CD File systems...
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Ok, here's something strange: A colleague brought to me a CD-RW disk that has a curious feature: when you read it using an NT-system, you see a set of files. When you read it on an XP-system, you see an entirely different set of files. Further exploration (props on the CD drive), shows that the NT machine sees a file system called CDFS, whereas the XP machine sees something called UDF. Anybody know what's going on here? My guess was that the older NT machine does not know about UDF, but XP does. But then, why does XP not recognize CDFS? And, is there a way to get either machine to see both file systems? Let me add that I know nothing about CD file systems; I'm just guessing here. 'til next we type... HAVE FUN!! -- Jesse
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Ok, here's something strange: A colleague brought to me a CD-RW disk that has a curious feature: when you read it using an NT-system, you see a set of files. When you read it on an XP-system, you see an entirely different set of files. Further exploration (props on the CD drive), shows that the NT machine sees a file system called CDFS, whereas the XP machine sees something called UDF. Anybody know what's going on here? My guess was that the older NT machine does not know about UDF, but XP does. But then, why does XP not recognize CDFS? And, is there a way to get either machine to see both file systems? Let me add that I know nothing about CD file systems; I'm just guessing here. 'til next we type... HAVE FUN!! -- Jesse
UDF definition[^] I'd only seen UDF on DVDs, but can apparently be used on CDs too. CDFS = CD File System, also called ISO 9660. (There's also Joilet, a MS extension to ISO 9660 that allows long filenames.) --Mike-- Ericahist | CP SearchBar v2.0.2 | Homepage | RightClick-Encrypt | 1ClickPicGrabber "That probably would've sounded more commanding if I wasn't wearing my yummy sushi pajamas." -- Buffy
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Ok, here's something strange: A colleague brought to me a CD-RW disk that has a curious feature: when you read it using an NT-system, you see a set of files. When you read it on an XP-system, you see an entirely different set of files. Further exploration (props on the CD drive), shows that the NT machine sees a file system called CDFS, whereas the XP machine sees something called UDF. Anybody know what's going on here? My guess was that the older NT machine does not know about UDF, but XP does. But then, why does XP not recognize CDFS? And, is there a way to get either machine to see both file systems? Let me add that I know nothing about CD file systems; I'm just guessing here. 'til next we type... HAVE FUN!! -- Jesse
Dual formatted CDs have been around for a while. I know they’ve been used intensely back in the day when creating a CD that can be read on both a Mac and PC (that is before Mac OS had ISO 9660 support). It would have both an ISO 9660 (with or without Joliet extensions) file system and an HFS file system for the Mac. Macs default to HFS, and Windows has its defaults too. I don’t know of a way to change these defaults in Windows, but I know it’s possible since I’ve seen some Mac compatibility programs for Windows do this. Also, AFAIK Windows Explorer does not handle multiple file systems on a volume simultaneously so you’d need 3rd party software if you wanted to go that route. Jeremy Falcon
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Dual formatted CDs have been around for a while. I know they’ve been used intensely back in the day when creating a CD that can be read on both a Mac and PC (that is before Mac OS had ISO 9660 support). It would have both an ISO 9660 (with or without Joliet extensions) file system and an HFS file system for the Mac. Macs default to HFS, and Windows has its defaults too. I don’t know of a way to change these defaults in Windows, but I know it’s possible since I’ve seen some Mac compatibility programs for Windows do this. Also, AFAIK Windows Explorer does not handle multiple file systems on a volume simultaneously so you’d need 3rd party software if you wanted to go that route. Jeremy Falcon
Jeremy Falcon wrote: Windows has its defaults too So, MS changed the default between NT and XP? Or is this just a flook resulting from the method the CD was written. It's a re-writable disk and my colleague says he wrote part of it from an XP machine and another part on an NT machine, both times using Roxio s/w. 'til next we type... HAVE FUN!! -- Jesse
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Jeremy Falcon wrote: Windows has its defaults too So, MS changed the default between NT and XP? Or is this just a flook resulting from the method the CD was written. It's a re-writable disk and my colleague says he wrote part of it from an XP machine and another part on an NT machine, both times using Roxio s/w. 'til next we type... HAVE FUN!! -- Jesse
Jesse Evans wrote: So, MS changed the default between NT and XP? My guess would be a change in default since UDF is newer than ISO 9660 and Joilet. Jeremy Falcon
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Jeremy Falcon wrote: Windows has its defaults too So, MS changed the default between NT and XP? Or is this just a flook resulting from the method the CD was written. It's a re-writable disk and my colleague says he wrote part of it from an XP machine and another part on an NT machine, both times using Roxio s/w. 'til next we type... HAVE FUN!! -- Jesse
Easy CD Creator has this lovely feature called DirectCD. It puts a small CDFS filesystem with some tools for reading UFS on older computers and computers without EasyCD installed. It then allows drag-n-drop writing on an UFS system on the rest of the disc. They are evil, I tell you. Why can't they stick to standards. They have to do stuff in strange ways.