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If some elements of this chain are removed, there are chances that the data recovery tool won’t be able to find the path to your data. That is why the data is stored in its leaves, and in order to access the information, a data recovery tool has to go down the chain of links before restoring any data. Blocks allocated for extension of B-trees.Information on allocated and free inodes.The Allocation Group is divided into four kinds of structures: The Allocation Group zero (together with superblock zero) are located at the beginning of the disk. Allocation Group structureĪt least the first two kilobytes of every Allocation Group have the same format. The size, number and other characteristics of Allocation Groups are found in the superblock, and this block is located at the beginning of every Allocation Group (just as it is in Ext2).
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