zxing barcode generator example c# Part 4: Storage and File Management in Visual C#.NET

Create Quick Response Code in Visual C#.NET Part 4: Storage and File Management

Part 4: Storage and File Management
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Microsoft Windows XP Inside Out, Second Edition
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Checking Properties and Status of a Disk or Partition
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As with previous Windows versions, you can check the properties of any drive including its volume label, file system, and the amount of free space available from the My Computer window. Right-click the drive icon and choose Properties from the shortcut menu. You can see the same details and more by starting from Disk Management. Most of the key information is visible in the volume list, shown by default at the top of the window, with slightly less information available in the graphical view at the bottom of the window. Of particular interest is information about the status of a disk or volume. Figure 18-8 shows where to look for this information.
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Disk status information Volume status information
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Figure 18-8. The Disk Management utility displays information about the status of each physical disk and volume.
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Under normal circumstances, the status information displayed here should report that each disk is online and each volume is healthy. Table 18-1 lists all possible disk status messages you may see on a system running Windows XP Professional or Home Edition, along with suggested actions you should take to resolve possible errors.
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Part 4: Storage and File Management
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18
Managing Disks and Drives
Table 18-1.
Disk Status
Description
The disk is configured correctly and has no known problems. The operating system encountered errors when reading or writing data from a region of the disk. (This status message appears on dynamic disks only.) The disk was once available but is not currently accessible. The disk might be physically damaged or it might be disconnected. (This status message appears on dynamic disks only.)
Status
Online Online (Errors)
Action Required
None. Right-click the disk and choose Reactivate Disk to return its status to Online. If errors continue to occur, check for damage to the disk. Check the physical connections between the disk and the power supply or disk controller. After repairing connections, right-click the disk and choose Reactivate Disk to return its status to Online. If the damage cannot be repaired, delete all volumes, right-click the disk, and choose Remove Disk. Right-click the disk and choose Import Foreign Disks.
Offline
Foreign
The disk was originally installed on another computer and has not yet been set up for use on your computer. (This status message appears on dynamic disks only.) All or part of the disk may be physically damaged, or (in the case of a dynamic disk) the dynamic disk database may be corrupted.
Unreadable
Restart the computer. If the problem persists, right-click the disk and choose Rescan Disks. If the status is still unreadable, some data on the disk may be recoverable with third-party utilities. After you reconnect or power on the missing disk, right-click the disk and choose Reactivate Disk to return its status to Online.
Missing
The disk is corrupted, disconnected, or not powered on. (This status message appears on dynamic disks only.)
Part 4: Storage and File Management
18
Microsoft Windows XP Inside Out, Second Edition
Table 18-1.
Disk Status
Description
The disk does not contain a valid signature. It may have been prepared on a system running a non-Microsoft operating system, such as UNIX or Linux, or the drive may be brand new. A disk is not inserted in the drive. (This status message appears only on removable media drives, such as Zip drives and CD-R/CD-RW drives.)
Status
Not Initialized
Action Required
If the disk is used by another operating system, do nothing. To prepare a new disk for use with Windows XP right-click the disk , and choose Initialize Disk. Insert a disk in the drive and choose Action, Rescan Disks.
No Media
Tip Tackle disk problems first Almost without fail, a disk problem will generate a status indicator for both the disk and any volumes on that disk. For instance, if you see a disk with Online (Errors) in the Status column, you re likely to see Healthy (At Risk) as the volume s status. In this case, your best bet is to try to resolve the disk problem first. If you can successfully do so, the problems with the volume will usually clear up as a matter of course. Table 18-2 describes volume status messages you re likely to see.
Table 18-2.
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