IBM L40 SX, Quick Reference

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Identifying Diskettes
A 1MB diskette looks like this:
It is usually labeled 1.0MB
capacity or 2DD and has
a square cutout
A 2MB diskette looks like this:
It has the letters HD is usually
labeled 2.0MB capacity and has
two square cutouts
Formatting Diskettes
A diskette must be formatted to prepare it for use. Your operating
system manual describes the commands for formatting diskettes.
When using commands that format a diskette before writing (for
example, the DOS command DISKCOPY), be sure the target
diskette has the appropriate storage capacity.
1MB Diskettes must be formatted to 720KB. You can do this with
either a 720KB or 1.44MB diskette drive. When you use a 1.44MB
diskette drive, be sure to specify a format of 720KB; otherwise the
diskette will be formatted to 1.44MB with unpredictable results.
2MB Diskettes must be formatted to 1.44MB. To do this, you must
use a 1.44M8 diskette drive.
Appendix A. Additional Information 84