Limit of CDFS.IFS filesystem-size?

Limit of CDFS.IFS filesystem-size?

Post by Ingo » Sat, 01 Jan 2005 02:20:48


some time ago (when UDF was not yet available) I experienced a 4 GB
limit in CDFS.IFS (unable to read data at the end of a full DVD). Now I
want to build bootable recovery-DVD's using the floppy images from
UpdCD(CD's already work fine).

When booting from such a CD/DVD only CDFS.IFS (and no UDF.IFS) is loaded.
Therefor it would be great to know, if the old 4 GB-limit in CDFS.IFS
still persists, or if it has been solved in newer versions of CDFS?

Regards,
Ingo


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Limit of CDFS.IFS filesystem-size?

Post by Ruediger I » Sat, 01 Jan 2005 03:09:53


I never experienced such a limit using 9 GB video DVDs.


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Limit of CDFS.IFS filesystem-size?

Post by Ingo » Sat, 01 Jan 2005 03:52:37

Ruediger Ihle schrieb:


you probably have UDF installed like me -than all is fine - till ???GB.
But when booting from the service floppies, only CDFS and no UDF nor
Unicode is available!


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Limit of CDFS.IFS filesystem-size?

Post by Scot » Sat, 01 Jan 2005 05:15:24


You may assume that few if any changes have been made in recent years to
cdfs.
-Scott
 
 
 

Limit of CDFS.IFS filesystem-size?

Post by Ruediger I » Sat, 01 Jan 2005 05:22:41


No.


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Limit of CDFS.IFS filesystem-size?

Post by Ingo » Sat, 01 Jan 2005 05:32:47

Ruediger Ihle schrieb:


really? No line in config.sys like "IFS=X:\OS2\BOOT\UDF.IFS"?
Or did you rem-out that line? I definitely had the problem with
the c't-magazine DVD till year 2002 - was a absolutely full 4.4 GB
DVD-ROM and I could see the directory, but copying a file beyond the
4GB-limit worked, but file was full of rabbish. Had to use Linux to copy
;-) at that time.
Now with UDF it is fine!

Scott,
thanks for the bad news, but anyway it is better to know than later get
trapped by mysterios phenomenons. So I will restrict my data to less
than 4 GB.

Regards,
Ingo


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Limit of CDFS.IFS filesystem-size?

Post by Ruediger I » Sat, 01 Jan 2005 06:26:07


Yes.


You can be sure that I'm able to spot the UDF entry.


Which brings up the question which file system is used on this
particular DVD. Also it might be possible that your problem is/
was not related to CDFS.IFS, but to some other component like
OS2CDROM.DMD (which has been updated several times since
2002).


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Limit of CDFS.IFS filesystem-size?

Post by Ingo » Sat, 01 Jan 2005 07:07:37

Ruediger Ihle schrieb:


Hi Riger,

yes, you probably were right - maybe also other components can be
responsible for that. By the way, if youz have got the c't-ROM-DVD
including year 2002 (later it became double-layer) try to copy the file
'ctROM\search.htm' and 'ctROM\START.HTM' from it and look at them in a
browser. That's how I discovered the problem and 'heise.de' brougt up
that idea saying: "you need UDF to access all of the DVD".

Thanks for the hints,
and a Happy New Year,
Ingo

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Limit of CDFS.IFS filesystem-size?

Post by Ruediger I » Sat, 01 Jan 2005 07:53:07


No, I don't have this DVD.


But if you still can dig it out, you might try to comment out UDF and
see, if the problem persists.


A hybrid DVD (UDF + ISO9660) with a defective ISO portion would
behave exactly like this...


--
Ruediger "Rudi" Ihle [S&T Systemtechnik GmbH, Germany]
http://www.yqcomputer.com/
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