Ubuntu :: After Power Loss Files Not Displayed But Still Using Space / Fix It?
May 31, 2011
After a power outage my external hard drive that I use to serve a DLNA server with content lost all the files.
The parent directories are still displayed, but there is nothing inside them, and I cannot write anything into them. (creating any file in them does not work.)
I assume that I have a corrupted drive but I was hoping to find a way to recover the content. Most of it is backed up, but I have become a bit lazy in the past month, and have not backed up so there are a number of videos I don't want to lose.
It seams odd that the directories show up, but the files don't. The drive properties also show that the correct amount of the drive space is taken up (for the videos to be present) so I haven't reformatted because I assume that will wipe out all traces of the data.
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May 31, 2010
Ubuntu 10.4 on desktop system. Everything was working satisfactorily until...Trying to boot up after a power loss I got "ERROR: You need to load the kernel first."I tried to boot into recovery mode and got "ERROR: HD0, 1 out of disk ERROR: Couldn't read file Loading initial ramdisk ERROR: You need to load the kernel first."Next I booted with the live Ubuntu disk to see if I could mount the drive from there and got thisError mounting: mount: wrong fs type, bad option, bad superblock on /dev/sdb1,missing codepage or helper program, or other errorIn some cases useful info is found in syslog - try
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Apr 2, 2010
Today, I was upgrading my desktop from Jaunty to Karmic (a little behind schedule, I know). All packages downloaded successfully, and then the computer began the process of applying all of the updates. During this period, at some point, it lost power. Now, of course, it won't boot.
Fortunately, I have a separate /home/ partition, and it was unmounted during the upgrade process. So, my personal data and settings are fine. But the OS is useless.
I'm guessing that I'm completely buggered here, and there is nothing that I can do except re-format the Ubuntu partition and clean install Karmic from an install disk.
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Feb 24, 2010
recommend any utilities that would check the hard drive and its contents (if they are still good) following a power outage?
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Oct 25, 2010
I have observed a problem twice now with Apache trying to restart but hanging somewhere in the process. This happens after a power failure; the machine comes back just fine, but not the web server. The machine is on a UPS, but occasionally it runs out of "juice" before someone can get to it (we have a generator for emergencies). When this happens, a ps indicates about three processes running that are trying to start Apache, but they just sit there - this time for three days since the power failure was on a Friday. I can fix this by killing those processes and doing an Apache restart - but that takes human intervention, which is not acceptable.
I suspect this may have to do with SSL, since when I do a manual restart it asks me for the SSL password. There must be some way around this so the system can recover on its own. This system's web site runs under SSL since it maintains medical information that must by law be protected. But it also could be life-threatening to someone if the system can't come back and as a result a person can't get help.
So I would appreciate some guidance as to what I could change that would allow for system recovery without intervention. I'm happy to provide any configuration file info, if you tell me where to look.
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Jan 24, 2011
I'm wondering what my alternatives are when I lose power to the external hard drive where I have Debian installed. I realize that the best answer may be a battery backup UPS for the external hard drive. It seems that I recall that when a similar scenario happened on my SunOS Sparc workstation, I would simply hit [Stop-A] and then type in the "sync" command. I now have a laptop and am running Debian off of an external harddrive that has its own power supply. When I lose power, my laptop obviously continues to keep running but my session is essentially and understandably hosed because the main filesystem is not accessible. Gnome desktop goes away and I am thrown to the main console login. When power resumes, I cannot login to attempt a remount or anything. When I hit [ctrl-alt-del] thinking that that is less forceful than just holding down the main power on the laptop, I get cannot execute "/sbin/shutdown". Is there a [STOP-A] sync equilavent or some way or keyboard sequence to get to GRUB to issue a reboot command?
[108200.233484] EXT3-fs error (device sdb1); ext3_find_entry: reading directory #55500801 offset 0
"
"
INIT: cannot execute /sbin/getty"
INIT: ld "1" respawning too fast: disabled for 5 minutes
INIT: cannopt execute "/sbin/shutdown"
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Oct 3, 2010
When i am updating suddenly the power gone.what i have to do now.
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Apr 19, 2011
I have three machines networked to my desktop which run a bunch of simulations in parallel. As they're running, I connect to them via SSH and screen to keep an eye on the runs and look at the output. They stay usually connected for days at a time. The SSH servers and client are running Fedora 14. Yesterday one of my coworkers accidentally yanked the plug on one of the servers while it was running. When I powered it up again, I started getting some odd connection problems. I couldn't connect to it via SSH initially because I got the Remote Host Identification Changed (RSA host key changed) error. I deleted the key in .ssh/known_hosts, which allowed me to connect, but it denied my password. I then logged into that machine locally, restarted sshd, and removed .ssh/known_hosts again. Now I can log in via SSH without problems. However, the connection dies with a "Write failed: Broken pipe" error every few minutes (as opposed to the other two machines, which stay connected indefinitely).
So my questions are:
1.) why would a power loss affect the behavior of the SSH server?
2.) why do I keep getting broken pipes now?
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Oct 20, 2010
When I use the command df -h on one of our debian linux machines I get back that I have 0 space left on /dev/md0/. I tried to find out where all 60G of space was being used but am unable to find it. Could this reading be wrong? Also, where could this space be being used?
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Feb 28, 2010
I tried playing a DVD several times and each time, after opening in Movie Player on Ubuntu 9.10, it froze up, I forced quit and then I noticed a huge reduction in free disk space on my root (/) directory. Has this happened to anyone else?I figure I Movie Player probably saved some temp files somewhere on hard disk and wasn't able to clean them up since I had to force quit. Any thoughts about how to clean this up and take back that previously free space?
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Jan 12, 2010
i'm not able to play music at all. videos videos seem to crash my browser and using either rhythmbox or banshee they crash too.i ran rhythmbox by typing sudo rhythmbox and tried to play a file and it displayed a pop-up window saying that my autioaudiosink element is missing and the terminal displayed this:
code: (rhythmbox:8415): rhythmbox-warning **: unable to grab media player keys: could not get owner of name 'org.gnome.settingsdaemon': no such name
warning: unhandled message: interface=org.freedesktop.dbus.introspectable, path=/, member=introspect
[code]....
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Aug 18, 2010
We've had a headless server running Ubuntu for a few weeks now and it's been fantastic - we've been able to access it from all of our computers and it's making life so much easier having one central box to put everything in. Until yesterday, where we noticed that some directories on the 1TB HDD were empty that were previously full of files. Restarted and the directories are gone, leaving only the root directories. Restarted again and Ubuntu doesn't even recognise the disk.
We have Ubuntu installed on a 250GB HDD with the 1TB hard drive mounted on (as?) /srv and all of the data is on there. Before Ubuntu stopped recognising the disk it would appear in Disk Utility saying that the file system was corrupted and that there was an issue with the superblock - I've found some ways of attempting to fix that but none are working now that Ubuntu isn't able to find the disk. I've checked the physical connections and they all appear to be working fine. I can hear/feel the hard disk spinning. Some users haven't backed up the files they put on the server so I'd prefer to try anything non-destructive first and save their work. I'm hoping that the HDD hasn't totally died... but now that Ubuntu can't see it I'm concerned that that might be the case.
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Jul 20, 2010
This problem is not exclusive to Ubuntu, I've experienced it in Windows and OSX as well, but it seems that almost every time I transfer a large number of files (i.e. my music collection) between my desktop computer and laptop via my external hard drive, I end up losing files for no reason. I usually don't notice the files are missing until later on, because I am never informed of any data loss. Now, every time I make a large transfer of files, I just do it two or three times to ensure that I don't lose any files.
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Nov 23, 2010
does anyone know of any FOSS program I can use to convert HD X.264 MKV video files to AVI or WMV without loss of quality. I wish to stream these videos from my linux box (yes u can do that via ushare)to my xbox 360 but unfortunaly it wont play MKV files.
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Oct 14, 2009
I have a list of files in a directory which starts with - or have space.
I need to copy them back without the space or -?
linux1[sim]% ls linux1[sim]% cp ./-* ./*
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Apr 15, 2011
How to parse the bunch of values displayed by the socket program into the php file so that further it can be displayed in HTML page
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Sep 8, 2011
I have installed OpenSuse 11.4, KDE 4.6. In konqueror filemanagement I don't get fileproperties when hovering over the files with the mouse. Only right click -> properties will give me the properties. Now properties are not too much a concern but it is the preview I want. Dolphin does give me properties and preview.What can I do to get fileproperties to be displayed while hovering over the files?
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Dec 31, 2010
I have CentOS 5 32 bit and I wish to be able to use Python as it is required by a web script I am installing.The Apache however handles the test Python scripts as text. I have Apache/2.2.3 installed and I followed this tutorial: [URL]installed mod_python, edited the httpd.conf file, restarted the Apache, it restarted ok - no change at all. I tried other suggestions I googled but in vain.
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Jan 28, 2011
I'm having jittery DVD playback, and I don't know what the problem is. I tried switching to metacity, but that didn't help. I tried copying the whole disk to local drive with dvdbackup, but the local files displayed the same effects. I tried mplayer and vlc, but no difference. Totem, however, is really bad with jitters. With totem, I tried checking 'Disable deinterlacing of interlaced videos', which I saw someone recommend in another thread, but that didn't help either. I also have all the codecs from this forum's how-to sticky. A video capture of the jitters while playing with vlc: [URL] I'm using Ubuntu 10.10 Desktop 32-bit.
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Jun 29, 2010
I started my computer and i goto home/downloads. i found all downloaded are deleted. and every folder and file in home folder are displayed in desktop.
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Jul 5, 2011
What my situation was before the problems:
-I dualboot win(xp) and xubuntu(11.04)
-No problems whatsoever except for the fact that power consumption was higher on xubuntu.
Then i read something that said that the kernel i was using was effectively having power issues and that it could be fixed so in went into the terminal and nano'd the grub config file and update-grub'd with the addition i had read all over the internet. When i rebooted it seemingly had worked but once i opened a ..... video it didn't react to anything (i'm 99% sure kernel panic since there was no hdd movement). So i forced it to shutdown and when i got back in again i nano'd the file again but for some reason i didn't only remove the power stuff but I also removed the quiet splash. Once i had rebooted it would suddenly ask for username and password twice.
once the older looking menu an then the newer looking one with the fancy bg). The first time i got in okay but afterwards i could only get in as root. I thought i had simply forgotten my password but i ran passwd myusername as root and it didn't work(only when i typed something random it gave the wrong password message). As root i also can't edit the users and groups(when i open it it stays grayed out). how do i fix this. If i will lose my account anyways then how do i get my files/bookmarks/... of of it.
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Jan 4, 2010
Logical Memory Space of 4GB is divided in to 3GB User Space and 1GB Kernel Space. Always. Correct?
1. How can we change it? (just changing value of PAGE_OFFSET is okay?)
2. If system have only 256MB of memory (embedded system) and suppose Kernel Modules eat away all the memory during boot. User space will be left will no memory. Is this case possible?
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Jan 6, 2011
The following are the output of command "ifconfig -a":
[Code]....
The interface "eth0", which is down, was not displayed, but loopback interface has been displayed. So, how can I make my application display all interfaces, including the interfaces which are down, but excluding the loopback interface?
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Jun 9, 2011
I am running Ubuntu 10.04. I am transferring roughly 62 GB of data libraries to my 84 GB /home partition. I'm using rsync because scp kept stalling, and I had to restart it over and over. Things were going great until recently when it began to show an error: "failed: No space left on device (28)" These are the things I've done so far: Used the GUI to find out how much I have copied so far: 5,149,552 which take up 30.2 GB. df -h, it tells me that my /home partition is 56% used, and that I have 33 GB available. (42 GB used out of 78 GB with 33 GB available) Also, none of my other partitions are anywhere near 100%. the /home partition is the most-used and it's only a little over half-full. du -s in the directory where I'm copying all of this: it also returned 42206500. Additionally, when I try to save screen captures, it sometimes fails with a "device full" error. What's going on? Am I really out of space? Why doesn't it show me that I'm out of space?
Is there a hidden temp file that rsync uses that just got too full? I did a little research on wikipedia and it said that ext4 has a 64,000 directory limit. Could it be that I somehow broke that limit with all of these files? Solution: not enough inodes for the vast amount of subdirectories on hard drive. This wasn't an RSYNC problem, rather, a partition configuration issue. To check inode usage: df -i If you want to add any inodes, you will need to backup your partition and format it using mke2fs (man mke2fs). Be sure to change the respective inode setting.
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Jun 21, 2010
I am using Ubuntu 10.04 64-bit and I purchased a new ALFA AWUS036H wireless card. I would like to know if this "1Watt" wireless card is configured for full power. iwlist wlan0 txpower results:
wlan0 unknown transmit-power information. Current Tx-Power=27 dBm (501 mW). It appears to me that I should be able to increase the power. "iwpriv wlan0 highpower 1" does not work. Do I need to patch the new default driver that comes with Ubuntu 10.04 64-bit with the aircrack one following these directions:[URL]...? Monitor mode and a injection tests seem to work fine with the driver I have installed.
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Aug 3, 2010
If I run low on free space, and I/system need to write something, then the files are just truncated. With no way to revert to their previous content.
First I installed the Windows on the VirtualBox, it sucked up all free space, so I couldn't even login to the system afterwards.
Then I, once again, silently ran out of free space, and my php editor broke. Later I discovered that it tried to write its config files, but failed, truncating them all. I lost a half a year of configurations, custom color scheme and custom code snippets.
Then one day the system just froze. Later I understood, there wasn't enough free space for it to run.
Today I was working on my php script, for like the second day, when, again, free space ran out, so with another file-save, I got a wonderfully impressing blank php-file. It was auto-reloaded from the external change, which was failure to write to file, obviously, so no ctrl-z worked, leaving me with two days work wasted and an urge to hit the monitor
My questions are:
1 How can this be fixed? Besides the obvious awesome fix "watch your free space, buddy".
2 Could somebody explain why these sorts of things happen, just so I know why the ultra-safe and durable 'nix operating system wants to destroy itself sometimes?
3 Anyone else encountered this issue?
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Jan 29, 2009
running ubuntu 8.10 amd64 on my HP intel 2.26ghz dual core processor, 320gb hdd and 4gb ram. My main problem is that when I dual booted ubuntu onto my laptop, I had vista already installed, so I only set aside 20GB of hard disk space for ubuntu, which seems like more than enough to me. What's going on is that it says I have used all my space and only have one GB left, when the only thing I have on my computer are word files and necessary installs like flash player, compiz, avant, etc.When trying to hunt down what was using all my space, first I checked out the disk usage analyzer (some pics from here in):theres my hdd with 1/19 gb remaining here's a breakdown of my home folder, showing that it's not using very much at allhere's my filesystem, now we can see that all the space is being used in the folder: /var
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Nov 19, 2009
I can understand installing so many xorg-x11-drv-* files being installed, especially from a livecd. What I don't understand is why I can't remove the ones for hardware I don't have. For example, if I try to do a yum remove (or use yumex to do so) xorg-x11-drv-cirrus, it wants to remove xorg-x11-drivers.Now I understand that the -drivers file is a way to force all of them to be installed. Will it break anything if I go ahead and remove it along with the extra -drv- files?It is more than an academic exercise. I have installed Fedora 12 Constantine on my EeePC 900. Given the limitation in storage space, I would like to free up as much of it as I can so these superfluous video drivers need to go away. Since I don't want to break my setup in the process, I have not executed the command.
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Oct 23, 2010
I used to have a command that removed the *odd* characters from files and replaced spaces with underscores.
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May 18, 2010
I examined the problem, and determined that a huge amount of disk space is being taken up by files in /var/log/ The following files:
Code:
/var/log/messages.1
/var/log/kern.log.1
/var/log/daemon.log.1
/var/log/messages
/var/log/kern.log
/var/log/daemon.log
/var/log/syslog
are all over 1 GB in size. The largest is 18 GB. Together, they total 48.3 GB. I restarted the system, forcing a fsck.
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