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Managing Microsoft Windows Server 2003 Disk Storage
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2. You re the administrator of a computer running Windows Server 2003. The computer s hard disk contains two data volumes: D and E. You enable disk quotas on volumes D and E that limit all users to 20 MB of total storage. However, you want to limit storage in the users home folders, stored in D:\Users, to 10 MB per user. Is this possible Why or why not Where can you implement quotas a. On any server for all disks b. On any physical disk for all volumes c. On any volume for all folders d. On any folder 3. What is the required amount of free disk space on a volume in order to provide for complete defragmentation a. 5 percent b. 10 percent c. 15 percent d. 25 percent e. 50 percent
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The Check Disk tool allows you to fix file systems errors and scan for and attempt to recover bad sectors on your hard disk. Disk Defragmenter improves performance by relocating files so that their clusters are contiguous. Disk Quotas allow you to set and monitor storage limits and, optionally, to deny write access to users exceeding those limits. Quotas are configured on a per-user, per-volume basis.
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Implementing RAID
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Lesson 4: Implementing RAID
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A disk subsystem that includes a RAID configuration enables the disks in the system to work in concert to improve performance, fault tolerance, or both. In this lesson, you will learn about the three levels of RAID that can be created and managed by Windows Server 2003. You will learn the impact that each type of volume has on performance, volume capacity, and fault tolerance, and how to recover data in the event of a disk failure in a RAID configuration.
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After this lesson, you will be able to
Identify the best RAID implementation given a particular storage requirement regarding
capacity utilization, fault tolerance, and performance
Configure a striped volume (RAID-0) Configure a mirrored volume (RAID-1) Configure a RAID-5 volume (striped with parity) Recover from a single-disk failure in a fault-tolerant volume
Estimated lesson time: 25 minutes
Lesson 1 introduced the types of storage units available on a computer running Windows Server 2003. The types of volumes that reflect RAID configurations are striped volumes, mirrored volumes, and RAID-5 volumes.
Implementing Disk Fault Tolerance
As mentioned in Lesson 1, fault tolerance is the ability of a computer or operating system to respond to a catastrophic event, such as a power outage or hardware failure, so that no data is lost and that work in progress is not corrupted. Fully fault-tolerant systems using fault-tolerant disk arrays prevent the loss of data. You can implement RAID fault tolerance as either a hardware or software solution.
Hardware Implementations of RAID
In a hardware solution, the disk controller interface handles the creation of redundant information to provide fault tolerance and the regeneration of data in the event of a failure. Some hardware vendors implement RAID data protection directly in their hardware, as with disk array controller cards. Because these methods are vendor specific and bypass the fault tolerance software drivers of the operating system, they offer performance improvements over software implementations of RAID. Consider the following points when deciding whether to use a software or hardware implementation of RAID:
Hardware fault tolerance is more expensive than software fault tolerance and might limit equipment options to a single vendor.
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Managing Microsoft Windows Server 2003 Disk Storage
Hardware fault tolerance generally provides faster disk I/O than software fault tolerance. Hardware fault tolerance solutions might implement hot swapping of hard disks to allow for replacement of a failed hard disk without shutting down the computer and hot sparing so that a failed disk is automatically replaced by an online spare.
Software Implementations of RAID
Windows Server 2003 supports one RAID implementation (striped, RAID-0) that is not fault-tolerant and two implementations that provide fault tolerance: mirrored volumes (RAID-1) and striped volumes with parity (RAID-5). You can create fault-tolerant RAID volumes only on dynamic disks formatted with NTFS. With Windows Server 2003 implementations of RAID, there is no fault tolerance following a failure until the fault is repaired. If a second fault occurs before the data lost from the first fault is regenerated, you can recover the data only by restoring it from a backup.
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