Suppose that you have a UNIX file system where the disk block size is 4096 bytes. Disk addresses and file block pointers take 32 bits (4

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Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Suppose that you have a UNIX file system where the disk block size is 4096 bytes. Disk addresses and file block pointers take 32 bits (4
bytes), and the i-node contains 12 direct pointers, one single-indirect pointer and one double-indirect pointer. Assume an index block is the
same size as a data block (both 4096 Bytes). If there is a file having 50,000 bytes of data and it is never been accessed, we only assume the
file's i-node is in memory, but none of the rest of the file. If the user process wants to access to read the entire file into the memory, how many
1/0 operations would be needed?
O a. 12
O b. 15
О с. 13
O d. 14
Transcribed Image Text:Suppose that you have a UNIX file system where the disk block size is 4096 bytes. Disk addresses and file block pointers take 32 bits (4 bytes), and the i-node contains 12 direct pointers, one single-indirect pointer and one double-indirect pointer. Assume an index block is the same size as a data block (both 4096 Bytes). If there is a file having 50,000 bytes of data and it is never been accessed, we only assume the file's i-node is in memory, but none of the rest of the file. If the user process wants to access to read the entire file into the memory, how many 1/0 operations would be needed? O a. 12 O b. 15 О с. 13 O d. 14
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