This is the specification of the Toshiba MK5059GSXP internal hard drive: Calculate the average access time for the hard drives. Based on the specification in the Figure above, calculate the total seek time if you were to apply SSTF, SCAN, and C-SCAN algorithms on the hard disk. Assume that the read/write head is currently positioned at location 100 and is moving in the direction of increasing track number. The track requests in the disk queue are as follows: 153, 59, 65, 147, 168, 80, 89, 63 Based on your answer in (b), suggest and justify the algorithm that performs better disk scheduling in terms of: Fair service distribution ii. Disk throughput

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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This is the specification of the Toshiba MK5059GSXP internal hard drive:

 

  1. Calculate the average access time for the hard drives.

 

 

  1. Based on the specification in the Figure above, calculate the total seek time if you were to apply SSTF, SCAN, and C-SCAN algorithms on the hard disk. Assume that the read/write head is currently positioned at location 100 and is moving in the direction of increasing track number. The track requests in the disk queue are as follows:

153, 59, 65, 147, 168, 80, 89, 63

 

 

 

  1. Based on your answer in (b), suggest and justify the algorithm that performs better disk scheduling in terms of:
  2. Fair service distribution ii.    Disk throughput 
Features
HDD size
2.5"
HDD capacity
500 GB
HDD speed
5400 RPM
Interface
SATA, Serial ATA
Storage drive buffer size
8 MB
Track to track seek time
2 ms
Average seek time
12 ms
Average latency
5.55 ms
Mean time between failures (MTBF)
600000 h
Power
Power consumption (standby)
0.18 W
Power consumption (read)
1.5 W
Power consumption (write)
1.5 W
Power consumption (idle)
0.55 W
Transcribed Image Text:Features HDD size 2.5" HDD capacity 500 GB HDD speed 5400 RPM Interface SATA, Serial ATA Storage drive buffer size 8 MB Track to track seek time 2 ms Average seek time 12 ms Average latency 5.55 ms Mean time between failures (MTBF) 600000 h Power Power consumption (standby) 0.18 W Power consumption (read) 1.5 W Power consumption (write) 1.5 W Power consumption (idle) 0.55 W
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