ZuoTi.Pro
Question

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, 4, 5, and 6? d. 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. i. What is the average seek time? ii. What is the average rotational latency? iii. What is the transfer time for a sector? iv. What is the total average time to satisfy a request?

engineering   Computer-Science   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

oL using qlass subthate in maanetic dirk -ל Disk reliability ok wagnetic ,dirk is creased due to lupuo ve Meut in unikouit7 oSeven RAID level -ל Raid 0: guvolve1 distailuted system dala and hai n dik Raid i. Snvolves McAADAin and AN disks Raid 2: Hasteek tune Aveae лас .29.qqq t^ack 【= İn 2179.9 い) Rotational Speed =7200rpm 子2001 -. lampi tume bon complete track 4200 8, 3

1 0
Add a comment
Know the answer?
Add Answer to:
9. a. What are the advantages of using a glass substrate for a magnetic disk? b....
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • 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...

  • single-platter disk

    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...

  • 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...

  • (a) Describe the three fundamental ways for performing I/O and compare their advantages and disadvantages. b)...

    (a) Describe the three fundamental ways for performing I/O and compare their advantages and disadvantages. b) A hard disk rotates at 15,000 rpm and has 1024 tracks, each with 2048 sectors. It takes 100 ms for the head to cross 1024 racks. Assume that the head is above the innermost track. i. What is the average seek time? ii. What is the average rotational delay (latency)? iii. What is the transfer time for one sector? You can round the result...

  • Based on the error corretion algorithm discussed in ch6, Assume data are processed in 2048 bits,...

    Based on the error corretion algorithm discussed in ch6, Assume data are processed in 2048 bits, in order to perform SEC-DED (single error correction and double error detection), what is the best length of the check bits? Question 5 options: A 13 B 14 C 11 D 12 Question 6 (3 points) Consider a magnetic disk drive with 8 double sided platters, 2000 tracks per disk surface. Each track has a capacity 2048 KBytes. Sector size is 2KBytes. Each disk...

  • Consider a magnetic disk that has 1,764 cylinders, 500 sectors per track (on average), 0.07 milliseconds...

    Consider a magnetic disk that has 1,764 cylinders, 500 sectors per track (on average), 0.07 milliseconds minimum seek time, and 5,376 rpm rotational speed. Assume that the disk heads have a constant speed. Each sector is 512 bytes, and each block is four sectors. What is the average rotational delay in milliseconds (rounded to no decimal places)?

  • 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...

  • Question 7. A hard disk has the following parameters 8 surfaces 40,000 tracks per surface •...

    Question 7. A hard disk has the following parameters 8 surfaces 40,000 tracks per surface • 512 sectors per track 1024 bytes per sector Rotational speed 10,000 rpm a) What is the capacity of the drive? b) What is the rotational latency? c) Once a sector has been accessed, what is the rate at which data is read?

  • 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...

  • 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...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT