Sure,
     In an incremental by date, the client only asks the server for the
     date and time of the last incremental backup.  This is the only
     information used to determine which files get backed up, so any
     changes that do not change the date and time are not recognized.
     If a file's last changed date and time is after that of the last
     backup, the file is backed up.  Otherwise, it is not, even if the
     file is new to the workstation.

     Also, in an incremental by date, files are not expired or rebound
     on the server, and the copy mode frequency attribute of the
     management classes is ignored.  Because they do not change the
     last changed date and time, changes to access control lists (ACL)
     are not backed up during an incremental by date.


     1) if you use some utility to write to the disk by sector/track/etc...
     an incremental by date will not detect it... that is, the change in
     the file found in that location on a given disk...
     2) if the backed up copy of the file has a last changed date of
     01/01/1997 and during a backup (incrbydate) it sees a create date/last
     changed date of 12/12/1996 it will not back up the file BUT if the
     copy oon the client has a create date / last changed date of
     01/10/1997 it will back it up...
     THIS IS THE "COULD BURN YOU" part... say you install software, it has
     no bkup copy so next incrbydate backs it up... the install software
     preserves the/a date associated with the creation of the file, then
     you move it somewhere else and the opsys puts the current time/date on
     it... then you realize you goofed for some reason and move it back to
     the origional spot... You run an incrbydate and it has a newer date
     and is backed up OK FOR NOW... BUT YOU INSTALL A PTF THAT PRESERVES
     THE DATE/TIME of file creation which happens to be before (older) that
     the date time stamp of when you yoyo'ed the file SO IT IS NOT BACKED
     UP even though it is totally new.  Later you get a big surprise !


______________________________ Reply Separator _________________________________
Subject: NO SUBJECT
Author:  ADSM-L (ADSM-L AT VM.MARIST DOT EDU) at unix,mime
Date:    2/14/97 2:13 PM


Can someone tell me in layman terms how the use of -INCRBYDATE works with
the -INCREMENTAL command?