PhL
asked on
MSCDEX /E under DOS 6.22 ?
Is there some risk of using the /E option in MSCDEX for DOS 6.22 ?
I have some problem with SMARTDRV (without the /U option)
writing bad DIR on my hard disk.
Is it possible that DOS4GW would make the think worst ?
Or placing SMARTDRV and/or MSCDEX in High Memory?
Mscdex.exe /E lets your CD-ROM use expanded memory, if available. Smartdrive /U disables your CD-ROM caching. The Smartdrive /U will therefore override the /E command. Since you are having difficulties with SMARTDRV, I would limit the cache available to Windows by using a large InitCacheSize and a small WinCacheSize in the autoexec.bat.
ASKER
I think both things can go together...
PhL...
Didn't we cover this one??
Regards
Didn't we cover this one??
Regards
PhL...
An if I didn't here it is:
Command Line Switches
The following is the command line for MSCDEX.EXE:
MSCDEX.EXE: /D:x /M:n /E /V /L:x /S /K
The following table defines the MSCDEX.EXE command-line switches:
Switch Definition
/D:<device name> - Allows you to specify a name for the device driver. This name must be identical to the device name used in the CONFIG.SYS file.
/M:<n> - Specifies the number of sector buffers used to cache the path table of a CD-ROM disk. Typically, each drive should have a minimum of four to five buffers. The larger this number is, the less your computer will have to read directly from the CD-ROM drive.
/E - Tells MSCDEX.EXE to use expanded memory if your system is using expanded memory.
/V - Displays information on memory usage
when you boot your PC.
/L:<drive letter> - Allows you to specify the letter you want to assign to the first CD-ROM drive.
/S - Allows the CD-ROM to be shared on MS-NET based systems.
/K - Tells MSCDEX.EXE to use any KANJI (Japanese)file structures, if present, rather than the default of alphanumeric file structures.
I hope that the above information helped to clarify the question.
Regards
An if I didn't here it is:
Command Line Switches
The following is the command line for MSCDEX.EXE:
MSCDEX.EXE: /D:x /M:n /E /V /L:x /S /K
The following table defines the MSCDEX.EXE command-line switches:
Switch Definition
/D:<device name> - Allows you to specify a name for the device driver. This name must be identical to the device name used in the CONFIG.SYS file.
/M:<n> - Specifies the number of sector buffers used to cache the path table of a CD-ROM disk. Typically, each drive should have a minimum of four to five buffers. The larger this number is, the less your computer will have to read directly from the CD-ROM drive.
/E - Tells MSCDEX.EXE to use expanded memory if your system is using expanded memory.
/V - Displays information on memory usage
when you boot your PC.
/L:<drive letter> - Allows you to specify the letter you want to assign to the first CD-ROM drive.
/S - Allows the CD-ROM to be shared on MS-NET based systems.
/K - Tells MSCDEX.EXE to use any KANJI (Japanese)file structures, if present, rather than the default of alphanumeric file structures.
I hope that the above information helped to clarify the question.
Regards
ASKER
The question is more the effect on speed between some
caching inside MSCDEX and SMARTDRV ...
caching inside MSCDEX and SMARTDRV ...
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ASKER
The point is more about the influence of /E in MSCDEX
and (not /U) in SMARTDRV on the speed and efficiency of
CD-ROM caching ...
What is the best compromise ?
About /U in Smartdrv it seems mandatory for being
able to play VIDEO-CD through an Soft Mpeg player...
and (not /U) in SMARTDRV on the speed and efficiency of
CD-ROM caching ...
What is the best compromise ?
About /U in Smartdrv it seems mandatory for being
able to play VIDEO-CD through an Soft Mpeg player...
PhL...
Your question was if there is any risk of using that /E switch.
Now the answer was NO there is no risk, I posted you more details about the use of each switch.
Again the /E switch tells the CD-Rom to use the EXPANDED memory of your system IF available.
Could you be more clear in what do you mean by "influence".
I don't get it, I'm trying to help you here.
Regards
Your question was if there is any risk of using that /E switch.
Now the answer was NO there is no risk, I posted you more details about the use of each switch.
Again the /E switch tells the CD-Rom to use the EXPANDED memory of your system IF available.
Could you be more clear in what do you mean by "influence".
I don't get it, I'm trying to help you here.
Regards
ASKER
Having a sector cached may speed the access of it !
The access time may depend on weither the sector is cached
in the Expanded memory by MSCDEX or in Extended memory
by SMARTDRV. What is the best ?
Are the caching policies the same ?
The access time may depend on weither the sector is cached
in the Expanded memory by MSCDEX or in Extended memory
by SMARTDRV. What is the best ?
Are the caching policies the same ?
PhL...
You have created a big conversation here with all my Techs.
Yet no one can give a confirmed answer what would be the difference between the 2 ways of caching the CD-ROM. They appear to say that caching is caching weither it's expanded or extented.
Speed wise?? it does not look like it's an issue here.
Hope this has reassured you for a while until I can get other opinion about that cache argument.
Regards
You have created a big conversation here with all my Techs.
Yet no one can give a confirmed answer what would be the difference between the 2 ways of caching the CD-ROM. They appear to say that caching is caching weither it's expanded or extented.
Speed wise?? it does not look like it's an issue here.
Hope this has reassured you for a while until I can get other opinion about that cache argument.
Regards
ASKER
Caching with SMARTDRV destroys VIDEO-CD reading...
Caching with MSCDEX not...
I will let the question locked for 2 weeks and then give you a C.
If you have more information, tell me !
Regards,
Caching with MSCDEX not...
I will let the question locked for 2 weeks and then give you a C.
If you have more information, tell me !
Regards,
PhL...
Where did you get this kind of information that caching with Smartdrv destroys VIDEO-CD???
Regards
Where did you get this kind of information that caching with Smartdrv destroys VIDEO-CD???
Regards
ASKER
Not physically but prevent to read data...
In fact I have ONE VIDEO-CD
It seems that you can read directories as computer data
files BUT if you try to move one of the Video files it is like
a Audio Track you cannot copy it on your hard disk.
My ATI mpeg player can play them if /U is used but not
if caching is done on the CD.
This was the meaning of destroy i.e. make unsutable for use !
In fact I have ONE VIDEO-CD
It seems that you can read directories as computer data
files BUT if you try to move one of the Video files it is like
a Audio Track you cannot copy it on your hard disk.
My ATI mpeg player can play them if /U is used but not
if caching is done on the CD.
This was the meaning of destroy i.e. make unsutable for use !