Bissoy.com
Doctors Medicines MCQs Q&A

Which of the following RAID (Redundant Array of Independent Disks) levels uses large stripes meaning that one can read records from any single drive and allows to use of overlapped I/O for read operations?

Which of the following RAID (Redundant Array of Independent Disks) levels uses large stripes meaning that one can read records from any single drive and allows to use of overlapped I/O for read operations? Correct Answer RAID 4

Explanation:

RAID (redundant array of independent disks) is a way of storing the same data in different places on multiple hard disks or solid-state drives (SSDs) to protect data in the case of a drive failure. There are different RAID levels, however, and not all have the goal of providing redundancy.

RAID works by placing data on multiple disks and allowing input/output (I/O) operations to overlap in a balanced way, improving performance. Because using multiple disks increases the mean time between failures, storing data redundantly also increases fault tolerance.

RAID Levels:

RAID devices use different versions, called levels. The original paper that coined the term and developed the RAID setup concept defined six levels of RAID -- 0 through 5. This numbered system enabled those in IT to differentiate RAID versions.

RAID 4 levels uses large stripes meaning that one can read records from any single drive and allows to use of overlapped I/O for read operations

RAID 4: This level uses large stripes, which means a user can read records from any single drive. Overlapped I/O can then be used for read operations. Because all write operations are required to update the parity drive, no I/O overlapping is possible.

Additional InformationRAID 0: This configuration has striping but no redundancy of data. It offers the best performance, but it does not provide fault tolerance.

RAID 1: Also known as disk mirroring, this configuration consists of at least two drives that duplicate the storage of data. There is no striping. Read performance is improved since either disk can be read at the same time. Write performance is the same as for single disk storage.

RAID 2: This configuration uses striping across disks, with some disks storing error checking and correcting (ECC) information. RAID 2 also uses a dedicated Hamming code parity, a linear form of ECC. RAID 2 has no advantage over RAID 3 and is no longer used.

RAID 3: This technique uses striping and dedicates one drive to storing parity information. The embedded ECC information is used to detect errors. Data recovery is accomplished by calculating the exclusive information recorded on the other drives. Because an I/O operation addresses all the drives at the same time, RAID 3 cannot overlap I/O. For this reason, RAID 3 is best for single-user systems with long record applications.

RAID 5: This level is based on parity block-level striping. The parity information is striped across each drive, enabling the array to function, even if one drive were to fail. The array's architecture enables read and write operations to span multiple drives. This results in performance better than that of a single drive, but not as high as a RAID 0 array.

Related Questions

Consider the following statements: Any element connected in 1. Series with an ideal current source is redundant. 2. Parallel with an ideal current source is redundant. 3. Series with an ideal voltage source is redundant. 4. Parallel with an ideal voltage source is redundant. Which of the above statements is/are correct?
A teacher asked the class to subtract 5 from 75.70% of the class said: 25. Their work was shown as: \(\begin{array}{*{20}{c}} {\begin{array}{*{20}{c}} 7&5 \end{array}}\\ {\underline {\begin{array}{*{20}{c}}\ { - 5} \ \ \ &{} \end{array}} }\\ {\underline {\begin{array}{*{20}{c}} 2&5 \end{array}} } \end{array}\) Which of the following describes the most appropriate remedial action that the teacher should take to clarify this misconception?
You are the administrator of a Windows 2000 Server computer that has one hard disk. This computer runs a custom application that writes a large number of small temporary files in a single directory to support request from client computers. To improve performance of the application, you add three new 100-GB SCSI disks to the server to hold these temporary files. You want to ensure that the application can use all 300 GB of space with a single drive letter. You also want to ensure the fastest possible performance when writing the temporary files. How should you configure the three disks?
You want to provide complete redundancy for all data stored on your hardware RAID 5 array. You install second h/w Raid 5. You want to create a mirror set of the original array. However when you right click the free space on new array you see no option to create a new volume or mirrrored volume. What should you do?
Study the following information carefully and answer the questions that follows. 5 persons Anil, Bhagat, Ishan, Deepak and Parmish use 5 different apps namely, WhatsApp, Instagram, Twitter, Facebook and LinkedIn. They all wear different brands of shoes namely, Adidas, Reebok, Nike, Puma and Vans. The person who wears Puma shoes does not uses Facebook. Parmish wear Nike shoes and uses LinkedIn app. Anil who wear Adidas shoes but neither uses Facebook nor Twitter. Ishan neither wear Vans nor Puma shoes but he uses Twitter app. The person who uses WhatsApp doesn’t wear Adidas shoes. Bhagat uses Facebook app. Deepak wear which shoes brand, and also determine who uses Instagram?
A class III mathematics teacher gave the following questions to her students:  \(\begin{equation} \frac{ \begin{array}[b]{r} 256 \\ + 173 \end{array} }{ } \end{equation}\) \(\begin{equation} \frac{ \begin{array}[b]{r} 28 \\ + 32 \end{array} }{ } \end{equation}\) \(\begin{equation} \frac{ \begin{array}[b]{r} 129 \\ + 76 \end{array} }{ } \end{equation}\) Later she asks the students to solve a worksheet that has similar questions. Which of the following statements is appropriate for the given situation?
The mean time to failure of a single disk is 200000 hrs. If an array of disks is using 5 such disks, the mttf of the array is
Your Windows 2000 Server computer contains a stripe set with parity on a four-disk array. You convert the stripe set with parity to a dynamic RAID-5 volume. Six months later, users report that disk access on the server is slower than it had been on the previous day, You use Disk Management and discover that the status of the third disk in the array is Missing. You want to recover the failed RAID-5 volume. What should you do first?
Your Windows 2000 Server computer contains a stripe set with parity on a four-disk array. You convert the stripe set with parity to a dynamic RAID-5 volume. Six months later, users report that disk access on the server is slower than it had been on the previous day. You use Disk Management and discover that the status of the third disk in the array is missing. You want to recover the failed RAID-5 volume. What should you do first?
A material is loaded elastically under plane stress condition given by the following tensor:
\[\left[ {\begin{array}{*{20}{c}} 1 \\ 0 \end{array}\begin{array}{*{20}{c}} 2 \\ 1 \end{array}\begin{array}{*{20}{c}} 0 \\ 0 \end{array}} \right