Type: External (1.0 and later)
SYS [source] d:
Purpose: Transfers the operating system files to another disk.
You can use the SYS command to transfer system files to a disk only
- The disk has been formatted but DOES NOT contain files or a volume
- The disk has been formatted using either a /S or a /B format
- You cannot reliably transfer system files to a disk that already has a
different version of DOS on it.
The system files are hidden files that do not appear when you use the DIR
command to display a directory of a system disk.
When you use the SYS command to transfer the system files to a disk, the
COMMAND.COM (which contains the command processor) is not transferred.
use the COPY command to transfer COMMAND.COM.
A system disk can also be transferred (along with all the files stored on
using the DISKCOPY command.
If an error is encountered, SYS will not transfer the system files. DOS
report one of the following error messages:
Message: No room for system on target disk
Meaning: This message means that there is not enough room on the
disk for the system files. It does not necessarily mean that the disk is
already filled with stored files; it may mean that the disk was not
using the /S or the /B format options (both format the disk and reserve
for the system files).
Message: Incompatible system size
Meaning: The system files do not take up the same amount of space
target disk as the new system will need. This can happen if you try to
system files to a disk that already has a different version of DOS on it.
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