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What do you understand by RAID? Explain RAID Level 4 and Level5?
RAID - It is stands for Redundant Array of Inexpensive Disks (as named by the inventor), or alternatively Redundant Array of Independent Disks (a less relative name, and therefore now the commonly accepted one) - is a technology which employs the simultaneous use of two or more hard disk drives to achieve greater stages of performance, reliability, and/or larger data volume sizes.
RAID Level 4: In this setup, files can be distributed among multiple disks. Each disk operates independently that permits I/O requests to be performed in parallel, by data transfer speeds can suffer due to the kind of parity. The error detection is achieved through dedicated parity and is stored within a separate, single disk unit.
RAID Level 5: Distributed parity needs all drives but one to be present to operate; drive failure needs replacement, but the array is not destroyed through a single drive failure. Upon drive failure, any subsequent reads can be computed from the distributed parity such in which the drive failure is masked from the end user. The array will have data loss in the event of a second drive failure and is vulnerable until the data in which was on the failed drive is rebuilt onto a replacement drive
3. (10 points) Assume that you have been presented with the following relation for the Baxter Aviation database: Charters (Pilot#, Pilot name, Aircraft ID#, #seats, Village, Fligh
I need help in doing my dbms project
need to get answer for questions 3&4 on this page in part 1
#quCreate a database design specification (Enhanced Entity Relationship Diagram (EERD) and Relational Data Model (RDM)) from the given business description. The RDM must be in 3rd
What is meant by data-transfer rate? The data-transfer rate is the rate at which data can be retrieved from or kept to the disk.
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What is meant by Physical blocks? The input and output operations are completed in block units. The blocks residing on the disk are referred to as physical blocks.
Chapter 10a review questions
What is Derived and stored Attribute? Derived and Stored Attribute - In a few cases, two or more attribute values are associated, for example, Age and BirthDate attributes of a
Describe sequential file organization. Explain the rules for (i) Inserting a new record. (ii) Deleting an existing record. Ans:A sequential f
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