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What is a RAID controller and what bennefits would you receive?
RAID stands for "Redundant Array of Inexpensive/Independent Disks". RAID works by combining two or more hard drives. It can increase performance and/or data redundancy and/or capacity. There are many different RAID types, the most common being RAID 0 (stripe), RAID 1 (mirror) and RAID 5 (stripe with parity).In a RAID 0 (stripe) array, data is split equally between the number of disks in the array. For example, when a 2 MB file is written to a RAID 0 array with two hard drives, the file is split in to two parts and 1 MB of data is written to each hard drive. This increases capacity and performance, but sharply decreases redundancy since only one of the drives needs to fail for all information to be lost.Performance = Drive Speed * Number of DrivesCapacity = Drive Size * Number of DrivesRedundancy allows for no drives to fail.In a RAID 1 (mirror) array, a complete copy is written to each hard drive in the array. Capacity and performance stay the same, but redundancy is increased. As long as one drive works, you will not lose data.Performance = Drive SpeedCapacity = Drive SizeRedundancy allows for all but one drive to fail.In a RAID 5 (stripe with parity) array, you need at least three hard drives. Files are split up to all but one of the drives (similar to RAID 0) and a parity bit is written to the last drive. This increases performance, capacity and redundancy. Performance is not as good as RAID 0, but still better than RAID 1. Redundancy is not as good as RAID 1, but is still quite reliable.Performance = Drive Speed * (Number of Drives - 1) (Theoretical)Capacity = Drive Size * (Number of Drives - 1)Redundancy allows for one drive to fail.There are other RAID levels, but they are not as common.The main benefit of using a RAID array is data redundancy and/or performance.Non-commercial (home) users and enthusiasts wanting a very large increase in performance (theoretically multiples of the number of drives used) usually go for RAID 0 since they often are not too worried about drive failure and they enjoy the larger drive capacities that it provides.Small businesses who only need cheap redundancy usually go for RAID 1. If one drive fails, the drive can be replaced and the mirror array restored.Larger businesses or those needing file/database performance go for RAID 5. They can afford the price of an extra drive and a more expensive RAID controller. RAID 5 provides high performance with large capacities while still maintaining data redundancy and is the most desirable in a business or enterprise environment.There are some other options for RAID such as RAID 10 or RAID 01.RAID 10 features two separate RAID 0 arrays which are then mirrored in a RAID 1 array.RAID 01 is the opposite, with two separate RAID 1 arrays which are then striped with a RAID 0 array.There are other non-standard RAID levels, but most are rather uncommon.Alternatively, there is also drive spanning (aka JBOD), but this provides no extra redundancy or performance. Drives are "glued", if you will, end to end.The benefits of each RAID level vary. The type of RAID used depend on the job it must fulfill.
What is a fault tolerance measure known as disk striping with parity?
RAID-5 provides data redundancy by using parity. Parity is a calculated value used to reconstruct data after a failure. While data is being written to a RAID-5 volume, parity is calculated by doing an exclusive OR (XOR) procedure on the data. The resulting parity is then written to the volume.
Three multiplexing techniques is used to combine analog signals?
WDM and FDM
What does raid stand for?
"Redundant Array of Independent Disks"or you can also say"Redundant Array of Inexpensive Disks"RAID means you have your computers Hard drives linked to work in sync with each other,this could be used to back up data instantly or used to make your Hard drives all work as one big storage device.If you had two 500GB drives and put them in RAID you could make them act as one 1TB drive,the data would be split between the two drives.Redunant Array of Independant Disks.
What are the key differences between supervised and unsupervised data mining techniques and how do they impact the outcomes of the analysis?
Supervised data mining techniques require labeled data for training, while unsupervised techniques do not. Supervised methods are used for prediction and classification tasks, while unsupervised methods are used for clustering and pattern recognition. The choice of technique impacts the accuracy and interpretability of the analysis results.
The most common form of RAID used on modern networks relies on what techniques?
C: disk striping with distributed parity AKA RAID 5
What type of siren is used in 'Blockbuster' by The Sweet?
The siren used in "Blockbuster" by The Sweet is a standard air raid siren, typically used for emergency signals. It adds a dramatic effect to the song, enhancing its energetic and intense atmosphere.
What techniques can be used to enhance the quality of a blurred image?
To enhance the quality of a blurred image, techniques such as sharpening, noise reduction, and deblurring algorithms can be used. These techniques help to improve the clarity and sharpness of the image by reducing blurriness and enhancing details.
How do you make a sentence with the word reliability?
Reliability used in a sentence: "Can you really count on the reliability of your cell phone over your house phone?"
Have you ever used a Raid bug fogger to eliminate pests in your home?
No, I have never used a Raid bug fogger to eliminate pests in my home.
Have you ever used a raid cockroach bomb to get rid of pests in your home?
I have never used a raid cockroach bomb to get rid of pests in my home.
How many disks can be used for RAID 1?
The total no. of disks that are required to make RAID 1 is 3
If a test yields consistent results every time it is used, it has a high degree of?
reliability
What aircraft was used in the first bombing raid on Tokyo?
The famous Doolittle Raid that was launched from an aircraft carrier used B-25 Mitchell bombers.
What is mirror disk?
A mirror disk, also known as a mirrored disk or RAID-1, is a data storage technique that involves duplicating data on two separate hard drives simultaneously. This provides data redundancy in case one disk fails, allowing for continued operation and data integrity. Mirror disks are commonly used in RAID configurations to improve data reliability and availability.
Whay primary technique are used in Product Support Analysis (PSA)?
Product Support Analysis (PSA) primarily employs techniques such as Reliability Centered Maintenance (RCM), Failure Modes and Effects Analysis (FMEA), and Maintainability Analysis. RCM focuses on optimizing maintenance strategies based on the reliability of components, while FMEA systematically identifies potential failure modes and their impacts. Additionally, Maintainability Analysis assesses how easily a product can be maintained, ensuring efficient support throughout its lifecycle. Together, these techniques help enhance product reliability and reduce lifecycle costs.
What is the external raid used for?
The external raid is used as a portable high-performance dual-drive storage system. This is used to store highly sensitive data on an external hard drive.
