Block Group Descriptor Leads to Data Loss in Linux

Sandisk 4GB Secure Digital SD HC Memory Card (SDSDB-4096, BULK, No Reader)Linux tutorials, computer hardwareExt2 is widely used and powerful file system of Linux operating system. It provides high-level security, reliability, and data management. Space in the Ext2 file system is split into block, and managed into the block groups, correspondent to the cylinder groups in UFS (Unix File System). Every Block Groups contains a data structure that describes it, known as Block Group Descriptors. However, in case of corruption to the BGD, you may come across file system corruption and data loss in Linux. In such circumstances, you need to opt for Linux Data Recovery solutions to get your precious data back.

File system use Block Group Descriptors for reducing external fragmentation and minimizing the amount of disk seeks while reading large amounts of the sequential data. Every block group might have a copy of block group descriptor table and superblock. All block groups have following information:

- Block Bitmap
- Inode Bitmap
- Superblock
- Inode Table
- Data Blocks

The block groups descriptor contains location of block bitmap, the inode bitmap, and start of inode table for each BG and they are stored in the group descriptor table. It creates copy of BG Descriptor, excluding its components, which are used by the operating system and file system for accessing stored data from Linux hard drive.

Because of increased use and complexity of the BGD, there are strong chances of failure. In some situations, when you attempt to access any specific file or directory from the Linux hard drive, you may come across any of the below error message:

- "Inode entry of the file is deleted"
- "File not found"
- "File < file name > is inaccessible"

Such error message occurs due to corruption to the BGD. The corruption may occur due to numerous reasons such as registry file deletion, virus infection, and software conflicts. In such cases, operating system can not locate required files and thus you come across data loss situations. At this point, Linux Recovery is required to get your mission-critical data back.

Data Recovery Linux is best possible with the help of powerful and advanced third-party applications, known as Ext2 Recovery software. They use efficient scanning techniques to carry out in-depth scan of entire storage media and extract all lost, missing, and inaccessible files from it.

Stellar Phoenix Linux Data Recovery is the most commanding application to recover data in all possible data loss situations. It recovers data from Ext4, Ext3, Ext2, FAT16, and FAT32 file system volumes. The software works well with all major distributions of Linux operating system including Red Hat, SUSE, Debian, and Fedora.

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