Suppose a file is on a filesystem using a 1K block size. This file is maintained on the disk using i-nodes as is typical on many UNIX filesystems (as described on pages 286-287 and 789-790 of your text). Suppose there are seven direct pointers, and then a pointer to one singly direct block, a pointer to a doubly indirect block, and a pointer to a triply indirect block. Suppose a program creates and opens a file in this filesystem, and then seeks to the following positions, writes a character, and then exits. Identify how many disk blocks, (both data and indirect blocks) must be allocated to store the data for the file. (Note that a-c each represent a different file.) a. Seek to 9000 b. Seek to 300000 c. Seek to 67,000,000 How big would a file need to be to require the triply indirect pointer?
Minix
Suppose a file is on a filesystem using a 1K block size. This file is maintained on the
disk using i-nodes as is typical on many UNIX filesystems (as described on pages 286-287 and
789-790 of your text). Suppose there are seven direct pointers, and then a pointer to one singly
direct block, a pointer to a doubly indirect block, and a pointer to a triply indirect block. Suppose a
program creates and opens a file in this filesystem, and then seeks to the following positions,
writes a character, and then exits. Identify how many disk blocks, (both data and indirect blocks)
must be allocated to store the data for the file. (Note that a-c each represent a different file.)
a. Seek to 9000
b. Seek to 300000
c. Seek to 67,000,000
How big would a file need to be to require the triply indirect pointer?
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