April 05 2011

Incorrect Application of dd Command May Cause Data loss in Linux

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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.

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January 30 2011

Improper Use of Fdisk and dd command May Cause Data Loss in Linux

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The hard drives can be divided in one or more parts, known as partitions. The division of hard drive is described in partition table, stored in sector 0 of hard drive. Linux operating system requires at least one hard drive partition, namely for the root file system. It may use the swap files and swap partitions, however the latter are quite efficient. Thus, generally you may want second Linux hard drive partition devoted as the swap partitions. In some cases, improper use of hard drive management tools can cause data loss and need Linux Data Recovery to be sorted out.

On the Intel hardware, the BIOS (Basic Input/Output System) that boots up your system and can generally only access first 1024 cylinders of hard drive. Due to the same, you may need to create third hard drive partitions if your hard drive is large in size. This partitions is generally mounted on the /boot , for storing kernel image and some auxiliary files required at boot time, so that BIOS can access them.

You can create the manipulate the partition table in Linux using a menu drive program, known as fdisk. However, this tool can not understand the GPT (GUID Partition Table) and is not work with large partitions. Fdisk understands DOS partition table and BSD/SUN disklabels.

The Fdisk automatically obtains the hard drive geometry, if possible. It is not inevitably physical disk geometry (as modern hard drive don’t actually have physical geometry), but is disk geometry that is used for DOS type partition tables.

Generally everything works fine if only the Linux operating system is installed on your drive. But, in dual-boot configuration, you should let the Fdisk from other operating system create at least one partitions. While booting the Linux operating system, it considers partition table and attempts to derive what geometry is needed for effective cooperation with another operating system.

Before you proceed for any operation on your hard drive, it is recommended to create complete backup of your significant data. When you backup data using dd command, you need to be careful. A minor mistake may cause severe data loss and need Data Recovery Linux to be handled.

Linux Data Recovery is possible with the help of powerful third-party tools, known as Linux Recovery Software. The applications are particularly designed to carry out thorough scan of the drive and extract lost, missing, and inaccessible data from it.

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

November 17 2010

Improper Use of Fdisk and dd command May Cause Data Loss in Linux

Tagged Under : , , , , , , , , , , , , , , , , , , , , , , , , , ,

The hard drives can be divided in one or more parts, known as partitions. The division of hard drive is described in partition table, stored in sector 0 of hard drive. Linux operating system requires at least one hard drive partition, namely for the root file system. It may use the swap files and swap partitions, however the latter are quite efficient. Thus, generally you may want second Linux hard drive partition devoted as the swap partitions. In some cases, improper use of hard drive management tools can cause data loss and need Linux Data Recovery to be sorted out.

On the Intel hardware, the BIOS (Basic Input/Output System) that boots up your system and can generally only access first 1024 cylinders of hard drive. Due to the same, you may need to create third hard drive partitions if your hard drive is large in size. This partitions is generally mounted on the /boot , for storing kernel image and some auxiliary files required at boot time, so that BIOS can access them.

You can create the manipulate the partition table in Linux using a menu drive program, known as fdisk. However, this tool can not understand the GPT (GUID Partition Table) and is not work with large partitions. Fdisk understands DOS partition table and BSD/SUN disklabels.

The Fdisk automatically obtains the hard drive geometry, if possible. It is not inevitably physical disk geometry (as modern hard drive don’t actually have physical geometry), but is disk geometry that is used for DOS type partition tables.

Generally everything works fine if only the Linux operating system is installed on your drive. But, in dual-boot configuration, you should let the Fdisk from other operating system create at least one partitions. While booting the Linux operating system, it considers partition table and attempts to derive what geometry is needed for effective cooperation with another operating system.

Before you proceed for any operation on your hard drive, it is recommended to create complete backup of your significant data. When you backup data using dd command, you need to be careful. A minor mistake may cause severe data loss and need Data Recovery Linux to be handled.

Linux Data Recovery is possible with the help of powerful third-party tools, known as Linux Recovery Software. The applications are particularly designed to carry out thorough scan of the drive and extract lost, missing, and inaccessible data from it.

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

Maria peter 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/

July 29 2010

Bad Block At Beginning Of Inode Table May Cause Data Loss In Linux

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Are you unable to mount your Linux hard drive volume? Are you facing superblock, inode, or file system corruption like error messages while booting your Linux system? Such situations are caused by corruption of Linux hard drive metadata structures. This behavior of Linux operating system renders all your significant data inaccessible and leads to significant data loss. In order to get your mission-critical data recovered, you should opt for Linux Data Recovery solutions through reliable tools.

In a practical scenario, you may encounter the below error messages after copying your data through ddrescue command-line tool and running e2fsck utility:

“Superblock has a bad ext3 journal (inode 8).
Clear? Yes”

Or

“/dev/sdf was not cleanly unmounted, check forced.
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Missing ‘..’ in directory inode 1785876.
Fix? Yes

Pass 3: Checking directory connectivity
Root inode is not a directory; aborting.
e2fsck: aborted
fsck.ext2 /dev/sdf failed (status 0×8). Run manually.”

After the above error message, you can not access your precious data from the hard drive. In order to get your lost data back, and to sort out these errors, you should perform Data Recovery Linux.

Resolution

The problem is caused by bad block at the starting of inode table. You can fix the problem by reconstructing root inode. It is quite easy to reconstruct the root inode, however the problem is that root inode needs to be placed at fixed location and currently a bad block is located there.

Forcing the hard drive to use spare block from its pool is possible, however a bad block is often an indicator of the beginning of hard drive crash. Thus, replacing the affected hard drive with new one is the safest way to recover from this situation. Use ‘dd’ command to copy data from old hard drive to new one. Then run e2fsck to create a new root directory on the new hard drive, and shift all the inodes, respectively.

If the above method does not solve your problem, Linux Recovery applications perform absolute recovery. They use high-end scanning techniques to methodically scan the entire hard drive and get all your precious data recovered. The Linux Data Recovery software come equipped with simple and rich graphical user interface to enable easy recovery.

Stellar Phoenix Linux Data Recovery is the most effective solution for all logical data loss scenarios. The software recovers Ext4, Ext3, Ext2, FAT12, FAT16, and FAT32 file system volumes. It is compatible with all major distributions of Linux operating system such as Red Hat, Debian, Fedora, SUSE, and Ubuntu.

Maria Peter a student of Mass Communication doing research on Data recovery Linux , Linux Data Recovery software And Ext2 Recovery. she is also a freelancer for http://ext3-file-recovery.data-recovery-linux.com/

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June 21 2010

Incorrect Application of dd Command May Cause Data loss in Linux

Tagged Under : , , , , , , , , , , , , , , , , , , , , , , , , , ,

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.

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