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Question 1. You he been tasked to implement a disk fault tolerance strategy for your pany. The disk set should make the most efficient use of disk space and it should also he the fastest access time of all the fault tolerance disk sets under Windows NT. What disk set should you implement?

a . Disk striping without parity.

b. Volume set

c. Disk duplexing

d. Disk striping with parity

Disk mirroring ( duplexing ) only make use of 50% of disk space. Therefore, you can eliminate C. Disk striping without parity and volume sets do not provide any fault tolerance. Of all of Windows NT's fault toelerance disks sets, Disk striping with parity prvodies the most efficient use of disk space. It, along with disk striping without parity, provides the fatest read operations of all of NT's disk sets.

Question 2. You need to implement a disk fault tolerance strategy for your pany.

Required result : Disk operations must be able to continue if one member fails.

Optional results : The boot partition must be part of the disk set. Disk write operations must be optimized.

Proposed soulition : Implement disk striping without parity.

Which results does the proposed solution produce?

a. The proposed solution produces the required result and the optional results.

b. The proposed solution produces the required result and produces only one of the optional results

c. The proposed solution produces the required result but it does not produce any of the optional results.

d. The proposed solution does not produce the required result or the optional results.

Although, it is always a good practive to map the proposed solution to the optional results, there are some instances when mapping the proposed solution to the required result is useful. You should do step 2 first only if the presented required result is simple, like in this scenario. By doing step 2 first in this question, the required result is not satisified. When the required result is not satisifed, then the only possible answer is D. Disk striping wihtout parity does not provide any fault tolerance. Therefore, if one or more member fails in the set, disk operations cannot continue. The required result is not satisified.

Question 3. Your pany is currently using disk mirroring. You he been tasked to implement a new fault tolerance strategy.

Required result : Disk operations must be able to continue if two members fail.

Optional results : Read operations should be faster than disk mirroring. The system and CPU overhead should be less than disk mirroring.

Proposed solution : Implement disk striping with parity.

Which results does the proposed solution produce?

a. The proposed solution produces the required result and the optional results.

b. The proposed solution produces the required result and produces only one of the optional results

c. The proposed solution produces the required result but it does not produce any of the optional results.

d. The proposed solution does not produce the required result.

Required result : A ) Disk operations must be able to continue if two members fail.

Optional results : B ) Read operations should be faster than disk mirroring. C ) The system and CPU overhead should be less than disk mirroring.

Proposed solution : 1 ) Implement disk striping with parity.

Map 1 to B : A stripe set with parity, along with a stripe set without parity, provides the fastest read operation out of all NT's disk sets. One optional result is satisified.

Map 1 to C : In a stripe set with parity, the CPU is required to calculate the parity bits before writing them to disk. Therefore, the write operations of a stripe set with parity is the slowest out of all NT's disk sets. Optional result C is not satisified. Result of step 1 : Only one optional result is satisified. You can eliminate answer A.

Map 1 to A : In a stripe set with parity, if one member fails than disk operations can continue. However, if two or more members fail, then disk operations will stop until the failed members are replaced and data is restord from tape backup.

Count : The required result is not satisified. When the required result is not satisified, then there can only be one possible answer.

Question 4. True or False. A volume set does not provide fault tolerance, but it does provide an increase in disk performance.

a . True.

b. False.

A volume set is just a collection of free disk space. A volume set does not provide fault tolerance nor does it provide any increase in disk performance.

Question 5. You he a Windows NT server, SMALLNT, in a resource domain that is running an SQL database. Users in all trusted domains are accessing the database on SMALLNT, which only has one hard drive. How can you implement a fault tolerance strategy on SMALLNT?

a . By adding two more hard drives and implementing RAID level 1.

b. By adding two more hard drives and implementing a volume set.

c. By adding two more hard drives and implementing RAID level 5.

d. By adding a second hard drive and implementing RAID level 1.

RAID level 1 : Stripe set without parity does not provide any fault tolerance. You can eliminate A and D.

R

AID level 5 : Stripe set with parity provides fault tolerance. You need a mnium of three members and up to a maximum of 32.

Volume set : Provides no fault tolerance and no performance increase. A volume set is just a collection of free hard disk space bined into a logical drive.

Question 6. You he ten hard disks configured as a stripe set with parity on your Windows NT Server puter. On a certain day, two members in the set fails. What must you do to restore the stripe set with parity?

a . Replace the failed members and regenerate the data through the Regenerate mand in the Fault Tolerance menu.

b. Replace the failed members and reboot the puter. Then use the Windows NT Backup to restore the data.

c. Replace the failed members and recreate the stripe set with parity. Restore the data from tape backup.

d. Replace the failed members and reboot the puter. Windows NT will automatically regenerate the data.

In a stripe set with parity, you can he 3 - 32 members in the set. You must he a minimum of 3.

If 1 member in a stripe set with parity fails ====>Disk operations will continue. To recreate the stripe set with parity, replace the failed member and regenerate the parity bits through the Disk Administrator.

If 2 or more members in a stripe with parity fails ====>Disk operations will stop. To recreate the stripe set with parity, replace the failed members, recreate the stripe set with parity, and restore data from tape backup.

Question : On member in your stripe set with parity fails. Under what circumtance will Windows NT automatically recreate the parity stripes?

Answer : Never. You he to replace the failed memeber and manually recreate the parity stripes through the Disk Administrator.

Question 7. True or False. Disk operations can continue in a volume set if one member in the set fails, but it cannot continue if two or more members in the set fails.

a. True.

b. False.

A volume set does provide any fault tolerance. If one member fails, then disk operations will stop. Only disk mirroring ( its hybrid disk duplexing ) and disk striping with parity provide fault tolerance under Windows NT.

Question 8. You he a Windows NT Server puter called BIGNT, which has three hard drives. Each hard drive has one, and only one, primary partition. The boot partition is on the first drive and the system partition is on the second drive. Using the existing configuration, what fault tolerance standard can you implement on your Windows NT server?

a . Disk mirroring.

b. Disk striping with parity.

c. Either A or B can be used..

d. You cannot implement fault tolerance given the scenario. The system parition must be on the first physical hard drive in order to implement fault tolerance.

The only possible choice is disk mirroring-- since disk mirroring is the only fault tolerance standard that can include the system or boot partition.

Answer D : The system partition ( the partition that contains the boot up files ) can be on any physical hard disk, and not necessary the first physical hard drive. You just he to change the ARC pathname in the "boot.ini" file to point to the physical disk number where the system partition resides.

Question 9. You he four hard drives on your Windows NT Server puter. You would like to use the free disk space from all four drives to create one logical drive. You would like to he the fastest read operations, and you are not concerened about fault tolerance. What is the best disk set to implement?

a . A volume set.

b. A stripe set with parity.

c. A stripe set without parity.

d. A mirror set.

A stripe set without parity provides the fastest read and write operations out of all NT's disk sets. In a stripe set without parity, information is read and written to all members simultenously. In a volume set, information is read and written to only ONE member at a time. If you want the best disk performance, and you are not concerend with fault tolerance, then a stripe set without parity is the way to go.

Question 10. You've implemented disk striping without parity on your Windows NT Server puter. There are five members in the set. On a certain day, one member in the set fails. What must you do to restore data?

a . Use Regenerate mand in the Fault Tolerance menu in Disk Administrator.

b. Use the Recreate mand in the Fault Tolerance menu in Disk Administrator.

c. Restore the data from tape backup.

d. Replace the failed member and use the Regenerate mand in the Fault Tolerance menu in Disk Administrator.

Disk striping without parity provides the fastest read and write operations. However, it does NOT provide any fault tolerance. If one member in a stripe set without parity fails, then you must restore data from tape backup.

Question : True or False. You want to change the size of the stripe set without parity. You must re-create the stripe set without parity and restore all data from backup.

Answer True. In a stripe set without or with parity, the parition of all members in the set must be the same size. If you want to change the size of the stripe set, then you must re-create the stripe set and restore data from tape backup.

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