RAIDs. For this question, we'll examine how long it takes to perform a small workload consisting of 12read/ writes to random locations within a RAID. Assume that these random read/writes are spread "evenly" across the disks of the RAID. To begin with, assume a simple disk model where each read or write takes D time units. Show your work. a. Assume we have a 4-disk RAID-0 (striping). How long does it take to complete the 12 writes? b. How long on a 4-disk RAID-1 (mirroring) with 12 writes? c. How long on a 4-disk RAID-4 (parity) with 12 writes?

Answers

Answer 1

a. For a 4-disk RAID-0 (striping), each write will be spread evenly across all 4 disks. This means that each disk will receive 3 writes. Since each write takes D time units, it will take a total of 3D time units to complete the 12 writes.

b. For a 4-disk RAID-1 (mirroring), each write will be mirrored onto another disk, resulting in 6 writes total. Since each write takes D time units, it will take a total of 6D time units to complete the 12 writes.

c. For a 4-disk RAID-4 (parity), each write will be spread evenly across 3 of the disks, while the 4th disk will be used for parity. This means that each disk will receive 4 writes, and the parity disk will be written to 3 times. Since each write takes D time units, it will take a total of 4D time units to complete the writes on each data disk, and 3D time units to complete the writes on the parity disk. Therefore, it will take a total of 15D time units to complete the 12 writes on a 4-disk RAID-4.

the time it takes to complete a small workload consisting of 12 read/writes to random locations within a RAID will depend on the RAID configuration. For a 4-disk RAID-0, it will take 3D time units. For a 4-disk RAID-1, it will take 6D time units. For a 4-disk RAID-4, it will take 15D time units.

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Related Questions

Find x ( transversals relations )

Answers

Answer:

x = 12

Step-by-step explanation:

(8x - 34) and (5x + 2) are alternate angles and congruent, then

8x - 34 = 5x + 2 ( subtract 5x from both sides )

3x - 34 = 2 ( add 34 to both sides )

3x = 36 ( divide both sides by 3 )

x = 12

An archaeologist used string to make a grid over an area
where she was digging. She discovered a bowl buried at
(1,4) and a tool at (3, 10) on her grid. She suspected that an
item was buried at the midpoint of the segment connecting
the bowl and the tool. At which position on her grid should
the archaeologist dig to look for the buried item?

Answers

Answer:

option a c d are correct

Step-by-step explanation:

    Since, the item was burried at the midpoint of the segment joining bowl and the tool. Archaeologist should dig at the midpoint which is at (2, 7).

Mid-point of a segment joining two points: If two points (a, b) and (c, d) are joined by a line segemnt, coordinates of the midpoint will be,

        Mid-point = [tex](\frac{a+c}{2},\frac{b+d}{2})[/tex]

Given points representing a bowl and a tool are (1, 4) and (3, 10).

Since, an item is burried at the midpoint of the segment joining bowl and tool,

Use the expression for the position of the mid-point of the segment.

Position of the item → [tex](\frac{1+3}{2},\frac{4+10}{2})[/tex]

                                 → (2, 7)

       Hence, position of the burried item will be at (2, 7).

Learn more to get the center of a segment joining two points here,

https://brainly.com/question/10677252?referrer=searchResults

I need a lot of heeelp pleaseee

Answers

Answer:

i think its mn

Step-by-step explanation:

its the 2 close to qs

if c% of a number is (a+b) what is the number

Answers

Answer:(a+b)/c ×100

Step-by-step explanation:

Let the number be "x"

According to the question,

X×C% = a+b

>> X × C/100 = a+b

So, x =(a+b)/c × 100

What is the difference?

Answers

Answer:

I WAS WRONG PICK D

Step-by-step explanation:

I'm an idiot

Is the following triangle congruent by SAS, ASA, or SSS? Why?

Answers

Answer:

ASA

Step-by-step explanation:

As it is shown

m<A = m<Z

m<Y = m<C and

|YZ| = |AC| so the triangles are congruent by ASA

Quincy has box of cereal to eat over 6 days. If he splits the box into equal portions, how much will he eat each day?​

Answers

Answer:

1/6 of the cereal box

Step-by-step explanation:

Factor x⁴y² + x³y³.
A. x 3y 2(x + y)

B. x³y² (x + 1 )

C. x²y² (x + y)​

Answers

Answer:

A..........,..,......

Step-by-step explanation:

....,.............

multiple choice geometry question helppp

Answers

COS = Adjacent / Hypotenuse

CosZ = 24/30

45x^4 + 72x^3 is factored form

Answers

Answer: 9 x 3 ( 5 x + 8 )

Step-by-step explanation:

Factor  9 x 3  out of  45 x 4 + 72x 3 .

A player kicks a soccer ball resting on the ground. The height of the ball, h(t) in feet, after t seconds can be represented by the function h(t) = -16+2 +96t.
Use this information to answer the two questions that follow.
Part A: What is the total elapsed time, in seconds, from the time the ball is kicked until it reaches ground level again?
seconds
Part B: When will the ball reach its maximum height?
After seconds

Answers

Answer:

Part A: 6

Part B: 3

Step-by-step explanation:

trust me.

Answer:

6 seconds

After 3 seconds

Step-by-step explanation:

h(t) =-16t^2+96t

a=-16

b=96

c=0

96/2(-6) =3

Max = 3

(0,)

(6,0)

ht/t  = 16t^2+96/t

which even number is a prime number​

Answers

Answer:

2

Step-by-step explanation:

The only even number which is a prime is 2. It is the smallest prime number. Except 2, all other prime numbers are odd numbers.

Answer:

Answer is 2

Step-by-step explanation:

The only even number which is a prime is 2. It is the smallest prime number. Except 2, all other prime numbers are odd numbers.

I hope it's helpful!

2horas 3 minutos 47 s as​

Answers

Answer: I dont understand.

Step-by-step explanation:

Answer the photo below thanks

Answers

Answer:

D.

Step-by-step explanation:

3/6 = 30/60

Answer:

The answer is D

Step-by-step explanation:

3/6 = 30/60

If you divide the top and bottom of 30/60 by 10 you get 3/6

Hope that helps

The price have changed from $120 to $75. By how many
percent did it change?
Plz show how you did it

Answers

Answer:

around 37%

Step-by-step explanation:

120 × (1 - 37%) = 120 × (1 - 0.37) = 75.6

if im being honest i used calculator . net's percentage calculator

what is 10% of $10
Pls i need help

Answers

Answer:

1 dollar

Step-by-step explanation:

1 dollar is one tenth of a dollar ie 10%

Answer:

the answer is $1.

Step-by-step explanation:

- convert 10% into decimal form, which is 0.10

- then multiply 0.10 to 10

- that would equal to 0.10x10=1

Use multiplication to solve the proportion. a/6 = 15/2

Answers

Answer:

[tex]\frac{a}{6}[/tex] = [tex]\frac{15}{2}[/tex]

2a = 6 · 15

2a = 90

a = 45

Step-by-step explanation:

Find the number of terms in this polynomial. 7g7 + 10g4 – 6g3 + 3g2 - g​

Answers

Answer:

If you have more than 4 terms you say polynomial with the certain number of terms you have. So the answer to this is polynomial with 5 terms.

Hope this helps.

Which Paris of triangle must be similar?

Answers

Triangles 1 and 2 are equilateral

The table shows two linear functions and the function values for different values of x.
Which expression represents h(x)?
A. (f ∙ g)(x)
B. (g + f)(x)
C. (f – g)(x)
D. (g – f)(x)

Answers

Answer:

the answer is A. (f ∙ g)(x)

Step-by-step explanation:

i got it wrong twice, and then it told me the answer

Answer:

its   A

Step-by-step sussy vent imposter baka :)  ;0

There are 150 adults and 255 children at a zoo. The zoo makes a total of $4,500 from the entrance fees, and the cost of an adult and a child to attend is $23. how much does it cost each for a parent and a child? Let a represent an adult. Letc represent a child. Enter a system of equations to represent the situation, then solve the system. The system of equations is and The adult tickets cost $ and the child tickets cost $​

Answers

Answer:

y+x=31, 150x+225y=5100.

y=-x+31

150x+225(-x+31)=5100

-75x=-1875

x=25 (adult tickets are $25)

31-25= 6 (child tickets are $6)Step-by-step explanation:

Answer:

Parent: $25

Child: $6

Step-by-step Explanation:

y+x=31, 150x+225y=5100

y=-x+31

150x+225(-x+31)=5100

-75x=-1875

x=25 (adult tickets are $25)

31-25= 6 (child tickets are $6)

I hope this helped :D

Num projeto, o desenho de um jardim tem a forma de um triângulo retângulo onde a hipotenusa mede 4,5 cm. A escala utilizada foi de 1:200. Qual é o comprimento real desse lado do jardim (hipotenusa)? Apresenta a resposta em metros.

Answers

Answer:

9 metros

Step-by-step explanation:

Da pergunta acima

Fator de escala =

Medida correspondente: Representação do objeto

= 1: 200cm

Conseqüentemente:

1 cm = 200 cm

4,5 cm = x cm

x cm = 4,5 × 200 cm

x cm = 900 cm

O comprimento real deste lado do triângulo (hipotenusa) = 900cm

Pediram-nos para converter para metros

100cm = 1 m

900cm = xm

Multiplicação cruzada

100 cm × xm = 900 cm × 1 m

xm = 900 cm × 1 m / 100cm

xm = 9m

O comprimento real deste lado do triângulo (hipotenusa) em metros = 9 metros

Shirley went shopping in a mall. She reached the mall 12.5 minutes later than her usual time. While returning she took 20 minutes more than twice her usual time to reach home. If the usual time she takes to reach the mall is 40 minutes, find the total number of minutes Shirley spent going and coming back from the mall.

Answers

Answer:

Total time Shirley spent  going and coming back from the mall= 152.5 minutes

Step-by-step explanation:

Usual time it takes to reach mall from home = 40 minutes

New time she took to reach the mall=12.5 minutes later than her usual time

= 40 minutes + 12.5 minutes= 52.5 minutes

New time she took to reach home ( lets assume she followed the same route as coming from home in which she spends 40 minutes) =20 minutes more than twice her usual time to reach home.=20 minutes + 2(40)= 20 minutes  + 80 minutes

=100 minutes

Total time  going and coming back from the mall =52.5 minutes  +100 minutes = 152.5 minutes

need help asap! will give brainliest<3

Answers

Answer:

(B)

Step-by-step explanation:

don’t understand........

Answers

Answer:

120 cubic inches.

Step-by-step explanation:

The formula for volume is length times width times height. So if you take the length (10), and you take the width (3), and then you multiply them together you get 30. Now all you have to do it multiply that to the height (4) so you get 120. So your answer should be 120 cubic inches.

10 × 3 = 30

30 × 4 = 120

I hope this helps you and you understand now. Have a nice day! :D

Jaime has lunch at a restaurant and needs to determine how
much tip to leave based on his bill. If his bill was $14.41 and
Jaime wants to leave a 20% tip, what is a reasonable estimate
for how much he should leave?

Answers

Answer:

2.88

Step-by-step explanation:

Write a proportion for brainliest

Answers

Answer:

B) [tex]\frac{WV}{VY} =\frac{VX}{XY}[/tex]

Step-by-step explanation:

The triangle VXY and triangle VWY are similar because they are both right triangles. Option B shows the correct proportions based off of this. Line WV is similar to line VX and line VY is similar to line XY.

I hope it helps and is correct!

Three sisters have ages that are consecutive odd integers. The sum of their ages is 57. Find the age of each sister.

Answers

Answer:

The answer is 17 19 and 21

hope i could help!

Which describes how to calculate the range of this data set?
4, 5, 6, 8, 11, 12

A.) Subtract 11-5.
B.) Subtract 12-5.
C.) Add 11+5.
D.) Add 12+4.

Answers

Answer none of them it’s 12-4=8

Answer:

D.) Add 12+4

Step-by-step explanation:

I took the test on Edge 2021.

could someone pleaseee help me :)

Answers

Answer:

1st one

Step-by-step explanation:

Answer:

a = 24

a = 150

a = 66

Step-by-step explanation:

your welcome

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