🚀 go-pugleaf

In article <1992Mar30.153626.7315@mtholyoke.edu>, mcrowley@mtholyoke.edu (Michael A. Crowley) writes:
> 
> Repeatedly enter DOS commands:  md x     cd x
> and eventually one receives "Invalid directory".  The point at which 
> this occurs seems related to the number of characters in the path,
> not to the number of directories.   md xxxxxxxx     cd xxxxxxxx  repeatedly
> 
> It is also not related to the VMS directory depth.  
> It is also not how DOS behaves locally.
> 
> I haven't seen this limitation written up in the release notes.  
> Is this a known problem?  Any solutions?

the following is extracted from 4.0 release notes (on DSN):

          o  Subdirectory Depth

               The file server does not prevent creation of
               subdirectories more than 8 levels deep. Normal RMS syntax
               does not allow you to specify more than 8 directory
               levels. Therefore, server clients can create files and
               directories which cannot be easily accessed by RMS and
               which are not backed up by the default form of the VMS
               BACKUP command.

               However, subdirectories up to 16 levels deep can be
               accessed using rooted-directory syntax. Also, the
               BACKUP/IMAGE command causes files to be backed up and
               restored correctly regardless of subdirectory depth.

So you can expect to have a problem doing a selective restore on anything more
than 8. 
also, doesn't dos maintains a memory structure for each device that maintains a
text string in memory  of the current path (pwd) on that device. This is what
the "lastdrive=" controls. I thought that was about 80 bytes per drive?

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