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What is the average access time (in milliseconds, to the nearest hundredth of a millisecond) for a hard disk which rota...
What is the average access time (in milliseconds, to the nearest hundredth of a millisecond) for...
What is the average access time (in milliseconds, to the nearest hundredth of a millisecond) for a hard disk which rotates at 5400rpm and has an edge-to-edge seek time of 8ms? (Assume that seek time is proportional to the number of tracks to seek.)
PLEASE SOLVE ONLY 9.13 9.12 IS ONLY GIVEN FOR THE FULL EXPLANATION OF 9.13 9.12 Elementary...
PLEASE SOLVE ONLY 9.13
9.12 IS ONLY GIVEN FOR THE FULL EXPLANATION OF
9.13
9.12 Elementary physics states that when an object is subjected to a constant acceleration a, the relationship between distance d and time t is given by d at2. Suppose that, during a seek, the disk in Exercise 9.11 accelerates the disk arm at a constant rate for the first half of the seek then decelerates the disk arm at the same rate for the second half...
Consider a magnetic disk that has 1,764 cylinders, 500 sectors per track (on average), 0.07 milliseconds...
Consider a magnetic disk that has 1,764 cylinders, 500 sectors per track (on average), 0.07 milliseconds minimum seek time, and 5,376 rpm rotational speed. Assume that the disk heads have a constant speed. Each sector is 512 bytes, and each block is four sectors. What is the average rotational delay in milliseconds (rounded to no decimal places)?
A hard disk has average seek time 9ms, 7200 revolutions per minute, disk transfer rate of...
A hard disk has average seek time 9ms, 7200 revolutions per minute, disk transfer rate of 30 MBytes/sec and controller transfer rate of 500 MBits/sec. What is the average time to read or write a 1KB sector to this hard disk?
(a) Describe the three fundamental ways for performing I/O and compare their advantages and disadvantages. b)...
(a) Describe the three fundamental ways for performing I/O and compare their advantages and disadvantages. b) A hard disk rotates at 15,000 rpm and has 1024 tracks, each with 2048 sectors. It takes 100 ms for the head to cross 1024 racks. Assume that the head is above the innermost track. i. What is the average seek time? ii. What is the average rotational delay (latency)? iii. What is the transfer time for one sector? You can round the result...
single-platter disk
Question DetailsConsider a single-platter disk with the following parameters:rotation speed: 7200 rpm; number of tracks on one side ofplatter:30,000; number of sectors per track:600;seek time: one msfor every hundred tracks traversed. Let the disk receive a requestto access a random sector on a random track and assume the diskhead starts at track0.a) What is the average seek time?b) What is the average rotational latency?c) What is the transfer time for a sector?d) What is the total average time to satisfy...
Consider a demand-paging system with a paging disk that has an average access and transfer time of 20 milliseconds. Addresses are translated through a page table in main memory, with an access time of...
Consider a demand-paging system with a paging disk that has an average access and transfer time of 20 milliseconds. Addresses are translated through a page table in main memory, with an access time of 1 microsecond per memory access. Thus, each memory reference through the page table takes two accesses. To improve this time, we have added an associative memory that reduces access time to one memory reference, if the page-table entry is in the associative memory. Assume that 80...
A hard disk has average seek time of 70 ms, rotation speed of 4150 rpm, and...
A hard disk has average seek time of 70 ms, rotation speed of 4150 rpm, and 333 byte sectors with 55 sectors per track. We need to read a file consisting 130 sectors. Answer the following? Total average access time can be expressed as T a = T s+1/(2r)+b/rN ̈ What is the total file size to be transferred? ̈ What is the total time for the transfer if data is organized sequentially? ̈ What is the total time for...
Consider a single-platter disk with the following parameters: rotation speed: 7200 rpm; number of...
Consider a single-platter disk with the following parameters: rotation speed: 7200 rpm; number of tracks on one side of platter: 30,000; number of sectors per track: 600; seek time: one ms for every hundred tracks traversed. Let the disk receive a request to access a random sector on a random track and assume the disk head starts at track 0. a. What is the average seek time? b. What is the average rotational latency? c. What is the transfer time...
9. a. What are the advantages of using a glass substrate for a magnetic disk? b....
9. a. What are the advantages of using a glass substrate for a magnetic disk? b. How are data written and read onto/from a magnetic disk? c. What common characteristics are shared by all RAID levels? Describe the seven RAID levels with appropriate illustrations. Explain the term striped data. How is redundancy achieved in a RAID system? d. Consider a 4-drive, 200GB-per-drive RAID array. What is the available data storage capacity for each of the RAID levels 0, 1, 3,...
What is the average access time (in milliseconds, to the nearest hundredth of a millisecond) for a hard disk which rotates at 5400rpm and has an edge-to-edge seek time of 8ms? (Assume that seek time is proportional to the number of tracks to seek.)
PLEASE SOLVE ONLY 9.13
9.12 IS ONLY GIVEN FOR THE FULL EXPLANATION OF
9.13
9.12 Elementary physics states that when an object is subjected to a constant acceleration a, the relationship between distance d and time t is given by d at2. Suppose that, during a seek, the disk in Exercise 9.11 accelerates the disk arm at a constant rate for the first half of the seek then decelerates the disk arm at the same rate for the second half...
(a) Describe the three fundamental ways for performing I/O and compare their advantages and disadvantages. b) A hard disk rotates at 15,000 rpm and has 1024 tracks, each with 2048 sectors. It takes 100 ms for the head to cross 1024 racks. Assume that the head is above the innermost track. i. What is the average seek time? ii. What is the average rotational delay (latency)? iii. What is the transfer time for one sector? You can round the result...
9. a. What are the advantages of using a glass substrate for a magnetic disk? b. How are data written and read onto/from a magnetic disk? c. What common characteristics are shared by all RAID levels? Describe the seven RAID levels with appropriate illustrations. Explain the term striped data. How is redundancy achieved in a RAID system? d. Consider a 4-drive, 200GB-per-drive RAID array. What is the available data storage capacity for each of the RAID levels 0, 1, 3,...
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