Pointers

There are two categories of pointers: Direct pointer and indirect pointer.

Direct Pointer

These pointers straight refer to the data Blocks. There are 12 direct pointers which directly reference the data Blocks of a file up to 96Kb.

Indirect Pointer

There are three Categories of indirect pointers. They are described as follows:

Single Indirect

It refers to a File System Block containing pointers to data Blocks. Single Indirect will hold 4-Kbyte data Blocks and it will point up to an additional 8 Mb of data.

Double Indirect

Double Indirect pointers should point up to an additional 16 Gbytes of data.

Triple Indirect

Triple Indirect pointers can refer up to an additional 35 Tbytes of data.