Homework Answers
Each 16 byte entry in the table is an address of a sector on the disk. The OS can address 65,536 sectors, and the disk has more than that.
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18. (6 points) Consider a FAT-based (File Allocation Table) file system. Entries in the table are...
A system that is using File Allocation Table to index files. Each FAT entry is using...
A system that is using File Allocation Table to index files. Each FAT entry is using 20 bits and each disk block is 8K in size. How many files can be stored in this system? What is the maximum hard drive, this system can support?
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) ad...
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...
Problem 8, chapter 11-I/O Management And Disk Scheduling, Stalling Operating system
Calculate how much disk space (in sectors, tracks, and surfaces) will be requiredto store 300,000 120-byte logical records if the disk is fixed-sector with 512bytes/sector, with 96 sectors/track, 110 tracks per surface, and 8 usable surfaces.Ignore any file header record(s) and track indexes, and assume that records cannotspan two sectors.---------------------------------------------------------------------------------------------------P4Consider the disk system described in Problem 3, and assume that the disk rotatesat 360 rpm. A processor reads one sector from the disk using interrupt-driven I/O,with one interrupt per byte....
Based on the error corretion algorithm discussed in ch6, Assume data are processed in 2048 bits,...
Based on the error corretion algorithm discussed in ch6, Assume data are processed in 2048 bits, in order to perform SEC-DED (single error correction and double error detection), what is the best length of the check bits? Question 5 options: A 13 B 14 C 11 D 12 Question 6 (3 points) Consider a magnetic disk drive with 8 double sided platters, 2000 tracks per disk surface. Each track has a capacity 2048 KBytes. Sector size is 2KBytes. Each disk...
Consider a system where a data files (F_i, and i denotes the file ID) is distributed...
Consider a system where a data files (F_i, and i denotes the file ID) is distributed over a cloud. A data file is generated by an author (AU_k, and k, denotes the author ID) and stored on a distribution server (DS). Only authorized users (US_1, and denotes the user ID) previously registered on the system using their private keys (KPR_1) are allowed to download the data. Users' public certificates (KPU_1) and revocation lists (CRL) are available on a trusted Certificate...
Consider the following system: Byte addressable 16-bit addresses 256B pages Single level Page Table System The...
Consider the following system: Byte addressable 16-bit addresses 256B pages Single level Page Table System The system utilizes a fully-associative TLB with 4 entries and an LRU replacement policy. Given the access pattern and timings below, complete the following table. Assume the TLB begins initially empty and the cache is physically addressed NOTE: Access times are not inclusive and components are accessed sequentially. Time to update the TLB is negligible, everything else that needs to be updated will require a...
Consider the page table shown below for a system with 16-bit virtual and physical addresses and...
Consider the page table shown below for a system with 16-bit virtual and physical addresses and with 4096-byte pages. All numbers below are given in hexadecimal. (A dash for a page frame indicates that the page is not in memory.) Page Number Physical Frame Number 0 - 1 2 2 C 3 A 4 - 5 4 6 3 7 - 8 B 9 0 How many bits are in the offset part of the address? How many hex digits...
11. Consider a file system that uses a structure similar to an i-node with the following...
11. Consider a file system that uses a structure similar to an i-node with the following differences. If the file size is less than 100 bytes, the data is stored directly in the i-node. If it is larger, there are 6 direct links (point to a data block), 1 single-indirect links, 2-double indirect links and 1 triple indirect link. (a) What is the largest file size that can be indexed in this system? Assume the block size is 512 bytes....
6. (10 points Consider a system that has a 30-bit page-number and 128-byte pages. How large...
6. (10 points Consider a system that has a 30-bit page-number and 128-byte pages. How large is the complete page table for such a virtual memory system? What are the tradeoffs involved in having smaller pages versus larger pages?
Problem #1 (25 points) Address Space, Memory Consider a hypothetical 18-bit processor called HYP18 with all...
Problem #1 (25 points) Address Space, Memory Consider a hypothetical 18-bit processor called HYP18 with all registers, including PC and SP, being 18 bits long. The smallest addressable unit in memory is an 8-bit byte. A. (4 points) What is the size of HYP18's address space in bytes and KB? How many address lines does HYP18 require? Address space: Bytes Address space: KB (KiloBytes). Address bus lines: B. (6 points) Assume that first quarter of the address space is dedicated...
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...
Consider a system where a data files (F_i, and i denotes the file ID) is distributed over a cloud. A data file is generated by an author (AU_k, and k, denotes the author ID) and stored on a distribution server (DS). Only authorized users (US_1, and denotes the user ID) previously registered on the system using their private keys (KPR_1) are allowed to download the data. Users' public certificates (KPU_1) and revocation lists (CRL) are available on a trusted Certificate...
Consider the following system: Byte addressable 16-bit addresses 256B pages Single level Page Table System The system utilizes a fully-associative TLB with 4 entries and an LRU replacement policy. Given the access pattern and timings below, complete the following table. Assume the TLB begins initially empty and the cache is physically addressed NOTE: Access times are not inclusive and components are accessed sequentially. Time to update the TLB is negligible, everything else that needs to be updated will require a...
11. Consider a file system that uses a structure similar to an i-node with the following differences. If the file size is less than 100 bytes, the data is stored directly in the i-node. If it is larger, there are 6 direct links (point to a data block), 1 single-indirect links, 2-double indirect links and 1 triple indirect link. (a) What is the largest file size that can be indexed in this system? Assume the block size is 512 bytes....
6. (10 points Consider a system that has a 30-bit page-number and 128-byte pages. How large is the complete page table for such a virtual memory system? What are the tradeoffs involved in having smaller pages versus larger pages?
Problem #1 (25 points) Address Space, Memory Consider a hypothetical 18-bit processor called HYP18 with all registers, including PC and SP, being 18 bits long. The smallest addressable unit in memory is an 8-bit byte. A. (4 points) What is the size of HYP18's address space in bytes and KB? How many address lines does HYP18 require? Address space: Bytes Address space: KB (KiloBytes). Address bus lines: B. (6 points) Assume that first quarter of the address space is dedicated...
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