file system IMP doubt

Question

1.) A file system with 512 GB disk uses a file descriptor with 16 direct block addresses, 1 indirect block address, 1 doubly indirectly block address and 1 triple indirect block addresses. Size of each disk block is 256 bytes and the size of each disk block address is 8 bytes. The maximum possible file size is____________(in MB).  // why ans is 8MB why not 8.26

2,) In a particular Unix OS, each data block is of size 1024 bytes, each node has 10 direct data block addresses and three additional addresses: one for single indirect block, one for double indirect block and one for triple indirect block. Also, each block can contain addresses for 128 blocks. Which one of the following is approximately the maximum size of a file in the file system?

3) Consider a unix file system which uses 12 Direct and a single indirect block pointer for file implementation. Assume that the block size is 4KB and each block can hold 512 block addresses. The maximum size of a file on such a system is ___________ KB.    //  why ans is 2096KB   ,not 80 KB

Comments

for 1) its 8460 KB

3) 12*(2^12)+(2^9)*(2^12)=48+2048=2096 KB

answer depends on whether it is asked in KB or MB

Answer 1

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