drvspace.hlp

Dos6.22安装软件,现在使用Dos的朋友不是很多了,希望能大家一些方便.

To enlarge the compressed drive, specify a smaller amount of free space for the uncompressed drive.

Increasing the Free Space on the Uncompressed Drive
---------------------------------------------------
You might want to reduce the size of a compressed drive if you need more free space on the host drive. You can reduce the size of a compressed drive only if it contains free space. 

To increase the amount of free space on the uncompressed drive, specify a larger amount of free space for the uncompressed drive.

Note: To reduce the size of a compressed drive as much as possible, 
      first run the MS-DOS Defragmenter, DEFRAG.EXE, on that drive. 

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 Help -- Change Compression Ratio

In the Change Compression Ratio dialog box, you can change the "estimated compression ratio"~HL87~ of a drive.

The estimated compression ratio is a number that %N uses to calculate the amount of free space on a compressed drive. You might want to change this ratio if it differs greatly from the actual compressibility of the files you plan to store.

For example, you might want to specify a higher estimated compression ratio if you plan to store extremely compressible files such as bitmap files. You might want to specify a lower ratio if you will store files that will not compress much further, such as certain program (.EXE or .COM) files.

Note: Changing a drive's estimated compression ratio does not 
      affect how much %N actually compresses the files 
      on that drive; it changes only the way %N estimates 
      the free space on the compressed drive.

Having the wrong estimated compression ratio for your files can cause %N to provide inaccurate space estimates to MS-DOS, which can, in turn, result in problems when storing files. If the ratio is too high, %N overestimates the amount of free space; the DIR command might then report that more space is free than is actually available. If the ratio is too low, MS-DOS might be unable to copy a file even though there may be plenty of space for that file.

Note: To find out the actual compression ratio of each of your 
      existing files, type DIR /C at the command prompt.

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 Help -- Mount a Compressed Drive

In the Mount a Compressed Drive dialog box, you can choose the drive you want to mount. 

A compressed drive resides in the root directory of your disk as a hidden file with a filename such as %S.001. This file is called a "compressed volume file"~HL84~ (CVF). When you mount a CVF, %N associates it with a drive letter so you can use the files that CVF contains.

The Mount a Compressed Drive dialog box lists all the unmounted compressed volume files it finds on your computer. To mount one of them as a compressed drive, press the UP ARROW or DOWN ARROW keys to select it, and then choose OK or press ENTER.

Related Topic
-------------
  "Unmounting a Compressed Drive"~HL98~
  "Working with Floppy Disks"~HL89~ 

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 Help -- Unmount Confirmation

In the Unmount Confirmation dialog box, you can confirm that you want to unmount a compressed drive. To confirm that you want to unmount the specified drive, choose OK.

Unmounting a compressed drive makes the files on it temporarily unavailable. To make the files available again, remount the drive by choosing the Mount command from the Drive menu.

An unmounted drive resides in the root directory of your disk as a "compressed volume file"~HL84~ -- a hidden file with a filename in the form %S.nnn (for example, %S.001). 

CAUTION: Do not delete the compressed volume file. Doing so will 
         delete the compressed drive and all the files on it.

Related Topic
-------------
  "Mounting an Unmounted Compressed Drive"~HL95~

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 Help -- Format a Compressed Drive 

In the Format a Compressed Drive dialog box, you can instruct %N to format the specified drive.

CAUTION: If you format a compressed drive, all the files it 
         contains will be permanently erased. Formatting a 
         compressed drive erases its contents and leaves the empty 
         compressed volume file on your disk.

To format the selected drive, choose OK.

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 Help -- Format Confirmation

You have just confirmed that you want to format the currently selected compressed drive. 

This is the last chance you will have to confirm the Format command. To format the specified drive, choose Yes. 

CAUTION: If you format a compressed drive, all the files it 
         contains will be permanently erased. Formatting a 
         compressed drive erases its contents and leaves the empty 
         compressed volume file on your disk.

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 Help -- Delete a Compressed Drive

In the Delete a Compressed Drive dialog box, you can instruct %N to permanently delete a compressed drive and its associated compressed volume file.

To delete the selected drive, choose OK.

CAUTION: When you delete a drive, you also delete all the files it 
         contains. Deleting a compressed drive removes the 
         compressed volume file from your disk.

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 Help -- Delete Confirmation

You have just confirmed that you want to delete the currently selected compressed drive. This is the last chance you will have to confirm the deletion. To delete the drive, choose Yes.

CAUTION: When you delete a drive, you also delete all the files 
         it contains. Deleting a compressed drive removes the 
         compressed volume file from your disk.

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 Help -- Defragment a Compressed Drive

In the Defragment a Compressed Drive dialog box, you can confirm that you want to defragment the specified drive. To defragment the selected drive, choose OK.

Defragmenting a compressed drive moves all the data to the beginning of the compressed volume file and all the free space to the end. Unlike defragmenting an uncompressed drive, it does not reorganize the files on the drive so that they are stored contiguously. Defragmenting a compressed drive has no effect on its speed. 

You should defragment a compressed drive before you reduce its size. If you do, you might be able to reduce the drive's size more than you otherwise could.

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 Help -- Stop Defragmenting a Compressed Drive

You pressed the ESC key while %N was defragmenting your compressed drive. 

If you want to stop defragmenting and return to the main %N screen, choose Yes.

To resume the defragmentation process, choose No.

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 Help --  %N Chkdsk

Previous versions of %N included the %N Chkdsk command (%S /CHKDSK) for checking the validity of the specified compressed drive. 

Instead of the %N Chkdsk command, MS-DOS 6.2 includes the new ScanDisk program, a full-featured disk analysis and repair utility. ScanDisk can check and repair both uncompressed drives and %N drives. It can even check and repair unmounted %N compressed volume files.

To run ScanDisk, quit %N, and then type SCANDISK at the command prompt. 

For more information about ScanDisk, type HELP SCANDISK at the command prompt.

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 Help -- Options 

In the %N Options dialog box, you can set the following options, which determine how %N interacts with your drives:

Last drive reserved for %N's use
   To mount a compressed drive, a drive letter must be available
   to assign to %N.  %N reserves some drive
   letters based on the number of compressed drives you have.
   If you run out of drive letters while compressing or mounting a 
   drive, increase this number. Each drive letter uses about 120 
   bytes of memory; to conserve memory, decrease this number. 

Number of removable-media drives
   In general, you should set this field to the number of 
   removable-media drives you have. (Floppy-disk drives, Bernoulli 
   drives and Flash memory cards are all removable-media drives.) 
   You might want to specify fewer removable-media drives than you 
   actually have if you do not plan to compress the data in those 
   drives and you want to conserve memory.


Enable automounting
   If this option is checked, then %N will automatically
   mount compressed floppy disks and other removable media. You can 
   save about 4K of memory by disabling this option. If you do, 
   you will have to mount compressed removable drives yourself, by
   using the Mount command.

Enable DoubleGuard safety checking
   DoubleGuard constantly checks the validity of the memory 
   %N is using. If another program were to change the 
   data %N is storing in memory, the data on your drive 
   could be damaged. To prevent other programs from damaging
   your data, DoubleGuard shuts down your computer immmediately if
   it detects any unauthorized changes to %N's memory.

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 Help -- Options 

In the %N Options dialog box, you can set the following options to determine how %N interacts with your drives:

Last drive reserved for %N's use
   To mount a compressed drive, a drive letter must be available
   to assign to %N.  %N reserves some drive
   letters based on the number of compressed drives you have.
   If you run out of drive letters while compressing or mounting a 
   drive, increase this number. Each drive letter uses about 120 
   bytes of memory; to conserve memory, decrease this number. 

Number of removable-media drives
   In general, you should set this field to the number of 
   removable-media drives you have. (Floppy-disk drives, Bernoulli 
   drives and Flash memory cards are all removable-media drives.) 
   You might want to specify fewer removable-media drives than you 
   actually have if you do not plan to compress the data in those 
   drives and you want to conserve memory.


Enable automounting
   If this option is checked, then %N will automatically
   mount compressed floppy disks and other removable media. You can 
   save about 4K of memory by disabling this option. If you do, 
   you will have to mount compressed removable drives yourself, by
   using the Mount command.

Enable DoubleGuard safety checking
   DoubleGuard constantly checks the validity of the memory 
   %N is using. If another program were to change the 
   data %N is storing in memory, the data on your drive 
   could be damaged. To prevent other programs from damaging
   your data, DoubleGuard shuts down your computer immmediately if
   it detects any unauthorized changes to %N's memory.

Read DoubleSpace drives
   If this option is checked, DriveSpace can mount and read
   DoubleSpace drives without requiring that you first convert
   them to DriveSpace format. You can save about 5K of memory by
   disabling this option.

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 Help -- Using Help 

Using the Help Window
---------------------
To scroll more Help information into view, use the following:

    * The PAGE UP and PAGE DOWN keys
    * The arrow keys
    * The scroll bar to the right of the dialog box

To choose a button at the bottom of the Help window, press TAB or SHIFT+TAB until the button is selected, and then press ENTER. Or, use the mouse to click the button you want.

To close the Help window, press ESC or choose the Close button.

Viewing Help Topics
-------------------
Help displays related topics in a different color. To view a related topic, press TAB to select the topic you want, and then press ENTER. Or, use the mouse to click the topic name.

To select the previous topic name, press SHIFT+TAB.

Getting Instant Help
--------------------
To get instant help on a message or dialog box, press F1 or choose the Help button.

Using the Help Index
--------------------
To view an index of Help topics, choose the Index command from the Help menu.

To view the Help index from the Help window, press TAB to select the Index button, and then press ENTER. Or, click the Index button.

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 Help -- About

The About dialog box displays the current version number of Microsoft %N. To close the About dialog box, press ESC or choose OK.




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 Help -- Incompatible Hardware or Software

This error message usually indicates that your computer is running disk-caching software that might be incompatible with %N. This message also appears if your computer has a hardcard that is configured as drive C. 

If You Are Running Incompatible Disk-Caching Software
-----------------------------------------------------
If you run %N while using incompatible disk-caching software, you could lose some or all of the files on your computer. Before running %N, carry out the following procedure:

1. Edit your CONFIG.SYS and AUTOEXEC.BAT files and remove any 
   commands that start incompatible disk-caching software. (Microsoft 
   SMARTDrive is compatible with %N, so you do not need to 
   remove commands that start SMARTDrive.) Save your changes to both 
   files.
2. Restart your computer by pressing CTRL+ALT+DEL.
3. Restart %N.

For additional information, see the Troubleshooting %N section of the README.TXT file.

If You Have a HardCard Drive Installed
--------------------------------------
If your computer includes a hardcard drive that is configured as drive C, %N cannot compress that drive. However, %N can compress your other drives, including other hardcard drives. 

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 Help -- Defragment Again?

%N cannot continue the current operation because there is not enough contiguous free space on the drive you selected. %N ran the Microsoft Defragmenter to try to gain more contiguous free space, but Defragmenter either did not finish or could not recover additional contiguous space. 

  * To have %N run Defragmenter again, choose Yes.
    You might want to run Defragmenter again if it was
    accidentally interrupted, or if this is the first time
    you have received this error message.

  * If you have already answered Yes to this error message once,
    or if you are sure Defragmenter was not interrupted, choose No.
    Then, quit %N and run ScanDisk on the drive. When 
    ScanDisk is complete, restart %N and try carrying
    out the operation (for example, resizing the drive) again.

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 Help -- More Memory Required

%N must allocate additional conventional memory before it can create or mount additional compressed drives. To complete your task, do the following:

  1. Restart your computer by choosing Yes.
  2. After your computer starts, restart %N.
  3. Try carrying out your task again. (For example, if you were 
     trying to create a new compressed drive when you received this
     message, you would choose the Create New command from the
     Compress menu.)

To continue using %N, choose No. You will return to the main %N screen. However, you will not be able to complete your task until you have restarted your computer.