Assume a 8KB block size, 4-byte block numbers, and an inode that contains pointe

Question

Assume a 8KB block size, 4-byte block numbers, and an inode that contains pointers to the first 10 block numbers, an indirect block, and a doubly indirect block. How large can a file be without needing to use the indirect block? How many block numbers can be stored in a single indirect block? How much data does an indirect block point to? How large can a file be without needing to use the double indirect block? And, how do you come up with these answers?

And, given those assumptions, what would be the logical block number and offset within the block for these file offsets: 8188, 8192, and 10000?

Explanation / Answer

The maximum file size =8KB *10 block numbers =80KB.

The number of block numbers =8KB/4byte

                                                =2000

The amount of data pointed by the indirect block is 2000*8KB

                                                                             16000KB

The size of the file without using double indirect block is 16000KB+2000

                                                                                      18000KB.

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