Suppose the price of memory falls by half, and the speed of disk access (number of accesses per second) doubles, while all other factors remain the same. What would be the effect of this change on the 5-minute and 1-minute rule?
Q: Consider a magnetic disk drive with 8 surfaces, 512 tracks per surface, and 64 sectors per track.…
A:
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Q: Consider a Disk I/O transfer, in which 1500 bytes are to be transferred, but number of bytes on a…
A: Handwritten solution
Q: Example- 5.8 A hard disk with one platter rotates at 15,000 rpm and has 1024 and has 1024 tracks,…
A: solution : as the data given in the question ,here is the answers
Q: Example-8.4 Consider a UNIX filesystem with the following components: Disk blocks are 096 bytes.…
A: Solution : As the details given, here are the answer.
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Q: Consider a disk with an advertised average seek time of 6 ms, rotation speed of 7,200 rpm, and…
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A: we are using ASCII code for size of process we are taking s = 115 u = 117 f = 102 y = 121 a = 97…
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A: Step 1 The answer is given in the below step;
Q: Suppose your system has a memory of size 100 MB using contiguous memory allocations and there are 4…
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A: Given that, Block size B=4096 bytes Record size R=250 bytes Number of records r=400000
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Q: Consider a disk pack with a seek time of 4 milliseconds and rotational speed of 10000 rotations per…
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Q: Assume the price of memory drops in half and the speed of disk access (number of accesses per…
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Q: Consider a disk pack with 16 surfaces, 128 tracks per surface and 256 sectors per track. 512 bytes…
A: Introduction. givena disk pack with no of surface=16tracks=128no of sector/track=256data…
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A: Total number of access = 10 Total number of hit = 6 Total number of miss = 4
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Q: Q2) Consider a magnetic disk drive with 8 surfaces, 512 tracks per surface, and 64 sectors per…
A: The Answer is
Q: 2. Suppose that the hard disk on your personal computer rotates at 3000 revolutions a minute, that…
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Q: A processor sends 40 disks I/Os per second, these requests are exponent-distributed, and the average…
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A: Given:
Q: Consider a Disk 1/O transfer, in which 1500 bytes are to be transferred, but number of bytes on a…
A: Given No.of bytes to be transferred (b)=1500 bytes Rotation speed (r)=1500 Number of bytes on track…
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A: We have 10 direct pointers that each point directly to a 4K data block, so we can point to 10 * 4K =…
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Q: Consider a Disk l/O transfer, in which 1500 bytes are to be transferred, but number of bytes on a…
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Q: The disk concept for reducing time lost from rotational delay is: staggered addressing why?
A: Given that: The topic is about the disk concept for reducing time lost from rotational delay is:…
Q: Q2) Consider a magnetic disk drive with 8 surfaces, 512 tracks per surface, and 64 sectors per…
A: A) Disk capacity = 8*512*64*1KB = 228 B = 256MB
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A: 1 GB = 1 073 741 824 bytes = 10243 B = 230 B So, 4 x 230 bytes = 4 x 1 GB…
Q: A. Suppose the following disk request sequence (track numbers) for a disk with 200 tracks is given:…
A: Below I have provided the handwritten solution of the given question:
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A: We need to discuss the given situations regarding cpu and disk utilisation.
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Q: question(6).Consider a disk pack with 32 surfaces, 64 tracks and 512 sectors per pack. 256 bytes of…
A: Introduction :
| Suppose the price of memory falls by half, and the speed of disk access (number of accesses per second) doubles, while all other factors remain the same. What would be the effect of this change on the 5-minute and 1-minute rule? |
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- There are many parameters that could be used to describe disk performance; among them are: number of bits per track disk capacity (in bits) number of disk surfaces rotational speed rotational latency transfer rate tracks per surface sectors per track blocks per track sectors per block seek time speed of disk arm block-read time number of blocks Some of these parameters are independent, and others are (approximately) linearly related. That is, doubling one doubles the other. Decide which of these parameters are linearly related. Then, select from the list below, the relationship that is true, to within a close approximation. Note: none of the statements may be true exactly, but one will always be much closer to the truth than the other three. Also note: you should assume all dimensions and parameters of the disk are unchanged except for the ones mentioned. a) If you double the number of sectors per block, then you double the number of blocks on the disk. b)…There are many parameters that could be used to describe disk performance; among them are: number of bits per track disk capacity (in bits) number of disk surfaces rotational speed rotational latency transfer rate tracks per surface sectors per track blocks per track sectors per block seek time speed of disk arm block-read time number of blocks Some of these parameters are independent, and others are (approximately) linearly related. That is, doubling one doubles the other. Decide which of these parameters are linearly related. Then, select from the list below, the relationship that is true, to within a close approximation. Note: none of the statements may be true exactly, but one will always be much closer to the truth than the other three. Also note: you should assume all dimensions and parameters of the disk are unchanged except for the ones mentioned. a) If you divide tracks into half as many blocks, then you double the read time for a block.…Consider a disk drive specifications. with the following 16 surfaces, 512 tracks/surface, 512 sectors/ track, 1 KB/sector, rotation speed 3000 rpm. The disk is operated in cycle stealing mode whereby whenever one byte word is ready it is sent to memory; similarly, for writing, the disk interface reads a 4 byte word from the memory in each DMA cycle. Memory cycle time is 40 nsec. The maximum percentage of time that the CPU gets blocked during DMA operation?
- A disk has a capacity of two tera-byte size. Say the file system uses a multi-level inode structure for locating the data blocks of afile.The inode stores pointers to data blocks, including a single indirect block, a double indirect block, and several direct blocks in the 64 B of available space.Now, it is given that the disk has a block size of 512 B. The maximum file size that can be stored in such a file system in MB (round off upto 2 decimal places).A computer uses virtual memory, and a new solid-state drive (SSD) as space for paging. Refer to the last ppt file. In the case presented there, the hard disk drive (HDD) required 25 ms to read in a page, and a rate of 1 page fault per 1000 references introduced a 250 slowdown. If the SSD offers a time of only 80 µs, what is the slowdown in performance caused by 1 pf per 1000 references (you are not concerned with dirty vs. clean pages). What is the maximum rate of page faults you can accept if you want no more than a 5% slowdown in execution using virtual memory? Know your metric prefixes and symbols for time: s for seconds, ms for milliseconds, µs for microseconds, ns for nanoseconds.Consider a computer system that has the following characteristics: The memory bus runs at 400 MHz. The memory bus is 8 bytes wide. Accessing a memory address in memory requires 8 memory bus cycles. The disk drives can each read a block every 4 milliseconds. Disk blocks read are 8 kilobytes each. Assume Direct Memory Access from the disk drive. What is the highest percentage of the memory bus capacity that could be consumed by the disk’s Direct Memory Access if there are 4 disk drives in use?
- Consider a disk pack with 16 surfaces, 128 tracks per surface and 256 sectors per track. 512 bytes of data are stored in a bit serial manner in a sector. The capacity of the disk pack and the number of bits required to specify a particular sector in the disk.?Suppose that a disk drive rotates at 8000 RPM. It has an average seek time of 4 milliseconds. If its transfer rate is 15 Mbps, determine the average time it takes for a 15K byte request to be transferred from the time the disk starts the seek? From this, determine its throughput.In Feynman's lecture he wondered "why cannot we write the entire 24 volumes of the Encyclopedia Brittanica on the head of a pin". For a modern hard disk drive the area of a single bit of information on the surface of the disk is roughly 10 x 40 nm² in area. In such a hard drive would the area required to store the data for 24 volumes of the Encyclopedia Brittanica be greater or less than the head of a pin? In Feynman's lecture he estimates the 24 million books as big as the Encyclopedia Brittanica has 10¹5 bits of information.
- A certain disk can read data at a rate of 515.2 MB/s. How many books can be read in 4 seconds if an "average" book has69 pages,20 lines per page,9 words per line,6 characters per word,and each character is one of 100 different characters where the fewest number of bits are used to represent each character?Consider a disk with the following characteristics: block size 512 bytes, number of blocks per track=20, number of tracks per surface=400. A disk pack consists of 15 double sided disks. i) Suppose the disk drive rotates the disk pack at an average speed of 2400 rpm (revolutions per minute) o How much time in (msec) does one disk revolution take? o Using the total capacity of the track how many bytes will be transferred from the track in 1 msec (ie transfer rate in bytes/sec)Consider a demand-paged computer system where the degree of multiprogramming is currently fixed at seven. The system was recently measured to determine utilization of the CPU and the paging disk. Three alternative results are shown below. For each case, what is happening? Can the degree of multiprogramming be increased to increase the CPU utilization? Is the paging helping? Justify.a. CPU utilization 10 percent; disk utilization 95 percentb. CPU utilization 95 percent; disk utilization 1 percentc. CPU utilization 10 percent; disk utilization 5 percen