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Dell Storage Technology Foundations Online Training Course
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RAID
Overview
Single RAID Levels
Combined RAID Levels
Selecting a Level

PERC
Overview
PCI Based PERC
Integrated PERC

Clustering
High Availability

Review
Section Review
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Data Availability

Section Review


1) Select the appropriate statement(s) concerning RAID 0:


It may be implemented with only one hard disk.


It is one of the easier to implement RAID levels.


It provides high data redundancy.


It increases disk I/O performance.



2) Select the appropriate statement(s) concerning RAID 1:


It may be implemented with only one hard disk.


It must use an even number of hard drives.


It provides high data redundancy.


It increases disk I/O performance.



3) Select the appropriate statement(s) concerning RAID 3:


If the parity disk fails, all data will be lost.


It decreases write performance compared to a single disk.


It increases read performance compared to a single disk.


It requires at least two hard drives to be implemented.



4) Select the appropriate statement(s) concerning RAID 5:


Two hard drives can fail and no data loss will occur.


Disk performance will not suffer during a rebuild.


It requires at least three hard disks to be implemented.


It increases read performance over that of a single disk.



5) Select the appropriate statement(s) concerning RAID 10:


Hard disks must be added to the array two at a time.


It provides increased read and write performance over single disks.


It is inexpensive and simple to implement when compared to a RAID 1.


It does NOT provide data redundancy.



6) Select the appropriate statement(s) concerning RAID 0+1:


It suffers from poor rebuild performance.


Drives must be added to the array in pairs.


It has less write performance than a RAID 1.


At least four hard disks are required to implement.


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