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CompTIA Tech+ 6.7 CompTIA Tech+ 6.1 CompTIA Tech+ 2.5 CompTIA A+ Core 1 3.3 CompTIA Server+ 1.2
TechKnowSurge Catalog Interactives Still Running?
InteractiveComputeFree

Still Running?

A drive, a power supply or a whole site fails. Is the data still available? Land five in a row.

⚑ Complete this interactive to capture a CTF flag worth 5 points.

About this interactive

Technology fails, so we plan for it. Redundancy is an extra component that takes over when one dies, like the spare tire in a car. It keeps data available. Redundancy only covers what was duplicated. Two mirrored drives survive a drive failure, but if the server has one power supply and it fails, both drives stop with it. Two copies of the data in one building do not survive a flood of that building; copies at two sites do. RAID groups drives into one volume. RAID 0 stripes data across the drives for speed with no redundancy, so losing any one drive loses the data. RAID 1 mirrors two drives. RAID 5 stripes data with parity spread across all the drives and can rebuild any one lost drive. RAID 6 keeps two sets of parity, also spread across all the drives, and survives two lost drives. RAID 10 stripes across mirrored pairs, so it survives a drive failure too. The lesson video draws RAID 5 and RAID 6 with separate parity drives. In both, the parity is spread across every drive; a separate parity drive is RAID 4.

What you'll learn

Aligned to

CompTIA Tech+
6.7 Explain business continuity concepts.
6.1 Summarize confidentiality, integrity, and availability concerns.
2.5 Compare and contrast storage types.
CompTIA A+ Core 1
3.3 Given a scenario, select and install storage devices.
CompTIA Server+
1.2 Given a scenario, deploy and manage storage.

Key terms

Redundancy
The duplication of critical components or systems to increase reliability and availability.
Disk Mirroring
A storage redundancy technique that writes identical data to two or more drives simultaneously, so that if one drive fails, data remains accessible from the other.
RAID 0
A RAID configuration that stripes data across two or more drives to improve read and write performance, but provides no fault tolerance — losing any one drive loses all data.
RAID 1
A RAID configuration that mirrors identical data simultaneously across two drives, providing full redundancy so that the array continues operating if either drive fails.
RAID 5
A RAID configuration that stripes data and distributed parity across three or more drives, providing read performance gains and the ability to survive the failure of any single drive.
RAID 6
A RAID configuration that stripes data across four or more drives with two independent sets of parity, allowing the array to survive the simultaneous failure of any two drives.
RAID 10
A RAID level that combines striping and mirroring, delivering both improved performance and redundancy but requiring a minimum of four drives.
Location Redundancy
The practice of distributing duplicate systems or services across geographically separate sites to protect against localized failures or disasters.

Topics

Redundancy Availability Raid Disk Mirroring High Availability Interactive Streak Sort

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