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 the disk, arranged for best access it could be. On the average how long will it take to read all the data in the file?
Assume that the first track of the file is randomly placed on the disk, that the entire file lies on minimal number of adjacent tracks ant that the file completely fills on each track on which it is found. A seek must be performed each time the I/O head moves top a new track. Show all the details for your calculations.
Assume a rather old disk drive is configured as follows. The total storage is divided among...
Consider a disk with a sector size of 512 bytes, 2000 tracks per surface, 50 sectors per track, five double-sided platters, and average seek time of 10 msec Suppose that a block size of 1024 bytes is chosen. Suppose that a file containing 100,000 records of 100 bytes each is to be stored on such a disk and that no record is allowed to span two blocks 1. Suppose the interleaving factor is 3. What time is required to read...
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...
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 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.
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)?
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....
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...
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!
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 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...