General :: Wanted Safe Way To Fsck (mounted) LVM Partition
Jan 10, 2010
I have two ext3 lv's of 4GB and 10GB in my hda8 partition, and they are automounted by /dev/mapper/ in my /etc/mtab files in each of the four distros (Suse9.3, OpenSuse10.2, kubuntu7.04 and Debian Lenny 5.0.3). Since ext3 is a journalled fs I feel I ought to fsck their integrity every 3 months or so, however I don't know
a) whether they must be unmounted before running fsck,
b) whether I should use a live CD such as knoppix to run the fsck command, and
c) whether I can and/or should run fsck /dev/hda8, or whether I should somehow fsck each lv seperately?
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Apr 4, 2011
I'm running an Acer Aspire 1830T-3721 dual-booting Windows 7 with Ubuntu 10.10 (Desktop).
Background: So first I dropped my laptop a couple feet while Windows was running. The laptop immediately shut off and then tried to boot. Booting Windows results in an unfortunate "Windows has encountered a problem communicating with a device connected to your computer. The error can be caused by ... faulty hardware ... Status: Oxc00000e9 Info: An unexpected I/O error has occurred." But Ubuntu booted fine, and could access my NTFS files fine, so I was trying to work on the problem from there. I try a few utilities, looking at the partition table, etc without actually applying any changes.
Then I run a fsck on the drive. It loudly warns me that if I continue on a mounted drive, then I'm going to mess things up. In a moment of stupidity I push on, thinking that surely it would ask me for more configuration, or confirmation, before actually starting. The fsck runs for about 1 second before I Ctrl-C it, running some preliminary stuff and then just starting pass 1.
After this, Ubuntu won't boot anymore. Instead, it hangs just after the init-bottom script runs. If I boot with init=/bin/bash, I can get to a shell, and see that my file system is still there, but not sure what else to do.
I've been running off of a SysRescCD LiveCD, from which I've looked at the drive with testdisk. Testdisk reports that "the hard disk seems too small" while showing me the partition table.
I ran a fsck on the Linux partition; it fixed a bunch of things. There has been no apparent effect on the boot behavior.
I can access all my files, back them up, and reinstall Ubuntu, but I'm hoping there's a better solution, perhaps one that will also help me repair my Windows installation (but I'm looking at one problem at a time here).
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Nov 12, 2010
I want the filesystem of my external drive to be checked periodically after a numer of mounts. I put 2 in the sixth colums of fstab for this partition
Code:
/dev/sdb1/mnt/hdext3rw,dev,sync,user,noauto,exec,suid02
and I use the tune2fs to set the maximum mount count to 32.
Code:
tune2fs -c 32 /dev/sdb
now the mount count is 34 and the date of the last check is not recent, so apparently the auto fsck has not been performed. Probably because this partition is not mounted at start-up but I usually mount it manually.
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May 12, 2010
I have some large volumes that I don't want to automatically be e2fsck'd when I reboot the server. Is it safe to change maximum mount count to -1 and check interval to 0 while a volume is mounted, or will that cause problems to the file system?
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Apr 22, 2016
How to run a fsck on a mounted drive? I attempted unmount and it said no. I suddenly got an error 4 and trying to run a check, and it aborts with can't cause mounted.
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Aug 6, 2010
My new Debian box is running well and stable enough for me to decide to swipe out WindowsXP altogether. I have a 40GB HDD, which has the following partition scheme (after Windows was removed and hda1 was converted to Linux native type)
Code:
Device Boot Start End Blocks Id System
/dev/hda1 * 1 1762 13313159+ 83 Linux
/dev/hda2 1762 5168 25756889 f W95 Ext'd (LBA)
/dev/hda5 1762 3985 16813408+ b W95 FAT32
/dev/hda6 * 3986 5018 7809448+ 83 Linux
/dev/hda7 5019 5168 1133968+ 82 Linux swap / Solaris
As you can see, my Linux is in the 2nd logical partition hda6 which contained in the extended hda2. The 1st logical partion hda5 is the one I want to erase the data and convert to Linux filesystem in order to have more space. (Yes I can mount it ntfs-3g and use it without any problem, but I just want to say farewell to as many things Microsoft as possible) . What I'm worried about is whether it's safe to do that, without damaging the extented partition which contains the root file system for Debian.
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Jul 6, 2010
I'm using LVM-based partitioning. I can not mount one partition. Here is some information I can provide.
Untitled-1.png
snapshot7.png
snapshot8.png
This incident happened after I try to encrypt this partition and then an error message appears. If not mistaken, it contains an error number (I forget) and a warning which reads that can not remove the LABEL on the devices.
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Feb 1, 2011
Every time I mount one partition manually as read write it works fine for a couple of minutes before reverting to read only. It still appears as read-write when I list the mounted directories but won't let me write to it. I have tried unmounting and remounting it, but after a few minutes it always ends up as read-only again.
$ mount
/dev/sda3 on /scratch type ext3 (rw)
$ mkdir /scratch/file
[code]...
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Jul 17, 2011
I managed to setup an encrypted partition that's mounted on boot using dm-crypt/LUKS.
The relevant entry from my /etc/fstab:
/dev/mapper/st_crypt /media/st ext4 defaults 0 2
The partition is mounted at boot, and I can write to it as root just fine, but I have no idea how to make it writable by a normal user (i.e the users group).
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Aug 17, 2010
using suse 11.3 and kde 4.4.4 on the mounted fat32 partition I cannot change icons partition is mounted in fstab in this way:/dev/sda8/ /dati vfat user, users, gid=users, umask=0002, utf8=true, 0, 0.I can create files folders modify, move and save them on the partition but if I try to change the icon (in dolphin right click>properties>click on icon) of the /eros folder (or any other folder or link) system gives me
this error:impossibile salvare le proprieta' , non hai accesso sufficiente per scrivere su /dati/eros/.directory tha in english is something like this: impossoble save properties, you havent enough permission access to write on /dati/eros/.directory this happen also as superuser I remember that with suse 11.0 or 10.3 I was able to change icons on fat32 partitions, now with 11.3 I cannot, there ought to be a way to do what I did with the previous version with this 11.3 brand new ad more advanced version shouldn't it?
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Feb 5, 2010
Is there a program that will reread the partition table and update the kernel even if one of the unmodified partitions is mounted? I installed my system on one partition, then I added another with free space. Now I want to format the second partition, but the kernel doesn't know about it yet. I tried sfdisk -R /dev/sda, but it refuses while the root partition is mounted. Is there anyway I can avoid rebooting?
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Mar 23, 2010
I have Ubuntu server 8.04. I have 4 hard drives of 149Go each. Size of a mounted partition is smaller thant the partition itself :
- first drive is the system
- I mounted the 2nd drive (ext3) on a folder, but the Size is 941.89 MB instead of 149Go
- same for drive 3 monted on another folder, but the Size is 941.89 MB instead of 149Go
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Jul 22, 2010
Can anybody tell me what kind of fsck errors are found on a system?
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Feb 19, 2010
I have an HP laptop with a recently installed copy of Mint 8 KDE Community Edition. I created the initial admin user account ("joseph") when I installed.
I had an existing home directory under a different name from another installation, so I added a user with that name ("joe") and imported a copy of the original home directory. The user "joe" didn't have the same admin privileges as the initial "joseph" account, so I added "joe" to the sudoers file and the same groups as the initial admin user.
Everything works perfectly under this arrangement, for the most part. Now here's the problem:
I have a T-Mobile G1 phone that uses Android. I've rooted and ROM-modded the G1, and have the microSD card in the phone set up with two partitions. The vfat partition stores all the photos, music and other stuff the phone needs. The ROM mod allows me to store apps on the SD card, so that second partition uses ext3 for its file system.
When I'm logged in as the admin "joseph" account and I insert the SD card in the laptop's card slot (or plug the phone into the USB port), the SD card can be mounted, and I have full access to both card partitions. I can see all folders. I do this to backup the contents of the card to an external drive (especially the apps in the ext3 partition, since that's been trashed on me once before on the phone).
However, when I log in as "joe", I cannot view the contents of the ext3 partition at all. I can see the vfat drive fine, and the ext3 partition mounts, but with user/group "joseph/joseph." When I open Dolphin to view the mounted ext3 partition, I get the error "could not enter folder /media/disk-1" at the bottom of the view window in Dolphin.
Here are the relative entries returned when I run "mount" to view the mounted drives:
/dev/mmcblk0p1 on /media/disk type vfat (rw,nosuid,nodev,uhelper=hal,uid=1001,utf8,shortname=mixed,flush)
/dev/mmcblk0p2 on /media/disk-1 type ext3 (rw,nosuid,nodev,uhelper=hal)
Note that the uid listed on the vfat mount is 1001, which is the gid for the "joe" account.
I know there must be a configuration setting somewhere that will allow the ext3 partition to automount under the "joe" user account. I suppose that using the admin account to change the permissions would be the easy way to do this, but there must be something that would do it automagically. I've ripped through all the config files I can find, but can't seem to find anything that would help.
All I'm looking for here is enough access to be able to copy the directories on that mount to my external drive.
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Mar 21, 2010
My windows partition isn't starting up, gives an error and suggests using chkdsk. However, I cant even reach safe mode or command prompt. I can still access my Windows hard drive through Ubuntu.I am wondering I can use a Linux tool to perform a check on this Windows partition? I found the fsck command, but I am confused about the warning about running it on a mounted system and about what exactly is a mounted system.
Can someone please tell me how exactly I wod go about doing a check on this partition? Its currently located in /media/disk.I can right click on the partition and unmount it. But if I do this, will Ubuntu still be able to see this partition?What command do I use to do fsck only on this Windows partition (and not the whole system and other mounted places)? How do I remount the Windows partition so that I can atleast salvage my data easily in case doing a disk check does not help?
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Nov 25, 2009
I got 2 HDDs, I had created LVM by two of them. When I was trying to install quota it was saying it is better if you run fsck first message. When I tried to run fsck. It warned me that I could lose some of my data. So it happened. Actually it is worse: I can't boot my Fedora 11. When I try to run installer in rescue mode, it says no linux partition find. When I try to install (just to see partitions) it shows LVM volumes of hdds are ok but the partition which is / (root)partition seems in unknown format. How can I save my datas? Or can i restore my partitions, LVM?
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Sep 15, 2010
Got tired of long waits for fsck on very large partitions.Here's a script to fsck selected partitions every 'N' shutdowns. No more boot delays for fsck (unless something is really wrong
Update1: On my system '/usr/libexec/gam_server' (gamin component used by xfce) prevented /home from being unmounted. I changed
Code:
[code]...
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Sep 25, 2009
When I do a forced fsck, I would like to have a log file to look at after boot.
When I check /var/log/ there are no files there with fsck output
I've run force fsck in these ways:
shutdown -rF now
-and-
touch /forcefsck
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Jan 26, 2010
i want to ask is it safe to ad more space to my root partition with gparted ?I ask friends and they all told me if i change the root partition is possible to have problems to start my Debian.
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Oct 1, 2010
What will be an easy and safe way to resize partition? Boot up the LiveCD? Or can I run resize2fs while OS is running?This is a newly installed box without files on /kvm. Now I want to resize /home taking up the complete capacity of /kvm which will be removed/deleted.
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Aug 4, 2010
Are there any bad effects of resizing a partition? (like loss of data).
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Sep 6, 2010
I am currently using Ubuntu Studio 9.10 in dual boot with xp and wondering if it's safe to shrink ubuntu partition and expand swap partition without messing up boot sequence and grub.
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Mar 2, 2011
Using gparted as shown on the partitions in the image:
sda1 is Windows 7
sda2 is swap
sda3 is root
sda4 is home
I'd like to move sda4 to the end of the drive, thus shrinking it by 20GB, and shunt every other partition along to make an extra 20GB for sda1 at the start of the drive, and expand this partition into the 20GB of space I created.
When I start moving and shrinking sda4 (before I apply and execute the command) I get a warning saying that it is very dangerous to move a boot partition and it could render my system unbootable etc etc.
How safe is it to do this? If I bork it, can I recover easily?
I assume the error has something to do with start/end disk sectors in the grub2 list (however this works these days). In short, messages like this do what they should and scare me just enough to seek assistance from this wonderful online community!
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Aug 10, 2010
suppose an Ubuntu or Linux user is using GNOME and he/she has opened too many folders , suddenly he/she has to shutdown/ switch off machine due to power failure or some other unexpected reasons , now when he/she reboots the machine he/she can't remember the folders he/she had opened earlier so there should be a window restore feature for nautilus in Ubuntu or Linux in general Ubuntu or Linux should implement the same window restore feature in nautilus similar to the one existing in Mozilla firefox see the screen shot here:- [URL]
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Nov 8, 2010
i'm running out of partitions, i was thinking if i could get rid of the windows system reserved partition without messing any of my windows 7 OS & the recovering partition. I'm currently using grub2 to boot ubuntu & win 7.
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Mar 4, 2011
Is it safe to resize a partition which is marked as a boot partition?Is it just a flag i can ignore?I have ubuntu in an extended partition, the previous partition I've formatted and want to shrink/then move+resize the extended partition to give ubuntu more space.
I was about to resize+move from the gparted usb, when it warned moving a boot partition can cause your system not to start....I've already created 97gb unallocated space (probably too much) and sda3 is flagged as boot even though it's a formatted empty partition. If I'm trying to move/expand sda4 is the warning because of the boot partition on sda4, the facts sda3 is flagged as boot or because the grub stage 2 file is being moved?
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Mar 13, 2010
Long story short, my Windows had a fatal crash the other day and since I couldn't find the installation disk, I burned the Ubuntu 9.10 disk image to a CD at a friend's place and installed it on one partition of the hard drive. The other partition contained tons of Windows programs and documents in an NTFS system. Ubuntu is cool and all, but when I finally found the Windows disk, I wanted to reinstall it for dual-booting, to use some programs that don't run well in Wine.
To keep some documents safe and not waste any CDs, I moved them over to the Ubuntu partition before installing Windows. As experienced ubuntuists know, the slightly clumsy Windows installer erases GRUB in the process, and it's recommended to install Windows first. So, now I ended up with a working Windows partition and an Ubuntu partition with all of the stored data, which I can access via guest status with the burned CD.
Here's the catch though - as a guest and without Linux properly installed I can't move anything I moved to the Linux partition from the Windows partition back anymore. All the folders have a little X on their top corner. I'd be glad to reinstall Ubuntu now, but I must know how to keep all that tranferred data safe. Can I keep it there during the reinstallation? Should I install Wubi on Windows and access the stuff through it?
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Sep 2, 2010
My Windows XP Pro laptop has been attacked! Windows will no longer update and Microsoft Security Essentials will not update either. I've been trying to resolve the issue for over two weeks with Microsoft support, but it's just taking too long. I also tried some rescue CD options (all running some form of Linux, obviously):
- BitDefender Rescue CD (removed infections, now detects nothing),
- Kaspersky Rescue CD 10 (removed infections, now detects nothing),
- Trinity Rescue CD (won't load AV Engine, so can't use it to do anything).
Malwarebytes cleaned a bunch of stuff, but will not clean the final threat detected (it's supposed to get deleted on reboot, but never does). Hijack.FolderOptions is stuck in the accursed registry, and it keeps causing Windows Explorer to crash. I cannot rename files or work with them or everything just crashes.
So I'm ready to reinstall XP from scratch, and add a dual boot with Xubuntu & LXDE, which I'm already running on a much older laptop.
Question: I want to rescue the files I need. My idea was:
1) Install Xubuntu with dual boot.
2) Copy over files from Windows XP partition using Xubuntu.
3) Back up files to an external drive using Xubuntu.
4) Reinstall XP Pro and format hard drive.
5) Reinstall Xubuntu with dual boot.
6) Use Xubuntu for daily use.
7) Only use XP for those tasks that require it (TomTom updates ...)
Should I be concerned about the security risk from copying files from the Windows partition to the Xubuntu partition, and from there onto an external hard drive?
Is this the way to do it, or is there a better way? I just want my laptop back in working order. Right now I can't use it for anything.
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Mar 6, 2010
I've initialize a virtual disk and deleted the partition table didn't notice that i've done that to the wrong one, data still on the physical hard disks but....how I'll get my data back safe without losing it?
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Jul 22, 2011
So the first 10Gb of a 450GB NTFS partition have just accidently been written over with an Ext4 filesystem that spans the entire partition instead. all foolishness asside, what can be repaired. Now I know Ext4 likes to jot bits of meta-data down (inodes blocks) along the way, and this can be about 5% of drive capacity, that said, there's alot of small text files and stuff, coe files so forth that can surely be recovered
I've looked into magicrescue and testdisk, but they fall into the only two groups to exist:
1) Filesystem independent, that is search almost like a patern - well exactly like a pattern match, to find the header and footer of files.
2) Filesystem recovery tools, like, damaged bootsector, so forth
I need one, that will be able to extract files, Iunderstand this will be a hard task, but.... text files; surely that'll be easy, anyway. This is my backup drive, they''re both WD you see, anyway. This is important, given the coding is ASCII surely.
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