Q$1$: Imagine we have a disk drive with $3000$ cylinders, which are numbered $0$ to $2999.$ The drive is currently serving a request at cylinder $97,$ and the previous request was at cylinder $125($hint this tells you direction$).$ The queue of pending requests, in FIFO order, is:

$1401751,222,47,526,1341,2458,327$

Starting from the current head position, what is the total distance $($in cylinders$)$ that the disk arm moves to satisfy all the pending requests, for each of the following disk scheduling algorithms you must draw how the head navigated through each of the algorithm and count that way $($you cannot just use a table made from text. If you want to use a piece of software to draw it you must get approval from your professor first$).$

FCFS

SCAN

SSTE

C$-$SCAN

Q$2$: After looking over your results for question $1,$ which algorithm causes the disk head to travel the smallest number of cylinders?

Q$3$: Imagine we have another disk drive with $1250$ cylinders, which are numbered $0$ to $1249.$ The drive is currently servicing a request at cylinder $1051,$ and the previous request was at cylinder $900($hint this tells you direction$).$ The queue of pending requests, in FIFO order, is:

$111,1167,19,79,2,1211,47,999,453,921,1131$

FCFS

SCAN

SSTF

C$-$SCAN

Starting from the current head position, what is the total distance $($in cylinders$)$ that the disk arm moves

to satisfy all the pending requests, for each of the following disk scheduling algorithms you must draw how the head navigated through each of the algorithm and count that way, $($you cannot just use a table made from text. If you want to use a piece of software to draw it you must get approval from your professor first$).$

Q$4$: For problem $3,$ which algorithm causes the disk head to travel the smallest number of cylinders?

Q$5$: What are three advantages of placing functionality in a device controller, rather than in the kernel? List and explain them. What are three disadvantages of placing functionality on the device controller rather than in the kernel? List and explain them.

Q$6$: What are some of the advantages$/$disadvantages of using HDDs as secondary storage? List and explain them. What are some of the advantages$/$disadvantages of using NVM devices as secondary storage? List and explain them