[Info-vax] Anyone interested in another public access system

[Bob Koehler]

In article <gs2jtk$c44$4 at naig.caltech.edu>, glen herrmannsfeldt <gah at ugcs.caltech.edu> writes:
> 
> I am not sure what it was called, but I remember in VMS 1.0
> it was possible to rename a directory into itself, such that
> the disk blocks disappeared.  There was some process for 
> recovering such lost blocks.  That process may also have
> defragmented the disk.

   Proir to VMS 3.0, you recovered lost blocks via:

   $ mcr vfy2

   The above was the precursor to ANALYZE/DISK_STRUCTURE/REPAIR

   And you saved a disk image with

   $ mcr dsc2

   Which was the precursor to BACKUP/IMAGE, and like BACKUP/IMAGE an
   output disk would be defragmented.  But there was no online disk
   defreagmenter from DEC until after they implemented IO$_MOVE many
   years later.