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).
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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...
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).
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?
What is the average I/O time if a 3600-RPM disk transfers an 800 KB block with a 7 ms average see...
What is the average I/O time if a 3600-RPM disk transfers an 800 KB block with a 7 ms average seek time, a 100 MB/sec transfer rate, and a 0.17 ms controller overhead?
1. A hard disk drive transfers data 8 bytes at a time and has a peak data rate of 8 MB/s. To make sure old data is n...
1. A hard disk drive transfers data 8 bytes at a time and has a peak data rate of 8 MB/s. To make sure old data is not overwritten by new data in the device buffer during an input operation, the processor must sample the buffer at a rate of 8 MB/81000 K times per second Assume that each such interrogation and the associated data transfer takes 800 clock cycles in a processor with a 2.5 GHz. What fraction of...
2) b. A disk drive has a speed of 12000 RPM, an average seek time of...
2) b. A disk drive has a speed of 12000 RPM, an average seek time of 5 ms, and a transfer rate of 140 MB/sec. How much time does it take to perform 50 random reads of 10 KB? (In other words, the 50 reads are from random spots on the drive, but each individual read is performed sequentially.) Give your answer in units of seconds. c. Given the same information as in b) above, what is the I/O rate...
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...
Assume a rather old disk drive is configured as follows. The total storage is divided among...
Assume a rather old disk drive is configured as follows. The total storage is divided among 32 surfaces. There are 2048 tracks per sector. There are 512 sectors per track. There are 512 Bytes per sector. The interleaving factor is 4. The disk turns at 7200 rpm. The average startup time for the read/write arm is 15 ms and the average time to move the arm is 0.2 ms per track. Now assume that there is 8 MB file on...
Question 12 Consider a magnetic disk drive with 10 double sided platters, 512(=2^9) tracks per surface,...
Question 12 Consider a magnetic disk drive with 10 double sided platters, 512(=2^9) tracks per surface, and 1024 (=2^10) sectors per track. Sector size is 2KBytes (=2^10 Bytes ). Assume the average seek time 0.02 ms, the seek time from a track to its adjacent track can be ignored. The drive rotates at 5400 rpm. Successive tracks in a cylinder can be read without head movement. Furthermore, disks can be handled independently, so multiple tracks in a cylinder can be...
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...
1. A hard disk drive transfers data 8 bytes at a time and has a peak data rate of 8 MB/s. To make sure old data is not overwritten by new data in the device buffer during an input operation, the processor must sample the buffer at a rate of 8 MB/81000 K times per second Assume that each such interrogation and the associated data transfer takes 800 clock cycles in a processor with a 2.5 GHz. What fraction of...
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...
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