Which of the following statements is incorrect?

A. A logical volume can reside on multiple physical disks. Data storage can be physically discontinuous.

B. A volume group is built on physical volumes. A volume group can contain one physical volume group or multiple physical volumes.

C. Physical volumes reside on the lowest layer in the logical volume manager. Logical volumes and volume groups are dependent on physical volumes.

D. Multiple volume groups can be created on the space of a logical volume.

What is the main purpose of backup battery units (BBU) in storage controllers?

A. To maintain the power for clock synchronization.

B. To power the interface modules.

C. To provide additional power to storage controller to speed up the I/O.

D. To ensure that the non completed I/O is not lost during power outage.

Match the RAID level with the characteristics. (1) RAID 0 (2) RAID 5 (3) RAID 10 (4) RAID 6 (a) Cost effective (b) Allows double disk failure (c) Highest performance (d) No data protection

A. 1-a; 2-d; 3-b; 4-c

B. 1-d; 2-a; 3-c; 4-b

C. 1-d; 2-a; 3-b; 4-c

D. 1-a; 2-b; 3-c; 4-d

The restore time objective (RTO) specifies the time needed to recover the data and servers after after a disaster has occured,

A. TRUE

B. FALSE

Statement 1: Virtual Tape libraries allow for a highly scaleable backup strategy as storage can be added later. Statement 2: Virtual Tape Libraries should be used when remote datacenters are NOT available.

A. Statements 1 and 2 are both true.

B. Statement 1 is true and statement 2 is false.

C. Statement 1 is false and statement 2 is true.

D. Both statements 1 and 2 are false.