Radio Shack TRS-80 Model II Reference Manual page 153

Utility Programs
Phase 1, Part 2
If' 'Full" option and destination disk is:
1.1
or
1.2
TRSDOS
kills certain
system files which do
not work under 2.0.
2.0
TRSDOS
kills only
those system files
whose names are in
the source diskette's
directory.
If the
'FULL'
option is not used,
TRSDOS
kills all system files on the destination
diskette (whether it is a 1.1, 1.2 or 2.0).
Phase 2
TRSDOS
now copies the system file
SYSTEM/SYS.
This is the file residing on seven
contiguous tracks following the directory.
Phase
3
TRSDOS
copies the remaining system programs (marked with an "S" in the
directory-listing attribute column). The more system files on the diskette, the
longer the
XFERSYS
operation will take.
Note: If the
XFERSYS
fails after the diskette has been partially modified, you will
get the message
INCOMPLETE Conversion
The diskette will be unusable. Make a backup from your" safe copy" and start
over.
189