Calculate the mttf of two redundant disk drives

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Reference no: EM131839468

Assignment

1. Fill in the blanks

Hexadecimal	Decimal	Binary
0x7d
0xe6
0xe3
		00010110
		00111010
		10101111
	1
	45
	46
	131

2. Calculate the overall MTTF of the following system:

Component	MTTF
RAID System	6 Million hours
Server Board	3 Million hours
Power Supply	500,000 hours
Network Interface Card	8 Million hours
Cooling Fan	400, 000 hours

3. Calculate the MTTF of two redundant disk drives where the MTTF is 1.2 million hours and the MTTR is 20 hours.

4. Calculate the effective CPI;

Inst Class	A	B	C
CPI	3	2	4
# Instructions	480	640	320
Proportion

Overall CPI = ________________

5. The table below shows execution times (in seconds) of a program on two machines. Calculate which machine is faster, by what factor, and by what percent.

Machine A	Machine B	Which is faster?	By Factor	By Percent (0.1%)
1.307971	1.721145
1.22175	2.087343
0.500306	2.587857
3.710749	2.982973
3.90917	3.867584

6.Fill in the blanks. For example, 32 bits can address 4Gigabytes of memory. Be sure that your numbers for size of memory are powers of 2, i.e., 32 MB. Do not calculate 2^32

Address bits	Size of Memory
16
20
18
23
19
	2 Megabytes
	4 Megabytes
	128 Megabytes
	8 Terabytes
	4 Kilobytes

7. Order the machines from fastest to slowest:

Machine	Instructions	CPI	Clock (GHz)	Exec Time
A	2000	1.6	4
B	1200	2.1	1.2
C	1700	2.4	3.4
D	2000	2.1	1.4

(fastest) (slowest)

Reference no: EM131839468

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