  System Disk BACKUP, Cleanup? 
 The Question is:
 
Hello, How are you ?
 
We have many servers of digital such as VAX 4000/60, 90, 90A  with Open VMS
(6.1) and many Alpha  Stations 2004/100 with digital Unix 4.1.  I have faced
certain typical problems and I would like to get clarify from your expert
advisor.
 
We use these servers for the process control as MMI with POS 30 of ABB
Procontrol system.  We connect  servers to Procontrol system via TS50
module. Which communicates with the server by CPS.
 
Q1.   All of a sudden my server is not working, ie. Not executing any
commands, so I have to prepare another hard disk (because of hard disk
problem).  How to copy complete hard disk including  operating system and
application programs, (my configuration
files and mimic files) from healthy server/hard disk.  I would like to know
complete flow of  commands clearly ?
 
Q2.  How frequently we have to "Purge" the files ? How to test the
limitation of memory in order to purge the files ?  I use this command to
purge the files.
(server name)_LOG&gt;PURGE SYS$SYSDEVICE:(000000)*.*
With this command whether it purges files only in the root directory or
completely in the selected hard disk..  Is there any procedure to purge
files in the system?
 
Q2.  What is the procedure to do the same in the Unix based systems (we use
Alpha 164 LX with Unix)?
 
 
 The Answer is:
 
  Please contact your third-party application vendor (ABB Procontrol)
  for their application management and maintenance recommendations.
 
  If you have a non-functional system disk, you will want to perform an
  installation of the relevent products.
 
  If you have a partially functional system disk, you will want to
  perform an immediate (verified) system disk BACKUP.
 
  If you have a functional hard disk and wish to transfer the contents
  to another disk, please see the OpenVMS System Manager's manual:
 
    http://www.openvms.digital.com:8000/
 
  particularly the information on creating and restoring an image BACKUP
  of the system disk.  Details on changing the node name -- if this is
  a factor -- are included in the OpenVMS FAQ.
 
  Questions of when files can be purged depend highly on the particular
  application.  Most tolerate the purge operation nicely.  Some don't.
  Contact the application vendor for assistance.
 
  You can use the command:
 
    $ PURGE/KEEP=3 SYS$SYSDEVICE:[*...]*.*
 
  to purge all but the three most recent versions of all files on the
  system disk.  (Prior to this or any other potentially unrecoverable
  system disk file manipulations, the OpenVMS Wizard would strongly
  encourage you to make (/VERIFY or otherwise) a system disk BACKUP.)
 
  You will want to contact the resident UNIX Wizard for assistance with
  UNIX questions.
 
