Suppose that a file requires 20 blocks to be stored in disk. For each of the following allocation strategies( contiguous, linked, indexed), determine the number of disk block we need to read to bring in block 7 into memory after reading the file’s directory header?
Contiguous Allocation => 1 Block
Linked Allocation => 7 Blocks
Indexed => 2 Blocks
Suppose that a file requires 20 blocks to be stored in disk. For each of the...
How many disk accesses are needed to bring byte i of a file into memory when the file is stored using contiguous allocation? Assume only the file’s FCB is in memory , block pointers require 32 bits , and that blocks hold 4096 bytes each. 3 accesses 1 + [ i/4096] accesses [i/4096 accesses 2 accesses 1 access
Consider a file system on a disk that has both logical and physical block sizes of 512 bytes. Assume that the information about each file is already in memory. For each of the three allocation strategies (contiguous, linked, and indexed), answer these questions: If we are currently at logical block 5 (the last block accessed was blocked 4) and want to access logical block 15, how many physical blocks must be read from the disk?
1 Mark Question Two Consider a file system on a disk that has both logical and physical block sizes of 512 tebytes. Assume that the information about each file is already in memory. For each of the three allocation strategies (contiguous, linked, and indexed), answer these at questions: a. How is the logical-to-physical address mapping accomplished in this system? (For the indexed allocation, assume that a file is always less than 512 blocks long.) b. If we are currently at...
How many disk accesses are needed to bring byte 4090 of a file into memory when the file is stored using double indirect indexed allocation? Assume that only the file's FCB is in memory, block pointers require 32 bits, and that blocks hold 1024 bytes each. How many disk accesses are needed to bring byte 4090 of a file into memory when the file is stored using double indirect indexed allocation? Assume that only the file's FCB is in memory,...
We know that there are different disk allocation methods that help the operating system decide how disk blocks are allocated for files. In the contiguous disk allocation method, each file occupies a set of consecutive addresses on the disk. While this makes file allocation easier, an increase in the file size means that it has to be assigned elsewhere on the disk. The linked disk allocation method requires including a pointer in the current file, which points to the location...
Operating System Problem Three file allocation techniques for storing a file on disk, namely contiguous allocation, linked allocation, and indexed allocation. For each allocation method show how a file of 10 blocks would be allocated on disk. Note that the disk is represented as 30 blocks with blocks 0, 5, 6, 15, 25 already allocated. Note you must show the entire data structure for each allocation method as part of the answer. Thanks
Consider an empty 1 Gbyte disk with the block size of 4096 bytes. When the disk is formatted blocks 0 is occupied for system-related information. The system always allocated free blocks starting st the lowest numbered block, and it uses non-contiguous allocation. Question 6 (2, 4) Consider an empty 1 Gbyte disk with the block size of 4096 bytes. When the disk is formatted blocks 0 is occupied for system-related information. The system always allocates free blocks starting at the...
Suppose we want to read k blocks that are randomly placed/stored in a disk cylinder i. These blocks could be on the same surface or different surfaces of cylinder i. Determine, on average, how far around the track must we go to read these k blocks.
Computer Science Operation System question. I will give thumb up, thank you! Consider a file system that uses inodes to represent files. This file system has 16 direct disk blocks, as well as single, double, and triple indirect disk blocks. This file system is illustrated in the below figure. Please notice that the tables pointed to by the indirect pointers are full sized blocks that only stores pointers. mode owners (2) timestamps (3) size block count data data data direct...
Really don't know what its about... Course in operating system, file system Question 2. File Systems (10 marks) (a) Consider a 32GB hard disk and a FAT file system with 24 bits cluster (block) address. What is the minimum block (cluster) size in order to fully utilize all space in the hard disk? (3 marks) (b) Consider an index-based file system with the inode containing 64 direct pointers, 1 indirect pointer, and 1 double-indirect pointer. Suppose the size of a...