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1. Start Visual C# 2008 Express Edition by clicking Start, All Programs, Microsoft Visual C# 2008 Express Edition. 2. Create a new Windows Forms application by using any of the techniques shown in the previous chapters; for instance, you can use either the File menu or the New Project icon in the toolbar. Name the new application MyOwnBrowser. 3. On the design surface, you ll see the empty form with a title bar named Form1. Click the title bar once. By default, you don t see the Properties window. To view it, select the View menu, and then select Properties Window (or press F4). Look at the Properties window on the bottom right of the IDE, as shown in Figure 4-1.

By extending the simple volume on the same disk. The volume remains a simple volume. By extending a simple volume to include unallocated space on other disks on the same computer. This creates a spanned volume.

space. During the compression routine, the computer crashed and now will not start Windows. What steps can Melanie take to complete the compression process and hopefully regain access to Windows XP

If the simple volume is the system volume or the boot volume, you cannot extend it. For more information about determining which volumes are the system and boot volumes, see Converting Basic Disks to Dynamic Disks later in this chapter.

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Spanned volumes combine areas of unallocated space from multiple disks into one logical volume. The areas of unallocated space can be different sizes. Spanned volumes require at least two disks, and you can use up to 32 disks. When creating spanned volumes, keep these points in mind:

his computer. Melanie does not want to tamper with compressing another volume, and the user doesn t have any files on the computer that can be deleted to free up more disk space. What other options does Melanie have

You can extend only NTFS volumes or unformatted volumes. After you create or extend a spanned volume, you cannot delete any portion of it without deleting the entire spanned volume. You cannot stripe spanned volumes. Spanned volumes do not provide fault tolerance. If one of the disks containing a spanned volume fails, the entire volume fails, and all data on the spanned volume becomes inaccessible.

Striped volumes improve disk I/O performance by distributing I/O requests across multiple disks. Striped volumes are composed of stripes of data of equal size written across each disk in the volume. They are created from equally sized, unallocated areas on two or more physical disks. In Windows XP Professional, the size of each stripe is 64 kilobytes (KB). Striped volumes cannot be extended and do not offer fault tolerance. If one of the disks containing a striped volume fails, the entire volume fails, and all data on the striped volume becomes inaccessible.

Melanie could implement the following solutions:

A mirrored volume is a fault-tolerant volume that provides a copy of a volume on another physical disk. Mirrored volumes provide data redundancy by duplicating the information contained on the volume. The two volumes that make up a mirrored volume are known as mirrors. Each mirror is always located on a different disk. If one of the physical disks fails, the data on the failed disk becomes unavailable, but the system continues to operate by using the unaffected disk. Mirrored volumes are available only on computers running the Windows 2000 Server and Windows Server 2003 operating system families. Mirrored volumes are not available on computers running Windows XP.

A RAID-5 volume is a fault-tolerant volume that stripes data and parity across three or more physical disks. Parity is a calculated value that is used to reconstruct data if one physical disk fails. When a disk fails, the volume continues to operate by re-creating the data that was on the

Part II:

14

Microsoft Visual C# 2008 Express Edition: Build a Program Now!

fails. When a disk fails, the volume continues to operate by re-creating the data that was on the failed disk from the remaining data and parity. RAID-5 volumes are available only on computers running the Windows 2000 Server and Windows Server 2003 operating system families. RAID-5 volumes are not available on computers running Windows XP.

You can convert a basic disk to dynamic by using Disk Management or by using DiskPart, a command-line tool that provides the same functions as Disk Management. When you convert a disk to dynamic, the following events occur: