Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Chapter 12, Problem 6PE

Explanation of Solution

a.

Redundant Array of Independent Disks (RAID) level 1 scheme:

RAID’s are a number of hard disks which store exact same data. Different RAID levels are available from 1 to 10, each with different significance.

The scheme for getting the effect of atomic block writes with the RAID level 1 (mirroring) is shown below:

  • A block write operation is performed as follows, to secure atomicity.
    • Write the information onto the physical block which is located first.
    • Write the similar information onto the physical block located at the second, when the first write accomplishes successfully.
    • Only after the second write accomplishes successfully, the output is announced.
  • Each set of “2” physical blocks is tested during recovery.
  • Further process is not required if both are same and there is unnoticeable partial-write...

Explanation of Solution

b.

Redundant Array of Independent Disks (RAID) level 5 scheme:

RAID’s are a number of hard disks which store exact same data. Different RAID levels are available from 1 to 10, each with different significance.

The scheme for getting the effect of atomic block writes with the RAID level 5 (block interleaved, distributed parity) is shown below:

  • Initially, the data is written in the information block.
  • Once this write is successful, the same data is written into the related parity block.
  • The write is considered successful only when both the writes are successfully completed...

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Specifications: Part-2Part-2: DescriptionIn this part of the lab, we will illuminate two 7-segment displays. You will need to understand 2's Complement todetermine when the input 4-bit binary number corresponds to a negative or positive number. To understand how anLED display works in Digital, please refer to the playWithLED_Display.dig file provided. You should play withdifferent input combinations to see how it influences the LED Display value. In the screenshot below, note how I wasable to generate the display of “3” on the Hex display by lighting up only certain input wires to the unit. Here is a picture of how the different segments light up to produce the different displays: Note in the picture above that we showed displays only from 0-8 since in 4-bit 2s complement representation, 8 is thelargest modulus value you can represent (the range of integers would be -8 to +7).Your circuit in Part-2 must accept a 4-bit 2's complement input {in3, in2, in1, in0} where in3 is the most…
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