what other method to accomplish the task?

You work as the Project Manager for company.com Inc. You need to migrate from your current
Project Server version to Project Server 2010. Hence, you want to create a backup of the Project
Web Access databases. You can use the backup and restore operation through the SharePoint
Central Administration Web site or what other method to accomplish the task?

A.
RAID 1 redundancy

B.
Copy the file structure to disk imaging software.

C.
Back up the entire disk drive through RAID 5.

D.
T_SQL_BACKUP command

Explanation:
You can use either the backup and restore operations or the T_SQL_BACKUP command to create a
backup of the Project Web Access databases.
Answer option A is incorrect. RAID 1 mirrors the contents of the disks, making a form of 1:1 ratio
realtime backup. The contents of each disk in the array are identical to that of every other disk in the
array. A RAID 1 array requires a minimum of two drives. Although RAID 1’s writing process copies the
data identically to all drives, a RAID 1 mirror would not be suitable as a permanent backup solution
since RAID architecture by design allows for certain failures to take place. RAID 1 does offer fault
tolerance, but it is not a backup mechanism.
Answer option B is incorrect. Disk imaging can create an image of the disk, but it would only restore
the exact same disk image, not the SQL database you are trying to backup.
Answer option C is incorrect. RAID-5 supports striped-with-parity. It contains a minimum of three
disks. In this disk system, data along with its
parity bits is stored across multiple disks. When a file is written to a RAID-5 volume, the file splits to
all the disks in the set excluding the final
disk. The final disk contains the parity information. This parity information allows the disks in the
array to keep functioning, in case a disk in the
set fails. Due to data redundancy, RAID-5 provides fault tolerance. RAID 5 offers fault tolerance
through stripe sets with parity, but it is not a backup option.
What is RAID?
RAID is described as a redundant array of inexpensive disks. It is a technology that allows computer
users to achieve high levels of storage reliability from low-cost and less reliable PC-class disk-drive

components, via the technique of arranging the devices into arrays for redundancy. RAID is now
used as an umbrella term for computer data storage schemes that can divide and replicate data
among multiple hard disk drives. The different schemes/architectures are named by the word RAID
followed by a number, as in RAID 0, RAID 1, etc. Various designs of RAID involve two key design
goals: increased data reliability or increased input/output performance. When multiple physical
disks are set up to use RAID technology, they are said to be in a RAID array. This array distributes
data across multiple disks, but the array is seen by the computer user and operating system as one
single disk. RAID can be set up to serve several different purposes.