Epson Equity II - Manual (Page 39)

If you have a hard disk drive, take these additional precautions:
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Never turn off the computer’s power when the hard disk LED lamp is
on. The red light indicates the computer is copying data to or from
the hard disk. If you interrupt this process, you can lose data.
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Never attempt to open the hard disk unit. The disk itself is enclosed
in an air-tight container to protect it from dust.
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If you are going to move your computer (even to another part of the
room), run the MS-DOS HDSIT program to move the read/write
heads away from the recording area. See your MS-DOS (or other
operating system) manual for instructions.
Protecting your Data
To avoid losing data you store, you can copy and write-protect your
diskettes.
Making backup copies
It is a good idea to make backup copies of all your data and system
diskettes. Copy all diskettes that contain programs, such as the MS-DOS
and GW-BASIC diskettes that come with the Equity II, and use only the
copies. Store your original software diskettes in a safe place away from
your working diskettes. Copy your data diskettes regularly (preferably
every day) to keep them up-to-date, and store them away from your
originals.
The MS-DOS manual describes how to make a backup copy of your
MS-DOS system diskette. To copy your other MS-DOS diskettes, use
the DU (Disk Utility) program or the DISKCOPY command.
If you have a hard disk, keep backup copies of all your program files
on floppy disks and regularly copy important data files to floppy disks
also. For more information on backing up a hard disk, see ‘Using a Hard
Disk’ in this chapter.
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