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14
votes
4answers
878 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
204k 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
862 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
593 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
4k 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
913 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
868 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
3k views

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

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
831 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
2k 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
3answers
5k 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 ...
6
votes
2answers
559 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
1k 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
1answer
450 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
611 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
329 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
496 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
94 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
117 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
125 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
372 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
2answers
316 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
11k 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
248 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
143 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
2answers
3k 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 ...
3
votes
4answers
9k 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
69 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
1answer
3k 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 ...
2
votes
3answers
96 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
117 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
568 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
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
299 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
1answer
256 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
395 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
182 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 ...
2
votes
2answers
1k views

Why does the W2k3 TCP/IP stack gets corrupted?

I have a W2K3 server that every time an update restart the server, at boot the tcp/ip stack gets corrupted. This makes the server unable to do any kind of networking, and when i issue an ipconfig ...
2
votes
2answers
2k 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
2answers
699 views

MySql crash: Incorrect key file for table

We have a MySql 5.5 database running InnoDB on Linux. One table (named table_search) is running MyISAM to be able to perform full text searches. The table has 823 368 rows. Yesterday we had a server ...
2
votes
1answer
839 views

mysql.proc has gone corrupt. How can I fix it?

I have a server running Debian 5.0, and MySQL. Suddendly, MySQL stopped working, and after many attempts to fix it, I decided to reinstall it. I installed MySQL 5.1.63, and when started it goes to ...
2
votes
1answer
4k views

Lotus Notes is reporting: 'RRV bucket is corrupt.' when attempting to open an NSF database

I'm using the Lotus Notes Client version 8.5.2 on Windows. Its reporting error code 0x139e, 'RRV bucket is corrupt.'. I've tried opening it with and without the "fixup" flag but both fail with the ...
2
votes
2answers
3k 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 ...
2
votes
3answers
560 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 ...