3.3 RAID Flashcards
What does RAID stand for?
Redundant Array of Independent Disks.
What is the purpose of RAID?
To combine multiple hard disks into a single logical unit for redundancy, performance, or both.
What is RAID 0 known for?
Striping data across multiple disks for faster read/write speeds but no redundancy.
What are the advantages of RAID 0?
Faster speeds and full utilization of disk capacity.
What is the main disadvantage of RAID 0?
No redundancy; if one disk fails, all data is lost.
What is RAID 1 known for?
Mirroring data across two disks for full redundancy.
What are the advantages of RAID 1?
Data integrity and ability to survive the failure of one disk.
What is the main disadvantage of RAID 1?
Halves usable storage as one disk is a complete copy of the other.
What is RAID 5 known for?
Redundancy with parity distributed across three or more disks.
What are the advantages of RAID 5?
Can tolerate one disk failure and is more storage-efficient than RAID 1.
What are the disadvantages of RAID 5?
Requires at least three disks and slower write speeds due to parity calculations.
What is RAID 6 known for?
Double parity, allowing for redundancy even if two disks fail.
What are the advantages of RAID 6?
Higher fault tolerance than RAID 5.
What are the disadvantages of RAID 6?
Requires at least four disks and more processing for double parity.
What is RAID 10 (1+0)?
Combines RAID 1 (mirroring) and RAID 0 (striping) for both speed and redundancy.
What are the advantages of RAID 10?
High speed and redundancy for critical systems.
What are the disadvantages of RAID 10?
Halves usable storage and requires at least four disks.
Which RAID level provides the highest speed?
RAID 0.
Which RAID level provides the best redundancy with the least storage loss?
RAID 5.
Which RAID levels allow for fault tolerance if two disks fail?
RAID 6 and RAID 10.
What RAID level would you choose for a gaming system?
RAID 0 for speed.
What RAID level is ideal for critical business systems requiring high uptime?
RAID 10 or RAID 6.
What does the parity in RAID do?
Ensures data can be rebuilt in case of disk failure by storing checksums across disks.
What RAID levels are most commonly used in servers?
RAID 1, RAID 5, RAID 6, RAID 10.
