Comptia a+ raid
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36 Terms
Raid 0: uses this method
Striping
RAID 0 provides which benefits?
Excellent read/write performance
Raid 0: minimum number of discs
2
Raid 0: fault tolerance
0
Raid 1: uses this method
disk mirroring
RAID 1 provides which benefits of RAID?
Good read performance
How does Raid 0 provide a benefit
data can be read and written from multiple disks simultaneously
Raid 0 drawback
it provides NO fault tolerance
Which is most common Raid version
Raid 1
RAID 1 is generally considered to be the best compromise between
cost and performance
Raid 0: If you had 4 disc of 2 TB each, what is the total storage
8 TB.
What version of Raid should never be used for critical data storage
Raid 0
Raid 1: fault tolerance. How many drives can fail
1
Raid 1: If you had 4 disc of 2 TB each, what is the total storage
4 TB
What percentage of total storage do you get with Raid 0?
100%
What percentage of total storage do you get with Raid 1?
50%
RAID 5 provides which benefits?
Excellent read performance
Raid 5: uses this method
Disc Striping with parity
Raid 5: minimum number of discs
3
Raid 5: fault tolerance. How many drives can fail
1
Raid 5: If you had 4 disc of 2 TB each, what is the total storage
6 TB.
How do you calculate the total storage for Raid 5:
Capacity is the sum of the disks minus one.
What Raid should not be used for very large storage amounts and why
Raid 5. The bigger the disk that fails, the longer it takes to rebuild the volume, which could lead to another drive failure.
RAID 6 provides which benefits?
Excellent read performance
Raid 6: uses this method
Disc Striping with dual parity
Raid 6: fault tolerance. How many drives can fail
2
Raid 6: minimum number of discs
4
Raid 6: If you had 4 disc of 2 TB each, what is the total storage
4 TB
What is the preferred solution for very large storage arrays
Raid 6
Raid 10 combines the characteristics of
RAID 0 and RAID 1
Raid 10: uses this method
Striping and mirroring
Raid 10: minimum number of discs
4
Raid 10 benefits
Excellent read/write performance and fault tolerance
Raid 10 drawback
Most expensive RAID option
Raid 10 fault tolereance
1 disc
RAID 5 provides which drawbacks
slower write performance