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14
votes
4answers
915 views

How to store data on a machine whose power gets cut at random

I have a virtual machine (Debian) running on a physical machine host. The virtual machine acts as a buffer for data that it frequently receives over the local network (the period for this data is ...
14
votes
13answers
223k views

Error 0x80070570: How to delete corrupted and unreadable file?

On my system partition I have a folder which cannot be deleted. This folder has been created by restoring files from an Acronis TrueImage backup. The error message says: Error 0x80070570: The ...
14
votes
4answers
892 views

Mercurial repository corruption

This is somewhat related to this question but is a different question. We have a central Hg repository, served to users via SSH and mercurial-server. We have a number of Mac, Linux and Windows ...
12
votes
4answers
672 views

What *exactly* gets screwed when I kill -9 or pull the power?

Set-Up I've been a programmer for quite some time now but I'm still a bit fuzzy on deep, internal stuff. Now. I am well aware that it's not a good idea to either: kill -9 a process (bad) ...
12
votes
7answers
5k views

How can I force a MySQL table to become corrupted?

I have written a simple Nagios plugin that calls mysqlcheck (which checks for corrupted tables) and will give a warning if any are corrupt. However none of my tables are corrupt now. So I'm not 100% ...
11
votes
2answers
1k views

Making SD card corruption-proof

My embedded linux device uses an SD card for saving certain diagnostics data, far too copious for internal flash. The problem is if the device is switched off unexpectedly, the filesystem (FAT32) on ...
9
votes
3answers
974 views

nginx + fastCGI + Django - getting data corruption in the responses sent to the client

I am running Django behind nginx using FastCGI. I have discovered that in some of the responses sent to the client, random data corruption is occurring in the middle of the responses (might be a ...
8
votes
3answers
4k views

Causes of sudden massive filesystem damage? (“root inode is not a directory”) [closed]

I have a laptop running Maverick (very happily until yesterday), with a Patriot Torx SSD; LUKS encryption of the whole partition; one lvm physical volume on top of that; then home and root in ext4 ...
7
votes
3answers
6k views

How to corrupt a file system

I am going to be testing 'xfs_repair' on some large file systems ( around 50 TB ) as in the past the memory usage is high. While I could test the program only on file systems which were correct it ...
7
votes
3answers
874 views

Chkdsk capabilities

I've used several different tools for repairing disks and have been wondering if there is a list of what exactly CHKDSK can repair? The MFT? Boot sector? Backup boot sector? Clusters? What common ...
6
votes
4answers
3k views

Weird file corruption when using FTP. Any theories?

Sometimes when I'm uploading a large number of small files via FTP, some of the files' contents will be replaced with FTP control messages. For example, after uploading a website I'll notice that an ...
6
votes
2answers
727 views

Why did I experience checksum errors with a ZFS filesystem on an ESXi RDM?

I have a VMware ESXi 4.1 server which I recently added 2x1TB SATA drives to. This machine runs a NexentaStor Community VM which hosts ZFS filesystems. Before adding the new drives, all the ZFS zpools ...
6
votes
3answers
2k views

How to cause file system corruption for test purposes?

AFAIK the reasons for file system corruption are as follows: improper shutdown (hard reset); hardware failures (bad block on disk, bad disk controller); improper startup (mounting damaged file ...
6
votes
2answers
1k views

How to make a Linux software RAID1 detect disc corruption?

This is one of the nightmare days: A virtualized server running on a Linux SW-RAID1 runs a VM that exhibits random segfaults in seemingly random codechunks. While debugging I find that a file gives ...
5
votes
2answers
5k views

Prevent data corruption on ext4/Linux drive on power loss

I have some embedded boards running American Megatrends bios with embedded linux as the OS. The problem I have is that the industrial flash ide's will be corrupted on power loss. I have them ...
5
votes
1answer
70 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 ...
5
votes
1answer
477 views

Corrupt files' contents, while FS is OK

Looks like my USB HDD is old and corrupted: rsync: read errors mapping "path/to/file.jpg": Input/output error (5) Syslog: kernel: [58927.940676] sd 6:0:0:0: [sdb] Unhandled sense code kernel: ...
5
votes
7answers
3k views

Windows explorer (filename) string corruption when using remote desktop?

Has anyone else experienced this problem? While browsing folders in explorer over a remote desktop connection, sometimes the file name strings will get corrupted, so they display incorrectly in ...
5
votes
5answers
716 views

md5sum of large files gives different results sometimes

I have an AMD quad core, 8 gb RAM, 1 SSD EXT2 (2 months old), 2 HDD EXT4, approximately 1 year old. I'm using Ubuntu 10.04 x86-64 and when I compute the md5sum of large files (9 GB) sometimes I get ...
5
votes
3answers
333 views

file corruption on read/write 2.6.32-22-server (happens across many kernels)

I'm having an issue where after the server has been up for a period of time (~week/few days) the server will start reading corrupt data. For instance when I run a sha1sum of a file after a fresh boot ...
4
votes
2answers
546 views

Can't access NTFS file after BSOD. Corruption undetectable by chkdsk?

We have several files on a Windows server that show up in directory listings but can't be accessed. I can take ownership of the files, and the ACL shows that Everyone has read/write/execute access; ...
4
votes
7answers
2k views

Safe File System for Power Failure?

Has a file system been developed that is completely safe from power failure based corruption? If we assume critical data is being stored without a UPS and performance is irrelevant, does file system ...
4
votes
2answers
3k views

How to fix corrupt packet error for with rsync for (relatively) large files?

Trying to update files on a server, with the rsync command: rsync -ravq -e "ssh -o ConnectTimeout=2 -o ServerAliveInterval=2 -ServerAliveCountMax=2" --delete ./local_dir user@$SERVER:/dest_dir ...
4
votes
2answers
1k views

How can I track down the cause of ext3 filesystem corruption?

We have a VMware vSphere 5 environment running CentOS 5.8 virtual machines. In the past two weeks we have had five incidents of virtual machines having a filesytem become corrupt, requiring an fsck to ...
4
votes
1answer
146 views

Queries passed to SQL Server are getting corrupted

We are experiencing a bizarre error with our application at a customer site. We have managed to narrow it down to the point where we can replicate the behaviour using just Management Studio and SQL ...
4
votes
2answers
136 views

What are the warning signs that a MySQL table might be corrupted

For some reason, it's not the first thing I think of when diagnosing very strange table errors. I had an issue when doing an order by I'd wind up with only one record. Explain said I should have 28 ...
4
votes
4answers
390 views

Corrupt tar (Resulting folder smaller than packed file)

I have an issue with a tarball created on a SuSe 10.3 Server version. The .tar file has a size of 6.5 GB but if I untar it under Ubuntu 9.10 the resulting folder only has a size of 1.5 GB. commands ...
4
votes
3answers
471 views

How do I diagnose network corruption on an Internet path?

I run a few hosts on network A that make requests to servers (which I don't own) on network B, somewhere across the Internet. Unfortunately, many of these requests get corrupted. If I make the ...
3
votes
6answers
13k views

Should I stop MySQL repair?

MySQL database (20 Gigabytes of tables and index) went corrupt. I launched the repair option using MySQL-admin graphic interface, now it has been running for 24 hours. When I have check the MyISAM ...
3
votes
2answers
302 views

Detecting data corruption so we're not backing up corrupt files

I've been thinking about data integrity, I currently backup about 2tb of data and always have one backup of data from a year ago. My concern is if a file became corrupt on our production file server ...
3
votes
3answers
227 views

Recover from a corrupted couchbase install

We have a couchbase installation on a Windows 2008 R2 server that got corrupted (this was from before my tenure, now I want to clean it up). There is no add-remove entry in the Programs and Features ...
3
votes
2answers
3k views

Verifying Integrity of Data

I just set up a FreeNAS server with a terabyte drive. I want to only have one hard drive in each machine so I have been taking as much data as possible and sending it over the LAN to FreeNAS. I have ...
3
votes
1answer
2k views

Unable to resolve data corruption warning with fcsk

In order to create a contiguous space for my file system to grow, I created a new EFI System partition at sda1 so that I can migrate it from the current partition at sda5. The move itself has been ...
3
votes
4answers
10k views

NTFS file or directory is corrupted or unreadable

Anyone know of a way to delete files from an NTFS filesystem when you get "the file or directory is corrupted or unreadable". This isn't a file which is in use, I think it is genuinely corrupted, and ...
3
votes
1answer
122 views

could fsck -Af -M cause corrupt filesystem?

Last night my server encounter "Read-only file system" error. So then I ran "fsck -Af -M" to trying to repair but no use, these are output: fsck 1.39 (29-May-2006) e2fsck 1.39 (29-May-2006) /: ...
3
votes
2answers
4k views

Problem with msiexec.exe locking up when installing / uninstalling

I am running two virtual 2008 Windows Servers that have been having some reoccurring problems for the past few months. Msiexec.exe seems to run and always freezes at 25% cpu usage and around 12 - 15k ...
3
votes
1answer
4k views

CentOS 5.6 unexpected inconsistency how to repair?

This morning I found that my server was not responding and wasn't able to connect to it in anyway to do a safe reboot. I had to do pull the plug to reboot. Upon rebooting everything appeared to be ...
3
votes
3answers
626 views

Files on ext4 on Drobo with corrupt, zero-ed out blocks

I have a 2TB ext4 file system (Ubuntu running Linux kernel 2.6.31-22-server x86_64). This file system is the second drive on a Drobo box plugged in via USB. We've not had problems on the first drive ...
3
votes
1answer
128 views

MFT corruption on non boot drive. What could happen?

I have a server that is reporting some error messages related to NTFS corruption. It reports that there is possible corruption within d:\$mft However I have not come across any corruption, or ...
2
votes
3answers
114 views

zfs on a single device: what happens when a file is corrupted?

It is written everywhere that ZFS is helpful even if you only have one physical device, because it will tell you about data corruption due to bit decay and such. However, can it actually address such ...
2
votes
2answers
124 views

Single file changed: intrusion or corruption?

rkhunter reported a single file change on a virtual server (netstat binary). It didn't report any other warning. The change was not the result of a package upgrade (I reinstalled it and the checksum ...
2
votes
3answers
715 views

CentOS Superblock corruption?

I'm on CentOS 5.2 and I'm having a problem booting my two database servers. Our IT department performed a SAN upgrade over the weekend and now I can't boot - they say the upgrade went fine but ...
2
votes
1answer
300 views

Will repairing a MySQL table run the risk of data loss?

I recently had a table in my MySQL DB go haywire (part of my Invision Power Board install) which has never happened to me before. If I use the "Repair" tool in phpMyAdmin, will I run the risk of data ...
2
votes
4answers
2k views

Downloads are consistently corrupt, what are the potential causes?

I am consistently experiencing corrupt downloads over TCP/IP and Ethernet on a small LAN, the downloads are coming from different sources on the Internet. WAN is comcast cable.. NIC is brand new. My ...
2
votes
1answer
243 views

FreeBSD pkg database deleted

after resolving repeated crashes on startup with fsck I noticed some files were removed, one of them was the sqlite pkg database, so now when I run for example pkg install somepackage I get this erro: ...
2
votes
1answer
908 views

win2008r2: Delete corrupted directory without reboot

I have a recurring annoying issue on one of my Windows 2008 R2 Web edition servers. The drive in question happens to be a SSD, though I doubt that is relevant. I have a script that I run when I want ...
2
votes
2answers
3k views

Diagnosing cause of orphaned inodes on Linux, busy MySQL?

One of our servers recently experienced some file system corruption and our root file system was automatically remounted as read only. The steps I took to recover were: attempted to remount > ...
2
votes
4answers
405 views

Data Corruption (what does it usually look like?)

When you have corrupted data: through packets, or hard drives, what kind of errors do you usually find? Is it a bit tranposition (switched bits)? Is it random noise? (flipped bits)? And when you do ...
2
votes
1answer
229 views

Which is more durable? MyISAM or InnoDB with innodb_flush_log_at_trx_commit=0 [closed]

I am trying to determine the difference in durability between MySQL's MyISAM and InnoDB when innodb_flush_log_at_trx_commit=0. I am aware of the some of the benefits of InnoDB with ACID. However, ...
2
votes
3answers
1k views

Corrupt Linux sda3 var drive - need some files

It's 3 a.m., and my hosting company says a 'networking issue' occurred and, in summary, they can replace the hard drive that has developed a 'fault', but they will not assist me in recovering my data ...