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How to Backup in Linux Using Mondoarchive Command

Wednesday, June 11th, 2008

Data loss is a horrible reality and it may occur to any system, nevertheless of the hardware and system configuration. You can prevent such situations by creating a reliable and complete backup of your storage media. In Linux operating system, you can use mondoarchive command for this purpose. If you have a complete backup of your data, you can prevent need of Linux Data Recovery in case of any mishap.

The mondoarchive command backups a subset of all your files, whole file system, or even the images of non-Linux file systems to tape, ISO images, CDs, or an NFS (Network File System) mount. In case of critical data loss situations, you would be able to easily restore all your data and information, taking your system from mere metal state to its original state if required.

This command-line utility provides following two parameters for different operations-

-O: With this parameter mondoarchive backs up entire file system to the CD, ISO image, tape or to NFS volume. A special boot CD or the boot floppies would be created to enable you to restore data from the bare metal if required.

-V: With this parameter mondoarchive command verifies backup against the live Linux file system. The option might be used in the combination with -O parameter for verifying the backup after its creation, or independently to check how much the live Linux file system has modified since backup was created.

You can call the mondoarchive command without flags for making this auto-detect as many configuration settings as possible, ask you for the rest and then create backup and verify the operating system or the subset thereof.
In order to restore data from backup, you can either run the mondorestore from command line or boot your system from emergency floppies/CD generated while backing up the data. The latter would prove helpful if gremlin wipes the drive.

In case if the backup gets damage or the backup media fails, you can not restore data from backup and need to opt for Data Recovery Linux. The Linux Recovery in such situations is possible through third-party applications.
The tools are known as Linux Data Recovery software. They use high-end scanning techniques to methodically scan the entire hard drive and retrieve all of the lost data. With rich graphical user interface and read-only conduct, the utilities are easy and safe to use.

Stellar Phoenix Linux Data Recovery is the most effective and advanced application for absolute recovery of all your lost data. It recovers data from Ext4, Ext3, Ext2, FAT32, FAT16, and FAT12 file system volumes. The software works well with all major distributions of Linux operating system including Fedora, Ubuntu, SUSE, Red Hat, and Debian.

About Author
Allen Sood a student of Mass Communication doing research on Linux Data Recovery and linux recovery software . He is also a freelancer for http://www.data-recovery-linux.com/linux-ext2-ext3-reiserfs-recovery.php

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Posted in Software | 1,341 Comments »

Force Leave Operation With Cman_tool Command Cause Data Loss in Linux

Monday, June 9th, 2008

In Linux operating system-based computer, the Cluster Management tool or Cluster Manager is used to manage the user nodes. This is a command-line or GUI tool, which works on one or multiple cluster nodes. It works together with the cluster management agent. It has various subsystems and CMAN is one of them.
To manage the cluster management subsystem CMAN, cman_tool program is used. But in case if you use incorrect command or switch with this utility, all cluster nodes may get affected and data loss situations arise. In order to retrieve data in these circumstances, Linux Data Recovery solutions are required.

The cman_tool could be used for joining the nodes to cluster, kill another cluster node, change value of the expected votes of cluster, and leave the cluster. You should be careful while using this application and must understand the consequences of commands issued through cman_tool. They might affect all the nodes in cluster. In most of the cases, this program is invoked by the shutdown and startup scripts. The cman_tool uses various subcommands, which include the following:

Join- It is the major use of the cman_tool. This utility instructs cluster manager to try to join the existing cluster or form a new cluster (if there is not existing cluster). If you do not give any option to the command, it would take cluster configuration information from Cluster Configuration System (CCS).

Kill- Tells the CMAN to kill another node in cluster. It would cause local node to send “KILL” message to the node and it would shut down. If the node had failed, recovery would occur.

Leave- Tells the CMAN to leave cluster. You can’t do it if the subsystems (like GFS and DLM) are active. You need to shutdown CLVM and dismount all the GFS

file systems before using the cman_tool leave. Before applying the force command with this option, you should create backup of all your valuable data as it might cause critical data loss situations and need Data Recovery Linux to handle it.

Linux Recovery is potential through powerful third-party applications, known as Linux Data Recovery software. They use extensive scanning techniques to thoroughly scan whole hard drive and extract all of your valuable data in most of the data loss situations. They have simple graphical user interface and thus do not need sound technical skills to retrieve data.

Stellar Phoenix Linux Data Recovery is an effective tool to ensure absolute recovery in the majority of data loss situations. It supports recovery from Ext4,Ext3, Ext2, FAT32, FAT16 and FAT12 file system volumes. The software works well with all major distributions of Linux including SUSE, Red Hat, Mandriva and Ubuntu.

About Author
Allen Sood a student of Mass Communication doing research on Linux Data Recovery software. He is also a freelancer for http://www.data-recovery-linux.com/

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Posted in Software | 456 Comments »

Incorrect Application of dd Command May Cause Data Loss in Linux

Saturday, June 7th, 2008

In Linux computers, dd (data definition) command-line utility offers several advantages such as converting raw data or low-level copying of data from hard drive to any other storage media. The command is used to copy the file system and is capable of copying specified number of data blocks or bytes. Furthermore, this tool allows you to copy data blocks rearwards, so that in case of any problem in block at some point, data that is stored after and before string would be copied. But incorrect use of parameters in this command may lead to serious data loss situations and need Linux Data Recovery to be sorted out.

This is a useful command-line tool in Linux that helps you to carry out quick and easy recovery in case of any damage to your system and data loss. This command enables you to create image of even entire Linux volume and restore it in case of any damage. On new hard drive, target partition is created having same size and structure as of the failed one. Then this utility is used for copying data from source drive.

Although, the process of this command it quite safe and easy, but a minor mistake during operation might cause disastrous situations. Performing low-level operations on hard drive, if the ‘of’ and ‘if’ parameters are get reversed accidentally. This behavior of Linux operating system renders all of your valuable data inaccessible and cause data loss. At this point, you need to perform Linux Recovery by resolving it to access your valuable data.

You much also consider the block size that has to be copied. The cont=noerror, synchronization option that is used to copy data and files, ignores remainder of block and then replaces it with zero bytes. Thus if block size is large, complete Data Recovery Linux could not be guaranteed.

In such situations, you need to methodically scan the entire hard drive using powerful and advanced scanning algorithms. This is best possible using efficient and highly automated third-party Linux Data Recovery software.

The applications come equipped with simple and self-descriptive user interface and thus let you carry out recovery on your own, without demanding sound and prior technical skills. They are built-with read-only and non-destructive conduct and thus do not alter original data on the drive.

Stellar Phoenix Linux Data Recovery is the most effective solution for all your data loss problems. The tool recovers data from all Ext4, Ext3, Ext2, FAT12, FAT16 and FAT32 hard drive volumes. It works well with all major distributions of Linux operating systems including Fedora, Red Hat, Debian, SUSE and Ubuntu.

About Author
Allen a student of Mass Communication doing research on linux recovery software. He is also a freelancer for http://www.data-recovery-linux.com/linux-ext2-ext3-reiserfs-recovery.php

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Posted in Software | 19 Comments »