Compared with Traditional RAID Algorithms, the Erasure Code Redundancy Technology

question 55

Multiple Choice

Compared with traditional RAID algorithms, the Erasure Code redundancy technology provides higher reliability and more flexible redundancy policies. Which of the following statements about Erasure Code is incorrect?

• A) Data to be written is divided into multiple data blocks of the same size.
• B) The Erasure Code algorithm calculates N parity blocks for every M consecutive data blocks. (The value of N is smaller than that of M.)
• C) M+N data blocks are concurrently stored to different nodes.
• D) In Erasure Code storage mode, a concurrent failure of N-l disks is tolerated.

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Definitions:

Subsidiary Ledger

A detailed ledger that contains all the transaction details of a specific account, which is summarized in the general ledger.

Accounts Payable

Liabilities or money owed by a company to its creditors or suppliers for goods and services received but not yet paid for.

General Ledger

A comprehensive record of all financial transactions that occur within a company, organized by account.

Sales Journal

A specialized accounting journal used to record all sales of goods and services on credit.