G Assume that a file system has each disk block of size 4KB and each block pointer of 4 bytes. In addition, the each inode in this system has 14 direct pointers, 2 single indirect pointers, 1 double indirect and 1 triple indirect pointer. Ignoring the space for inode, answer the following questions for this file system: (a) What is the maximum possible file size? (b) How much overhead (amount of non-data information) for the maximum file size derived in (a)? (c) How much overhead for a file of size 6GB?

a) 4100.00 GB

b) 4.0039 GB

c) 6291456 B

Explanation:

Given:

14 direct pointers

2 single indirect pointers =

1 double indirect pointer =

1 triple indirect pointer =

a) Let's first find the number of block pointers in one disk block.

Size of disk block / disk block address

A single indirect pointer can address up to 1024 or blocks

The maximum possible file size, will be:

= 4100.00 GB

b) For overhead:

= 4.0039 GB

c) For overhead for a file of 6GB,

we need to check for the required number of block pointers :

The overhead for a file of 6GB will be:

1572864 * 4 =

= 6291456 B

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