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Author Question: A SCSI host adapter uses what to communicate with the devices attached to it? A) a cell relay ... (Read 69 times)

Wadzanai

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on: Jul 7, 2018
A SCSI host adapter uses what to communicate with the devices attached to it?
 
  A) a cell relay packet-switching service
  B) a center race container service
  C) a parallel bus
  D) a comma switcher

Question 2

Why could RAID 0 be a potentially dangerous RAID choice?
 
  What will be an ideal response?


Qarqy

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Reply #1 on: Jul 7, 2018
Answer to Question 1

C

Answer to Question 2

The interesting thing about RAID 0 is that, in reality, it provides no redundancy, and therefore no fault tolerance, making it a potentially dangerous RAID choice. The advantage of RAID 0 is that it offers the best performance in terms of data access as no overhead is involved for data recovery. Overhead is not involved because error checking is not performed. Also, drives can be accessed in parallel for read and write operations. However, for the multiple drives in a RAID 0 array, should one of the drives fail, the entire array fails. This means consequently that data on all the drives that make up the array becomes unusable should one drive fail. The result of this type of failure is no fault tolerance. Because there is no fault tolerance, when implementing RAID 0 an enterprise must make sure that regular backups are performed so that data can be recovered if the array fails.


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