Role of OS in filesystem (was "File types")

Michael B. Brutman mbbrutman-cctalk at
Wed Aug 30 20:38:52 CDT 2006

Don wrote:
> The meta data is stored *in* the object?  So, it can't tell
> what type of object it has without *open()*-ing it?

OS/400 isn't an OS, it's a way of life. :-)

The classic 'objects' that the operating system uses aren't really in a 
filesystem.  It looks vaguely like a file system (a very flat one), but 
it isn't.  An object can be examined by paging in the header area and 
examining the type bytes embedded at a particular offset.

I don't want to clutter the list ..  to read further search for 'single 
level store' and AS/400 and that will give you the idea.


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