  RAM disks? 
 The Question is:
 
I have heard that you can create a disk in memory with VMS (albeit small)
i.e. RAM DISK
And that VMSINSTAL utilises this ability during its installs.
Is this correct?  How do I do it?
 
 The Answer is:
 
  OpenVMS VAX uses an undocumented (and relatively inefficient) in-memory
  pseudo disk -- a RAM disk -- as part of bootstrapping standalone BACKUP
  from a tape device.  (For information, see STABACKIT.COM.)
 
  Commercial and non-commercial in-memory pseudo disk packages are available
  from various sources, including Compaq: DECram.
 
  VMSINSTAL does not use a RAM disk.
 
  OpenVMS Alpha does not need to use a RAM disk as it does not support
  bootstraps from tape devices.  (Nor does it support standalone BACKUP.)
 
