A hard disk has average seek time of 70 ms, rotation speed of 4150 rpm, and...
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A hard disk has average seek time of 70 ms, rotation speed of
4150 rpm, and...
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...
Suppose a disk drive in your system has a rotation speed of 7,200 rpm. and seek...
Suppose a disk drive in your system has a rotation speed of 7,200 rpm. and seek times of 0.75 ms track-to-track, or 22 ms full ‘stroke’ (inner edge to outer edge). (a) What is the average latency to access this drive? (b) If the sustained read rate is 36 Mbits/sec, how much more time after the average latency (you calculated above) will it take to read 750 Kbytes (assuming all those bytes are in sequential sectors on the same track)?...
??? 4) A disk has a rotation time of 6 ms and a controller overhead of 1 ms. It takes 106 ms to ac record 2,304,000...
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4) A disk has a rotation time of 6 ms and a controller overhead of 1 ms. It takes 106 ms to ac record 2,304,000 bytes long from the disk. The data transfer time for this record is 90 ms. a) What is the seek time for this disk? b) How many tracks does the record occupy? c) How big is a track on this disk in bytes? d) What is the disk's bandwidth in megabytes per second? e)...
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...
please help 4) A disk has a rotation time of 6 ms and a controller overhead of 1 ms. It takes 106 ms to ac record 2,...
please help
4) A disk has a rotation time of 6 ms and a controller overhead of 1 ms. It takes 106 ms to ac record 2,304,000 bytes long from the disk. The data transfer time for this record is 90 ms. a) What is the seek time for this disk? b) How many tracks does the record occupy? c) How big is a track on this disk in bytes? d) What is the disk's bandwidth in megabytes per second?...
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?
5. A disk has 1024 sectors/track with 4096 bits/sector and a rotation rate of 7200 RPM....
5. A disk has 1024 sectors/track with 4096 bits/sector and a rotation rate of 7200 RPM. What is the sustained transfer rate of the disk over one track?
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)?
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 program must write 4 sectors onto a disk. Each sector is 0.5KB. The disk drive...
A program must write 4 sectors onto a disk. Each sector is 0.5KB. The disk drive rotates at 10,000 rpm. The average seek time is 6 ms and the disk controller overhead is 1 ms. The transfer rate is 1 MB/sec. The current location of the R/W head is not known. What is the time to write this data if a. Sectors are on the same track and are contiguous b. Sectors are on the adjacent cylinders. The sectors can...
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4) A disk has a rotation time of 6 ms and a controller overhead of 1 ms. It takes 106 ms to ac record 2,304,000 bytes long from the disk. The data transfer time for this record is 90 ms. a) What is the seek time for this disk? b) How many tracks does the record occupy? c) How big is a track on this disk in bytes? d) What is the disk's bandwidth in megabytes per second? e)...
please help
4) A disk has a rotation time of 6 ms and a controller overhead of 1 ms. It takes 106 ms to ac record 2,304,000 bytes long from the disk. The data transfer time for this record is 90 ms. a) What is the seek time for this disk? b) How many tracks does the record occupy? c) How big is a track on this disk in bytes? d) What is the disk's bandwidth in megabytes per second?...
5. A disk has 1024 sectors/track with 4096 bits/sector and a rotation rate of 7200 RPM. What is the sustained transfer rate of the disk over one track?
A program must write 4 sectors onto a disk. Each sector is 0.5KB. The disk drive rotates at 10,000 rpm. The average seek time is 6 ms and the disk controller overhead is 1 ms. The transfer rate is 1 MB/sec. The current location of the R/W head is not known. What is the time to write this data if a. Sectors are on the same track and are contiguous b. Sectors are on the adjacent cylinders. The sectors can...
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