1. Give two reasons why server computers often have connected hard drives.

Hard drive connection in form of RAID is often done to ensure data protection and fast data accesses.

2. Why is RAID 0 particularly suited to imaging and scientific work?

Due to it's high speed of data accessing.

3. What is the advantage of using drive mirroring?

You get the exact copy of your data on a different drive. In case on of them goes down, you have still another one to go with.

4. To store data. RAID levels higher than 1 require:

a. At least double the disk space
b. Up to about a third more disk space
c. Less than half the disk space

5. Where is the backup data stored in a RAID 5 system?

In the parity blocks which is spread across all the connected hard drives.

6. Which levels of RAID can reconstruct data lost in failed drives from the backup data spread across the remaining drives in the array?

RAID Level 2, 3, 4, 5 and 6.

7. Which level of RAID is the fastest?

RAID Level 0 is the fastet, along with it's hybrids RAID 10 and RAID 01.

Match the terms in Table A with the terms in Table B.

a. RAID

Redundant array of inexpensive disks.

b. RAID Controller

A device for controlling a set of hard disks

c. An Array

A set

d. Striping

A process of spreading data across a set of disks.

e. Mirroring

The technique of writing the same information to more than one drive.

f. Parity data

Information which is used to restore data if one of the RAID drives fail.

a. Small disks tend to have lower seek times than large disks.

True

b. RAID controllers make one large hard disk act like a set of small disks.

False

c. In RAID Systems, one disk is filled with data before the next disk is used.

False

d. A higher nummbered RAID array uses more elaborate system to protect the integrity of data.

True

e. RAID 0 provides good data recovery.

False

f. Small file servers do not usually use RAID level 3.

True