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Questions tagged [corruption]

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Corrupt Profile: Tried to restore through registry but now it's worse [closed]

Not quite sure if this is the best forum for the question, it is related to Windows 7 ultimate, but it's a single computer. The situatio is as follow, one day when tried to log on the PC, the user ...
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0answers
21 views

What does it mean when 24 contiguous bytes in a file are corrupted? [duplicate]

I copied 500 MB of files from one hard drive to another and four files were found to be corrupted on the destination drive, each with one section that had 24 bytes different from the source. What ...
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1answer
26 views

Is it possible to recover Microsoft Office files from a flash drive when they were edited and saved on the flash drive directly?

Several .docx and .xlsx documents were saved on a flash drive, edited in word and excel applications, and changes saved directly to that flash drive again. These files, when opened, now contain only ...
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31 views

Is it possible to relink an Inode in EXT4 with it's original filename

Ok, so foolish idiot here, trashes his postgresql data directory, right at the very moment when his backup routine is currently in the "delete old files" and "create new files" phase. As a result, Iv'...
0
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1answer
29 views

Strange file corruptions in ext4

Recently I came in contact with what appears to be disk corruption scenarios, and I would like to understand them better. I have a build server which I work with daily. During one full build of a ...
3
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2answers
194 views

How does SSD meta-data corruption on power-loss happen? And can I minimize it?

Note: This is a follow-up question to Is there a way to protect SSD from corruption due to power loss?. I got good info there but it basically centered in three area, "get a UPS", "get better drives",...
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3answers
3k views

Is there a way to protect SSD from corruption due to power loss?

We have a group of consumer terminals that have Linux, a local web server, and PostgreSQL installed. We are getting field reports of machines with problems and upon investigation it seems as if there ...
0
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1answer
76 views

LVM - Should I encrypt physical volumes or logical volume?

I have two hard drives and I'm about to build a backup system. Now I'm wondering which solution would be the best. I encrypt disk1 and disk2. After mounting these I create a volume group and logical ...
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3answers
3k views

Apparently Robocopy does not understand Windows Server 2016 deduplication. Is there a way to make it work without corrupting the volume?

Scenario: Doing a server migration from old Server 2008 R2 to new Server 2016, following this Server Fault guide: File server migration using Robocopy After Robocopy completes, enable deduplication ...
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1answer
73 views

ext4 corruption leading to unbootable disk. Partition is mountable, but grub detects unknown filesystem

I'm trying to recover from a system disk corruption issue without having to reinstall the OS, which would be super-painful currently. I'm using Ubuntu 18.04, the affected partition is ext4 and on a ...
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0answers
74 views

Root cause for having a number of zero bytes in regular files

We have corrupt files that contain a number of zero bytes. I wonder what the root cause could be. What I know is: All kinds of files that were recently written are affected, they contain a number of ...
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1answer
72 views

Corrupt `reverse i-search` database: why and how?

I made a recording of this as it's never happened to me before and seemed pretty weird: https://asciinema.org/a/qVSUzkIX2wLia7EzCFhCYHb9Q Under which conditions would the bash completion database ...
1
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1answer
171 views

Mapped VMDK no longer accessible - VMware ESX - recover data

At my company we have a virtual Windows 2012 R2 server running on VMware ESX. The server has 3 disks attached on different LUNs. (Disk 1 & 2 are on a smaller LUN containing multiple servers that ...
1
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2answers
783 views

Why isn't TCP corruption more noticeable?

First of all, apologies if this seems a somewhat simplistic question. According to this answer, TCP packets are corrupted all the time without the checksum catching it. If this happens so often, ...
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0answers
537 views

Gitlab error: inflate: data stream error (unknown compression method) Occuring many times

I am getting error:inflate: data stream error while taking backup using gitlab:rake gitlab:create:backup sw/org.cple.tdc.groupst.wiki ... [DONE] sw/org.cple.tdc.tcmp ... [DONE] sw/org.cple....
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1answer
1k views

Corruption of in-memory data detected: where does the issue lie?

We are experiencing crashes on our SSD VPSes, all working on KVM: crashes occur for different reasons; in the hurry to restore the service my team uses to reload a previous snapshot of the machine and ...
2
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1answer
217 views

Does Perkeep (camlistore) have built in protection from bitrot?

Does Perkeep (PKA Camlistore) offer protection from silent corruption (eg. bitrot) of the data in its current design like what is offered in ZFS. If it does, how well does it fare when compared to ZFS?...
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2answers
118 views

What scale of data loss or corruption do I risk if I enable the write buffer on a file server?

I have found plenty of articles online warning of risk of data loss or corruption for drives with write-buffer enabled in the event of power loss. However, I haven't found any that actually refer to ...
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3answers
611 views

ZFS-HA pool faulted with metadata corruption

I setup the ZFS-HA following the excellent description Github (see here). After extensive testing, I rolled the setup out to production using 5x12 disks in RAIDZ3 connected to two nodes using HBA ...
2
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0answers
29 views

Files saved to Samba share are randomly differing from originals?

I manage a small network of windows clients and a BSD file server running Samba 4.6.x. We had some odd issues which led to the discovery that when users save files to the server, about 12% of the ...
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0answers
326 views

Frequent external USB drive corruption ESXi 6.5 Windows Server 2008 guest

I am having problems with an external USB 4TB hard drive (Toshiba Canvio USB 3.0) frequently becoming corrupt and unreadable. The drive is only a few months old, but has become corrupted 3 times so ...
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1answer
629 views

CRC error in several compressed files

I have a server which backs up itself on another server with duplicity (actually duply). The full backup is about 330 1-GB files. The full backup finished without problems, but the next day the ...
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1answer
311 views

File System Corruption in AWS Storage Gateway Volume

Has anyone had to deal with a corrupt file system on a storage gateway volume? One of my volumes is now telling me that it's corrupted or unreadable. I've tried running a chkdsk /r on it and it took ...
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2answers
5k views

How to repair a broken-resized qcow2 disk image for libvirt/kvm?

Today I wanted to increase the size of a VM, so I did what I always do (have done it before): qemu-img resize diskimage.qcow2 +22GB Then the file broke and the VM does not start any more. I tried ...
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2answers
7k views

Risk of not repairing “Structure needs cleaning” XFS errors

I have an XFS file system with file system errors affecting some non-critical files. I wish to repair it; the business wishes to continue to run with those errors. What are the known risks of not ...
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1answer
226 views

mysql keeps crashing corrupt databases

I have been trying to solve this for about 8 hours now. Due to unrelated issues, I had to remove mysql and re-install it. since then, mysql crashes and restarts every 2-3seconds with the below in the ...
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2answers
327 views

How to corrupt a file without changing attributes for integrity testing?

I'm trying to create a process for comparing two folders that should contain exactly the same files. Would like to be able to modify a file's content without changing the attributes as if the file was ...
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0answers
71 views

How to find the cause of a single event file content corruption?

A few days I copied a large (56GB) file from a workstation to a file server. After checking the copy I found out it had a few bytes different from original. Details: source system: Medion Akoya ...
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1answer
82 views

Database Index files get corrupted if shared folder resides in Win Server 2012 but not if it resides in a regula Win 7 PC Shared folder

Database application programmed for peer to peer access to a shared folder experiences database associated index files corruption if said shared folder resides in Win Server 2008 or Win Server 2012. ...
2
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1answer
215 views

ZFS corrupted directory, but zpool doesn't detect anything wrong

A directory on my FreeBSD 10.2 server somehow got hopelessly corrupted (wasn't ZFS supposed to prevent that?) ls or any other command against it leads to current session getting frozen on the kernel ...
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0answers
100 views

File transfer data corruption

I am having a very strange data/file corruption over GRE/IPSEC tunnels. I have two sites connected with WAN links (four links, 80mbps one, 50mbps another, and 20mbps remaining ones). I am using GRE ...
0
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1answer
729 views

Two LVM volumes on a shared storage. Will it lead to data corruption?

I have a setup in which one SAN storage connected by FibreChannel is accessible by two hosts (at block level). And I want to create two lvm2 physical volumes on the storage: pv1 and pv2, for now being ...
2
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1answer
466 views

Ensuring VMware ESXi storage integrity?

I'm planning a small ESXi standalone server to host a number of VMs I use here. I haven't decided what facilities to use from the wider vSphere system. The underlying VM storage is local HDD RAID ...
0
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2answers
789 views

How to avoid file corruption upon power shortage

I have an industrial PC (Windows posready 7) running a server application that was corrupting files too often when the pc was abruptly turned off (power shortage) and I found that changing my code to ...
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0answers
415 views

System File Corruption causing Freezing a KSOD

At present we are having some difficulties with one of our Terminal Servers. It is a VM Server 2012 (64bit) What is happening at the moment is that random applications (IE, Chrome, Notepad, Word, ...
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69 views

Active Directory Corruption

We are looking at the topic of DR at the moment and I would like your expert help in the creation of a DR plan in the event that our Active Directory somehow becomes corrupt. We have 4 domain ...
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0answers
606 views

File System is corrupt Windows Server 2012 R2

I keep recieveing an "The file system is corrupt" error on a new Dell powerEdge T430 Server running windows server 2012 r2. I am running in a RAID 5 config with 3 Kingston 960 GB Enterprise SSD's. I ...
0
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1answer
700 views

Are zero byte files an indication of file system corruption?

I recently noticed a strange behaviour. I could not restart a productive webserver running since more than a year because the configuration was invalid: # /etc/init.d/apache2 restart Syntax error on ...
0
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2answers
81 views

Database log file corruption in SQL Server 2005

I've been going through data corruption from last 2 days in row that .ldf getting corrupted and I've to fix it. I did my research that I need new server and management studio because whatever we used ...
2
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3answers
1k views

Exchange 2013 database corruption with event 476 in ESE

I'm having some random database corruptions on our Exchange Server 2013 with event 476 on ESE. This is the fifth time that this happens and the situation in already unacceptable. Here's an screenshot ...
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2answers
899 views

zfs checksum error in raidz1 vdev but not in disk

I am backing up data stored in a zpool consisting of a single raidz vdev with 2 hard disks. During this operation, I got checksum errors, and now the status looks as follows: pool: tmp_zpool state:...
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0answers
3k views

Corrupt WiredTiger MongoDB files

I'm running MongoDB with the WiredTiger engine on an ext4 file system. The last thing that I did was start building an index, but then something came up and I needed to cancel the index build and ...
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0answers
569 views

elasticsearch glibc memory corruption

My elastic search clusters keep crashing for no reason. All I can see in the logs is : INFO | jvm 4 | 2015/04/17 19:10:09 | *** glibc detected *** /usr/java/jre1.7.0_04/bin/java: malloc(): ...
2
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1answer
5k views

Server with multiple replicate=do-db entries

I have a server that someone has setup which are acting as a master-master on both servers. Since they have been configured as both master on the same database, changes in one end has caused all sorts ...
5
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1answer
154 views

Active Directory Users - All Attributes Suddenly Blank

We had an instance yesterday where approximately 130 of our well over 5,000 user objects suddenly became corrupted. Every attribute you can possible set with the exception of sAMAccountName and cn ...
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2answers
739 views

Purposely corrupt folder name?

I want to intentionally corrupt a folder name so I can test a script on it. Currently the folders are named similar to : 37ee0500-52c0-4a18-861e-0084EF05FB and are located in: /user/members/local/ ...
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1answer
682 views

Percona slave crashes with “unexpected PLT reloc type”

I have 2 data centers each with a master/slave database running Percona server 5.5.23. For some reason, one of the slave databases crashed with this error: 03:00:40 UTC - mysqld got signal 11 ; ...
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1answer
1k views

What happens to a random bit error in the cache on an Intel CPU?

I have a system with ECC RAM and a Xeon E3 CPU. My understanding is that ECC circuits on the RAM will detect corruption from random bit errors in the RAM chips. But what happens to random bit errors ...
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0answers
121 views

Exchange 2010 VHD Corrupted But Is Not

I am experiencing a strange problem with my Exchange 2010 server. The virtual disk holding all Exchange databases on the Exchange server is acting like it is corrupted. If I run chkdsk E: /F is says ...
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0answers
481 views

How do I rebuild a VMhost datastore following a corrupted installation

My server was shutdown at the weekend for a planned power outage to our building. When I tried to the bring the server back up, along with some errors about logical drives that did not exist (now ...