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Appendix D:
Creating Bootable Disks
From Non-Bootable Drives
In order to create a bootable disk image from a non-bootable drive, use the
XFORMAT function with the /N flag. Refer to the example below:
XFORMAT /N=6 /B=D: C:\FLASH
This example assumes that the D: drive is a non-bootable device, such as a network
drive or a RAM disk, and contains the necessary system files; that DOS 6 is the
operating system; and that files from the C:\FLASH directory will be copied to the
system disk.
The drive specified by the /B= option must contain the system files
COMMAND.COM, IO.SYS and MSDOS.SYS in addition to the BB6.00 boot
block file. These files are automatically copied to the flash disk root directory when
the disk is made bootable. If these system files are not present, an error message
displays and XFORMAT fails.
Since the IO.SYS and MSDOS.SYS files are hidden (i.e., do not display when using
a DIR command), it is necessary to unhide them so that the DOS COPY command
can transfer the files. For example, to reveal the attributes set for the MSDOS.SYS
file, type the following:
ATTRIB MSDOS.SYS
Letters that display include S (system file), H (hidden file) and R (read-only). To
prepare the hidden file MSDOS.SYS for copying, type either of the following:
ATTRIB -s -h MSDOS.SYS
or
ATTRIB MSDOS.SYS -s -h
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