Learn about the technologies behind the Internet with The TCP/IP Guide!|
NOTE: Using robot software to mass-download the site degrades the server and is prohibited. See here for more.
Find The PC Guide helpful? Please consider a donation to The PC Guide Tip Jar. Visa/MC/Paypal accepted.
|View over 750 of my fine art photos any time for free at DesktopScenes.com!|
The operating system files that allow a hard disk to be booted are normally placed at the front of the disk at the time that the boot volume is high-level formatted, using the FORMAT command with the /S parameter. It is also possible, however, to "convert" an existing disk so that it is bootable, by using the SYS command. SYS copies the operating system files from the volume that the system was booted with (hard disk or floppy) to the target volume. SYS is, essentially, the "/S" parameter of the FORMAT command, without the rest of the FORMAT command itself--it only moves the system files, and doesn't erase the target disk. Note that it only copies the very basic startup files, either for DOS or the DOS that underlies Windows. It will not copy an entire Windows installation, for example!
Today, SYS is rarely used for hard disks. Its most common use is to create bootable floppy disks from non-bootable floppy disks. It is also sometimes used to upgrade DOS versions on hard disks of older machines; you boot the floppy of the new DOS version and then SYS the new operating system files to the hard disk. Again, modern operating systems take care of this sort of work internally, and don't require this sort of manual operation.
Tip: You can make a bootable
floppy from within Windows as well, so you don't really need SYS for this either. Just
open the Control Panel, double-click "Add/Remove Programs" and then click the
"Startup Disk" tab for instructions.