Suppose we have a magnetic disk with the following parameters: Average seek time = 5 ms...
Suppose we have a magnetic disk with the following parameters:
- Average seek time = 5 ms
- Rotation rate = 7200 RPM
- Transfer rate = 150 MB/second
- Sector size = 512 bytes
[8 points] What is the average time to read a single sector? Hint: read pages 382-383 in the text.
Homework Answers
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Suppose we have a magnetic disk with the following
parameters:
Average seek time = 5 ms...
Suppose we have a magnetic disk with the following parameters: • Average seek time = 5...
Suppose we have a magnetic disk with the following parameters: • Average seek time = 5 ms • Rotation rate = 7200 RPM • Transfer rate = 150 MB/second • Sector size = 512 bytes What is the average time to read a single sector? Please DO NOT answer the question if you going to copy the answer from somewhere. If you don't know the answer let someone who knows the answer to reply. Thank you!
Suppose we have a magnetic disk with the following parameters : • Average seek time =...
Suppose we have a magnetic disk with the following parameters : • Average seek time = 6 ms • Rotation rate = 5400 RPM • Transfer rate = 100 MB/second • Sector size = 512 bytes What is the average time to read a single sector?
A given disk drive has the following parameters: Average seek time of 7 ms Rotates at...
A given disk drive has the following parameters: Average seek time of 7 ms Rotates at 6000 RPM Transfers data at 100 MB/s What is the average amount of time it takes to read one sector (512 bytes) of data? Your answer should be in seconds to three digits of precision (e.g., X.XXX s).
A given disk drive has the following parameters: Average seek time of 7 ms Rotates at 6000 RPM Transfers data at 100 MB/s What is the average amount of time it takes to read one sector (512 bytes) o...
A given disk drive has the following parameters: Average seek time of 7 ms Rotates at 6000 RPM Transfers data at 100 MB/s What is the average amount of time it takes to read one sector (512 bytes) of data? Your answer should be in seconds to three digits of precision (e.g., X.XXX s).
7. [1+1+1-3 points] Compute the (a) transfer time, (b) average rotational latency, and(c) disk access time for the following input data for a disk? Rotational speed- 7200 rpm, sector size- 0.5 KB...
7. [1+1+1-3 points] Compute the (a) transfer time, (b) average rotational latency, and(c) disk access time for the following input data for a disk? Rotational speed- 7200 rpm, sector size- 0.5 KB, average seek time 5.7 ms, transfer rate 24.5 MB per sec, controller overhead -1 ms
7. [1+1+1-3 points] Compute the (a) transfer time, (b) average rotational latency, and(c) disk access time for the following input data for a disk? Rotational speed- 7200 rpm, sector size- 0.5 KB, average...
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...
A) How long does it take to read 1,056,000 contiguous bytes from a disk with these...
A) How long does it take to read 1,056,000 contiguous bytes from a disk with these specs: Block (sector) size: 512 bytes Sectors per track: 180 IODCU overhead: 1.6 ms Seek time: 11 ms Rotation speed: 12,500 RPM B) A disk has 250 (512 byte) blocks per track and a data transfer rate of 22.4 Megabytes per second. What is the disk's rotational speed in revolutions per minute (RPM)?
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?
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,...
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...
7. [1+1+1-3 points] Compute the (a) transfer time, (b) average rotational latency, and(c) disk access time for the following input data for a disk? Rotational speed- 7200 rpm, sector size- 0.5 KB, average seek time 5.7 ms, transfer rate 24.5 MB per sec, controller overhead -1 ms
7. [1+1+1-3 points] Compute the (a) transfer time, (b) average rotational latency, and(c) disk access time for the following input data for a disk? Rotational speed- 7200 rpm, sector size- 0.5 KB, average...
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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