Q165503: Description of the File System Troubleshooting Options
Article: Q165503
Product(s): Microsoft Windows 95.x Retail Product
Version(s): 95
Operating System(s):
Keyword(s): kbenv kbtool diskmem win95 kbDiskMemory
Last Modified: 28-JUL-2001
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The information in this article applies to:
- Microsoft Windows 95
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SUMMARY
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The System tool in Control Panel contains a set of options for changing file
system performance settings. You can use these options when you experience
hardware or software compatibility problems.
NOTE: Enabling any of the file system troubleshooting options may seriously
degrade system performance.
MORE INFORMATION
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To display the file system troubleshooting options, follow these steps:
1. In Control Panel, double-click System.
2. Click the Performance tab.
3. Click File System.
4. Click the Troubleshooting tab.
The following table describes the settings on the Troubleshooting tab:
File system option Description
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Disable New File This option alters the internal rules for file
Sharing And sharing and locking on hard disks, governing
Locking Semantics whether certain processes can have access to
open files in certain share modes that guarantee
a file will not be modified. This option should
be checked only in the rare case that an
MS-DOS-based application has problems sharing
under Windows 95. This sets SoftCompatMode=0 in
the registry.
Disable Long Name This option turns off the tunneling feature,
Preservation For which preserves long filenames when files are
Old Programs opened and saved by applications that do not
recognize long filenames. This option should be
checked in the rare case that an important legacy
application is not compatible with long
filenames. This sets PreserveLongNames=0 in the
registry.
Disable Protected- This option prevents Windows 95 from terminating
Mode Hard Disk interrupts from the hard disk controller and
Interrupt Handling bypassing the ROM routine that handles these
interrupts. Some hard disk drives might require
this option to be checked in order for interrupts
to be processed correctly. If this option is
checked, the ROM routine handles the interrupts,
which slows system performance. This sets
VirtualHDIRQ=0 in the registry. (This setting is
off by default for all computers in Windows 95,
which is the reverse of Windows 3.x.)
Disable All 32-Bit, This option ensures that no 32-bit disk drivers
Protected-Mode are loaded in the system, except the floppy
Disk Drivers driver. Typically, you would check this option
if the computer does not start due to disk
peripheral I/O problems. If this option is
enabled, all I/O will go through real-mode
drivers or the BIOS. Notice that in this case,
all disk drives that are visible only in
protected mode will no longer be visible. This
sets ForceRMIO=1 in the registry.
Disable Write- This option ensures that all data is flushed
Behind Caching continually to the hard disk, removing any
For All Drives performance benefits gained from disk caching.
This option should be checked only in the rare
cases where you are performing risky operations
and must ensure prevention of data loss. For
example, a software developer who is debugging
data at Ring 0 while creating a virtual device
driver would check this option. This sets
DriveWriteBehind=0 in the registry.
Each option sets a value in the following registry key:
Hkey_Local_Machine\System\CurrentControlSet\Control\FileSystem
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Keywords : kbenv kbtool diskmem win95 kbDiskMemory
Technology : kbWin95search kbZNotKeyword3
Version : 95
Hardware : x86
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