RAID Review
Which of the following drive configurations uses striping with parity for fault tolerance?
RAID 5 also uses disk striping, but provides fault tolerance for a single disk failure. Disk striping breaks data into units and stores the unites across a series of disks by reading and writing to all disks simultaneously. RAID 0 uses disk striping and offers no fault tolerance. A failure of one disk in the set means all data is lost. RAID 1 provides fault tolerance but does not use striping. A RAID 10 array nests a mirrored array within a striped array.
What is the minimum number of hard disks that can be used to configure RAID 10?
A RAID 10 array nests a mirrored array within a striped array. To create a RAID 10 array, a minimum of four hard disks is required (two for the mirrored array and two more to stripe the mirror)
You have been asked to implement a Raid 5 solution for an engineer's desktop workstation. What is the minimum number of hard disks that can be used to configure RAID 5?
A RAID 5 array stripes data and parity information across multiple hard disks. To complete RAID 5 array, a minimum of three hard disks is required. A RAID 0 and a RAID 1 can both be implemented with a minimum of two hard disks.
You are configuring a new system, what actions will you take as part of the configuration?
If using an onboard RAID controller with SATA drives, edit the SMOS settings and identify the drive type as RAID. This tells the system to load the onboard BIOS for accessing the connected drives. If you want to install the operating system on a RAID array, you will need to manually load the controller driver so that Windows can see the RAID array.
You are configuring a new system, which of the following actions will you take as part of the configuration?
If using an onboard RAID controller with SATA drives, edit the SMOS settings and identify the drive type as RAID. This tells the system to load the onboard BIOS for accessing the connected drives. If you want to install the operating system on a RAID array, you will need to manually load the controller driver so that Windows can see the RAID array.
You have three hard disk. A raid 0 volume uses space on disk 1 and disk 2. RAID 1 volume uses space on Disk 2 and Disk 3. Disk 2 fails. What happens?
In this scenario, Disk 2 is shared between both volumes. If disk 2 fails, The RAID 1 volume is still accessible because RAID 1 (mirrored) volumes can sustain a loss of a single disk. The data on the RAID 0 volume is not accessible. RAID 0 uses striping, which distributes the data evenly between multiple disks. If a single disk fails, the entire volume is lost.
Which Raid configuration level provides increased performance using only two disks.?
RAID 0 (striping) uses two or more disks and provides an increase in performance but not fault tolerance. RAID 1 (mirroring) uses two disks to provide fault tolerance but not an increase in performance. RAID 5 uses a minimum of three disks and provides both fault tolerance and an increase in read performance.
Which of the following drive configurations uses striping without fault tolerance?
RAID 0 uses disk striping and offers no fault tolerance. Disk striping breaks data into units and stores the units across a series of disks by reading and writing to all disks simultaneously.
What is an advantage of Raid 5 over Raid 1?
RAID 5 provides both fault tolerance and improved performance. RAID 1 (mirroring) provides only fault tolerance with no performance benefit.
When you go to disk Management, the option to create the RAID 5 array is not available. What should you do?
Windows 7 desktop operating systems support creating RAID 0 and RAID 1 arrays in Disk Management, but do not support configuring RAID 5. To use RAID 5 on a client computer, you will need to use a RAID controller installed in an expansion slot or integrated in the motherboard.
When you boot the computer, Windows does not show the logical RAID drive. What should you do?
You must install the RAID driver so that Windows recognizes arrays created by the motherboard RAID utility. Without the driver, Windows will not be able to see the logical drive defined by the array. When you define the array, you configure the BIOS to use RAID as the SATA type. If you had not completed this step, you would not be able to run the RAID configuration utility. Use AHCI to configure SATA drives to support hot-swapping.