS volume on Amazon AWS I accidentally deleted the ext4 signature. root@server:~# fdisk /dev/xvdf Welcome to fdisk (util-linux 2.31.1). Changes will remain in memory only, until ...
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1answer
174 views

How to recover a TAR file from a partially overwritten XFS disk?

This is the scenario. The environment is Linux (Arch Linux actually). An uncompressed 1,3TB tar file has been written on a freshely XFS-formatted 2TB disk as a backup. Later on, a 586MB UEFI boot ...
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1answer
232 views

Recovering deleted plain text (emails) files from raw disk image

I'm hosting my own linux mail server for my family. Yesterday my father lost all the mails in his Inbox folder. I'm still not sure whether it's due to a terrible user error or compromised password, ...
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1answer
174 views

Dual SAN controller failure [closed]

I am new to storage but facing a serious disaster issue of the failure of Dual SAN Controller. Don't know whether this is a right place to ask this question. Anyways the problem is, None of the ...
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2answers
220 views

Can data be recovered from a scrambled SSD?

If I "shred" (this is a Linux utility/command) an SSD, can the data still be recovered?
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1answer
1k views

Corrupted LVM Recovery

I had (paying attention to the past time here) a Centos 6.7 host who was migrated using Vmware conversion tool from a HyperV cluster. Therefore, the final configuration of its disks was: / dev / sda1 ...
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1answer
55 views

Recovering formatted Microsoft Storage Space Raid-5

I have accidentally formatted my Storage Space. The setup is 3 units of USB 3.0 Hard drives with 4TB each. Total 7.4Tb of storage available. I have used Active File Recovery with no success.It finds ...
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0answers
47 views

Recovering VCS 2 node cluster in DR?

We are looking for a solution to recover the 2 node VCS Cluster at DR location for a DR Test. Prod: Hardware is Dell with 24 cores 64 GB RAM with Suse 11.4 Linux over SAN Boot & 4 NIC's of 1 Gig. ...
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1answer
783 views

Faulted zpool recovery - can I dd some disks to new disks to allow me to scavenge donors?

I am in the process of trying to recover a pool that had been degraded and neglected, then had a second mirror member fail, resulting in a faulted pool. For whatever reason, the spare never ...
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1answer
79 views

highpoint rr640l raid 5 status disable, having difficulty with recover

I have been using a Highpoint RR640L controller (at BIOS version 1.5) for a couple years or more on my primary system. The RAID-5 volume contains 4 disks, 2TB each. This week, one of the disks ...
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774 views

MySQL won't start after forcing it to stop

I put my site on maintenance so no one can access it and no new data will come into the database. I was running a query to delete 3 month old data from a table which took almost an hour at which I ...
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1answer
2k views

How to recover a cached LVM with cache on ram-disk?

In this article there is a nice recipe for how to use a RAM-disk as cache-device for a classical LVM volume. Assumed you have an elder disk, lots of RAM and no SSD, you can boost disk performance to ...
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1answer
81 views

/etc/services file accidentally deleted on Amazon Linux EC2 instance

I accidentally deleted /etc/services file from my ec2 instance on AWS running Amazon Linux. How can I restore this file? In Ubuntu, I found out that this can be done using netbase package, how can ...
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0answers
97 views

InnoDB recovery from ibdata1 from disk failure

I started recovering data for a non-profit organization from a server that had a hard drive failure. The mysqldump was not working, but I managed to tar the /var/lib/mysql on time and download via ...

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