单项选择题

Which of the following BEST describes the difference between RAID 5 and RAID 6？（）

A. RAID 5 uses a dedicated parity drive and RAID 6 does not.
B. RAID 6 uses a dedicated parity drive and RAID 5 does not.
C. RAID 6 uses more parity drives than RAID 5.
D. RAID 5 uses more parity drives than RAID 6.

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Which of the following is the MOST important consideration before making a change to a server?（）

A. Explore the ramification of the change before implementation.
B. Determine the service level agreement in place before implementation.
C. Review the equipment disposal procedures and policies before implementation.
D. Notify all staff members of the planned system outage before implementation.

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Which of the following BEST describes RAID 1?（）

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