Atari DOS 2.5: XF551 Owner's Manual page 122

• You can usually use DOS Menu Option C., COPY FILE, to
copy files from an enhanced-density diskette in an XF551 to
a single-density diskette in an 810, with these limitations:
- You cannot of course copy more information than will fit on
the diskette formatted in single density, which has a smaller
capacity than a diskette formatted in enhanced density.
- You cannot copy any single file that occupies more than
707 sectors.
- You may be unable to copy files created with certain data
manipulation programs such as mailing lists, fjle managers,
and so forth; some such files can be copied only through
diskette duplication. In some cases you may be able to
copy a file but the copy may not work with the program ' s file
manager. Check the manual that came with your programs
to see if this condition applies to any of your files.
If You Have DOS 2.0S Diskette Files
Diskettes formatted and written to using OOS 2.08 are completely
compatible with DOS 2.5. Diskettes formatted in single density
and written to using OOS 2.5 are completely compatible with DOS
2.0S. In short, there is no difference in format, directory structure,
data storage capacity, file structure, and so forth between a OOS
2.08 diskette and a slngle-density OOS 2.5 diskette.
Problems of incompatibility between DOS 2.5 and OOS 2.0S
can arise in only one kind of situation: when DOS 2.08 tries to
read a diskette formatted in enhanced density and written to
using DOS 2.5. The potential problems discussed below are
based on the assumption that you have loaded OOS 2.0S from
an XF551 Disk Drive and that you are using the XF551 to
manage files on a diskette formatted in enhanced density by
DOS 2.5. In this situation DOS 2.08 can read from and write to
the enhanced-density diskette with just a few restrictions .
• DOS 2.08 knows nothing about sectors numbered from 720
up.
So
it
will not attempt to write any data to the extended
storage capacity of the enhanced-denslty diskette.
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