CentOS 5 :: Recover SAN GFS2 Partition After Kickstarting Connected Server With Clearpart Enabled
Apr 17, 2009
I'm trying to recover a GFS2 partition on a SAN that was connected to a server that was recently kickstarted with the "clearpart -all -initlabel". Is this possible? The volumes are quite large (20TB). I'm currently in the process of using parted's rescue feature but so far that has been unsuccessful.
Here's some output from my system:
Number Start End Size File system Name Flags
Nothing?
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Aug 13, 2010
Has anyone successfully kickstarted a rhel/fedora/centos over HTTPS ? In other words, is it possible to do the rhel/fedora/centos install from running apache with SSL enabled?
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Feb 19, 2010
I have lack of understanding of CentOS in general. I have looked for a remedy on other forums and google, but haven't been able to find the answer. I have a 3 node cluster that was functioning great until I decided to go offline for awhile. My config is as follows:
node 2: vh1
node 3: vh2
node 4: vh6
All nodes connect to a common shared area on an iscsi device (vguests_root)
Currently vh2 and vh6 connect great, however since putting the machines back online I can no longer connect with vh1. A dmesg command on vh1 reveals the following:
GFS2: fsid=: Trying to join cluster "lock_dlm", "Cluster1:vguest_roots"
GFS2: fsid=Cluster1:vguest_roots.2: Joined cluster. Now mounting FS...
GFS2: fsid=Cluster1:vguest_roots.2: can't mount journal #2
GFS2: fsid=Cluster1:vguest_roots.2: there are only 2 journals (0 - 1) .....
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Oct 18, 2010
I have installed CentOS and Redhat5 on a LVM partition and selinux is enabled. Both OS's share the same /home partition with one user with the same login(gc) and same uid (1000). The problem I am having is that gc can login with all permissions etc on the OS that was installed first (CentOS). For the redhat OS gc can login but cannot write to the home directory (or startx since X needs to write to Xauthority)Here are outputs - 1st CentOS
[gc@shuttle ~]$ ll -Zd $HOME
drwx------ gc gc system_ubject_r:unlabeled_t /home/gc
[gc@shuttle ~]$ stat $HOME
[code]....
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Jul 4, 2009
I need to mount a bsd/386 partition on my hard drive to recover data. I am running the latest CentOS 5.3, downloaded and installed in the last week.My searches have turned up a mount command, that does not work.
[root@new-host-2 ~]# mount -t ufs -o fstype=444bsd /dev/sda3 /mnt/bsd
mount: unknown filesystem type 'ufs'
[root@new-host-2 ~]# mount /dev/sda3 /mnt/bsd
[code]...
So, is there a patch to get mount -t ufs working?is there a patch to get bsd/386 filesystem type? have not build a kernel before, so I would like to avoid that, but I will attempt it if I have no other options.
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Nov 2, 2010
I am getting frustrated to the fact that I am in charge of developing a Enterprise class solution for my company and I don't find the right answer on the WWW. I have 3 mail servers that I want them to share a Global File System (GFS) that will be mounted via ISCSI on a RAID1+0 SAN Md3000i device. All the documentation that RHEL offers include the setup of DRDB or VLS Clustering.
My intentions are not to setup clustering on these servers, at least for now, however I want them to share access to the same block device, giving enough write/read access throughput . My question is, have you done something like this ? Do you know of any good Tutorial that you tried, and worked for you ?
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Feb 10, 2011
I am using CentOS 5.5.I suppose this is an oft repeated question. I accidentally deleted, using rm command, 2 wmv files. The files were in a single ext3 1Tb drive, with just 1 partition --- the ext3 one. Each file is 600 - 800mb. The 1Tb drive has only about 20Gb data.Immediately after deleting the files i unmounted the drive (/dev/sdc1). Thereafter i searched the the net and came to know of the recovery tools foremost and photorec. I have installed both of them. I am currently running both of them as root --- foremost is just showing a lot of * signs on the terminal and photorec has managed to find some txt and png files --- but no wmv.For foremost i used: /usr/sbin/foremost -t wmv -i /dev/sdc1For photorec i followed some instructions available on the web.
In the meantime, based on some post on the net i ran debugfs as root, then cd into the directory where the files were deleted. Then on typing ls -d i managed to get the inodes of the 2 deleted files and the names of the deleted files are also correct. The instructions on the net http://www.theavidcoder.com/?p=3 tell me to run fsstat and dls both of which i am unable to find in /bin, /usr/bin, /usr/sbin and /sbin. So i am unable to proceed further.
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Jun 12, 2010
I have configured the RHEL cluster suite in RHEL 5.3 64 bit, I have formatted a storage 100 GB LVM with GFS2 filesystem with lock_dlm protocol default journel I have used 8 I have also added this filesystem in cluster resource in GFS resource option, all work fine cluster is able to remount this GFS2 LVM on another node in time of failover. But when I was checking cluster configuration file (/etc/cluster/cluster.conf) in resource syntex it was showing fs_type=gfs so my query is if it uses fs_type=gfs then is it also mount my formatted gfs2 lvm as gfs filesystem in my cluster node rather then gfs2 filesystem. Also how do i check that mounted filesystem is gfs or gfs2, Please clear my doubt.
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Aug 26, 2009
I have a centos server (5.3). I installed WebMin to assist with some of the administration details. In any event, I got it installed but I cannot access it (it requires a secure connection).
I checked out the server and it does not respond to a HTTPS:// request. When I telnet into port 80, it responds but it does not respond on port 443. MOD_SSL is installed and there is an ssl.conf (unmodified).
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Oct 23, 2009
The nagios admin interface apparently needs php (although, of course, the howto mentions nothing of the sort). So then, I copied the php.conf that had at some time been installed on the system, and then moved by me out of /etc/httpd/conf.d, back into conf.d. It's a fairly simple one:
#
# PHP is an HTML-embedded scripting language which attempts to make it
# easy for developers to write dynamically generated webpages.
#
LoadModule php5_module modules/libphp5.so
[Code]....
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Jul 28, 2010
I have xen kernel on a 5.4_64 though it seems to have always done this regardless of version. When I add a virt the control set shows the total machine memory minus what I just allocated to the new virt. This also shows up in the system monitor as total available ram. Problem arises in deleting and making new virts. The memory never reappears as usable after deleting virts. So now after testing several different setups I'm down to 1.4 gigs showing available on the dom0. What can I do to recover this lost memory? I've searched, read, looked every where I could think of and there just doesn't seem to be any information about deleting virts only adding them.
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Feb 17, 2010
I have installed a centos 5.4 server with Bind services running on the 2 servers.but getiing error "the working directory is not writable". while restarting the named services.
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Jan 12, 2010
how to install CentOS VPN Server that can be connect from Microsoft Windows?
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Jun 24, 2009
I try to set up a 5 nodes cluster and a shared Coraid Storage with conga but it fails with "Shared Storage Support" checked.The message is:'A problem occurred when installing packages: Packages of set "Clustered Storage" are not present in available repository' and it is shown under every node on the next sceen after I submit.The pc where conga runs is on the same subnet (192.168.xxx.xxx) and it has the same /etc/hosts of the other nodes.In that pc runs a proxy too and the nodes go out through it (that pc has 2 NICs)Every node (2.6.18-128.1.14.el5-xen-x86_64) is patched whith the last yum update (this morning) the same is for the pc (2.6.18-128.1.14.el5).Every node has 4 NICs , 2 NICc towards the storage the others in bonding towards the WAN.Every node is exactly alike, they have been installed with the ks.cfg generated from the first node and they all have the support for Clustering, Virtualization, and Clustered Storage.
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Jul 16, 2011
How can I increase the size of a server partition as /dev/loop0
Disk informationDeviceMount pointUsage
/dev/loop0/var/tmp2% (11,070 of 495,844)
/dev/sda1/46% (100,819,056 of 233,872,292)
/usr/tmpDSK/tmp3% (11,070 of 495,844)
I use
WHM 11.30.1 (build 4)
CENTOS 5.6 i686 standard on ds-59085
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Oct 22, 2010
I deleted Ubuntu partition from Windows and it deleted one of the LOgical partition(used for Data storage) along with it.Anny ideas how to recover that Logical partition?Windows disk manager now displays that partition as 'FRee Space'
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Nov 3, 2010
I recently had to install ubuntu 10.10 through wubi because my olde ubuntu broke after a failed upgrade. Now I am quite happy with everything in 10.10 except I can't get to the files in my olde home folder because I chose the home folder encryption option in the installation process. How can I recover my home folder? They all seemed to be recovering from another user not another partition.
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Nov 29, 2010
I need a way to recover my Windows partition that was completely repartitioned when I originally moved to Ubuntu.
When I first moved to Ubuntu 8.04, I somehow overwrote my Windows partition. It happened on a laptop and since then, I've purchased a new one so I can now go back and attempt to unzip the partition holding 10.04 and get to the files I had under Windows.
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Jan 16, 2011
Well, my laptop slid off my couch and crashed down onto hardwood floor. The hard drive is shot. I was using grub and had both ubuntu 10.10 and windows 7 on it. Can't load either OS.
What options do I have for trying to recover data off the ubuntu partition? I tried loading livecd...for some reason, it won't work. Does livecd require a working harddisk?
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Jun 14, 2011
I was trying to resize to the left the sdb5 partition where ubuntu is/was installed and things got messy. I lost the partition it was unallocated. Next "cleverly" used livecd and reinstall ubuntu (thinking it was just like a repair the system thing) but instead ubuntu install from new...all my data is lost...gone with the wind. I try sadly enough testdisk but it says partition corrupted impossible to recover. Now the whole disk shows as unallocated in gparted.
I am running ubuntu from a second hard drive and strange enough my windows 7 partition with files is save and sound. I wonder if there is anything I can do to recover my files (guess the enitre partition now is lost). I try photorec and no files were able to recover then try scalpel and it says files were not find or couldn't read the partition. Of course "cleverly" I didn't had a recent back up of my files. Now I cant access the new ubuntu partition that still in sdb5 at boot takes me directly to windows 7.
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Aug 27, 2009
Well i have an 20GB HDD (/dev/sdb) formated with ext4 and has very important files on it .All of sudden something went wrong and the 20GB partition has been lost . Now how do i have to recover that partition and primarily recover those files . Gparted shows no partition on it but unpartitioned space .
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Apr 4, 2010
I have deleted the ubuntu partition on my xp pc. Now at restart i have the following:
GRUB loading.
error: no such partition
grub rescue>
I have no idea what to do now. I have downloaded super grub - because one of the pages that i googled said it would help - but my pc does not read from either the cd or usb drives - don't know why.I need this pc recovered today .
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Sep 13, 2010
Just now I accidentally used gparted and wiped the partition table on my main hard drive, and now fdisk -l shows nothing! How can i recover my partitions and avoid having to reinstall Gentoo all over again?
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May 10, 2010
I have some problems with LVM partition.We have suse linux 9 on our FTP server. After crashing our power supply we face some problem with our hard disks.We have 3 hard disks on our system, one is 80 G and two are 250 G. The Os is installed on 80G hard disk and 250G hard disk has LVM partition.After fixing the power supply, the Os is booted but LVM partitions are not mounted automatically.After researching on the web, I found a lot of article about LVM partitions but I want to recover my LVM partition.
1)What should I do to be able to mount my LVM partition and recover my data.
2)Can I mount this LVM partition on another system. I mean I have connected one of 250G hard disks to usb port, and yast detect this hard disk. Of course on the main system it was detected, too.
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Aug 25, 2011
I was trying to create a centos box with xfs partition,how can we install centos enabling the partion with xfs filesystem. rather than doing after installation.
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Apr 14, 2011
Accidentally, I deleted my '/etc' & '/bin' folder (i know, my fault). Then, I boot liveCD and tried to copy or fix this issue. And then when I can't figure nothing to fix it, I don't know why, I want install system on my existing system, and I thought that new installation don't touch and change my /home folder. And this step Was my biggest mistake, after this I get raw /home partition without my data. Now, I'm trying recovery my data from /home, and I don't know how do this. I'm using program testdisk but I don't know how it work with lvm and ext4. Can I recover content of '/home' or it's impossible?
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Mar 10, 2010
I have reinstalled the suse and am unable to get "lvm info".........am very upset and is running server. how i can get lvm back, i did not format those drive and they are different storages from server.
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Jul 21, 2011
I've formated partition to empty - only erased information that partition is NTFS.
Partition data haven't been changed. So i think only little change to partition table is required.
How can i recover it?
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Jan 20, 2010
I deleted my hard disk , where I had a triple boot of vista, ubuntu and kubuntu after hours of work , I was not able to recover my ubuntu partition and lost everything .Now I need to recover some of my partitions .I am running a live cd
The output of fdisk -l is
How to use parted to rescue my partition , gparted shows the enitre disk as unallocated.
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Jan 21, 2010
I was using testdisk to recover one of my lost partition and when I rebooted my system it says , "error unknown filesystem ".I am giving a screenshot of gparted
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