25 July 1984

Difference between BACKMW ver 2.6 and 2.7:

New initial menu selection  R = RESTART.

After using the program on a regular basis I found it is easy to
hit ^C or misalign a disk or somehow abort BACKMW during an
incremental backup. It is a mess then trying to continue without
having to backup all that backed-up data again (like, an abort for
an open drive door after backing up 200 of 300 cylinders...)

The "R" selection in the entry menu can now be used to restart
the program. THIS WILL ONLY WORK IF ALL CRC DATA IS STILL IN RAM,
I.E. IMMEDIATELY AFTER AN ERROR OR INADVERTENT ^C ABORT, ENTERING
WITH THE ZCPR "GO" COMAMND OR VIA A 0K .COM FILE. The R command
will also work if the program is re-executed via a disk load,
as long as the CRC map is intact. The CRC map usually starts at 1A00H.

Selecting "R" before "I" and "B" will cause the CRC file loader
routine to be skipped.


15 July 1984

Difference between BACKMW ver 2.50 and ver 2.60:

1. SYSLIB3 now used in linkage

2. When during an incremental backup or recovery a CRC of EAF8 is
   encountered (indicating a cylinder of all E5s -- blank) this
   cylinder is skipped and EAF8 is entered into the CRC file.
   This speeds up operation when copying to/from a disk with large
   blank areas. You might consider running the program called "EFIVEIT"
   before backups, especially if a considerable number of files
   has been deleted.