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File Systems

File Allocation Methods

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File Allocation Methods

File Allocation Methods

1. Contiguous Allocation

Pros: Fast sequential & random access

Cons: External fragmentation, file growth difficult

2. Linked Allocation

Pros: No external fragmentation, easy growth

Cons: No random access, pointer overhead

3. Indexed Allocation

Pros: Random access, no external fragmentation

Cons: Index block overhead

Unix Inode (Combined)