Ext4 or Fourth Extended file system is latest file system in linux. It is widely adopted as the successor of Ext3 file system as it has a number of powerful advance features. These features improve performs, stability, integrity,security and consistency of our PC. However, in some cases, your Ext4 file system volumes becomes difficult to mount or inaccessible due to Some error in the file system. Such situations cause data loss and need Linux Recovery to be sorted out.
In a practical scenario, you may encounter freezing of the system, while working on your Linux computer. The system may stop responding . At the same time, you can not mount your Ext4 file system volume and the file system looks to be damaged. When you try to mount the Linux volume,below error message is displayed:
A) "mount: wrong fs type, bad option, bad superblock on /dev/sdb1, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so"
When you try dmesg, it gives you further error message:
A) "EXT4-fs: ext4_check_descriptors: Block bitmap for group 0 not in group (block 727012683)! EXT4-fs: group descriptors corrupted!"
At this point, when you run fsck utility to perform linux data recovery by fixing the issue, you encounter a long error that may include messages like:
0) "Inode table for group 0 is not in group. (block 1236188664)
WARNINGS
SEVERE DATA LOSS POSSIBLE. Relocate? No
0) Inode table for group 1 is not in group. (block 600148394)
WARNING: SEVERE DATA LOSS POSSIBLE. Relocate? no"
As stated in the above error message, you may encounter critical data loss conditions if you relocate the Inode table. Backup proves a great help in such situations. However, if the backup is not available or else it is not updated at all, Data recovery Linux Software comes for your rescue.
In a practical scenario, you may encounter freezing of the system, while working on your Linux computer. The system may stop responding . At the same time, you can not mount your Ext4 file system volume and the file system looks to be damaged. When you try to mount the Linux volume,below error message is displayed:
A) "mount: wrong fs type, bad option, bad superblock on /dev/sdb1, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so"
When you try dmesg, it gives you further error message:
A) "EXT4-fs: ext4_check_descriptors: Block bitmap for group 0 not in group (block 727012683)! EXT4-fs: group descriptors corrupted!"
At this point, when you run fsck utility to perform linux data recovery by fixing the issue, you encounter a long error that may include messages like:
0) "Inode table for group 0 is not in group. (block 1236188664)
WARNINGS
SEVERE DATA LOSS POSSIBLE. Relocate? No
0) Inode table for group 1 is not in group. (block 600148394)
WARNING: SEVERE DATA LOSS POSSIBLE. Relocate? no"
As stated in the above error message, you may encounter critical data loss conditions if you relocate the Inode table. Backup proves a great help in such situations. However, if the backup is not available or else it is not updated at all, Data recovery Linux Software comes for your rescue.
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