\r\ndd if=\/dev\/zero of=fdos-250m-hdd.img bs=1M count=250\r\n<\/pre>\nLaunch qemu and install FreeDOS into the empty image:<\/p>\n
\r\nqemu-system-x86_64 -hda fdos-250m-hdd.img -cdrom fdbasecd.iso -boot d\r\n<\/pre>\nAfter installing FreeDOS you have to copy the BIOS updater tool to the image. To do that follow this steps:<\/p>\n
\r\n~# fdisk -ul fdos-250m-hdd.img\r\nGNU Fdisk 1.2.5\r\nCopyright (C) 1998 - 2006 Free Software Foundation, Inc.\r\nThis program is free software, covered by the GNU General Public License.\r\n\r\nThis program is distributed in the hope that it will be useful,\r\nbut WITHOUT ANY WARRANTY; without even the implied warranty of\r\nMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r\nGNU General Public License for more details.\r\n\r\n\r\nDisk \/home\/user\/fdos-250m-hdd.img: 261 MB, 261660672 bytes\r\n16 heads, 63 sectors\/track, 507 cylinders, total 511056 sectors\r\nUnits = sectors of 1 * 512 = 512 bytes\r\n\r\n Device Boot Start End Blocks Id System \r\n\/home\/user\/fdos-250m-hdd.img1 * 63 511055 255496 e FAT16 LBA\r\n<\/pre>\nThe partition starts at 63, so to get the offset, we have to multiply 63 by 512, 32256. To mount the partition you have to run this command:<\/p>\n
\r\n~# mount -o loop,offset=32256 fdos-250m-hdd.img \/mnt\/\r\n<\/pre>\nAnd copy the required tool:<\/p>\n
\r\n~# mkdir \/mnt\/DELL\r\n~# cp PER410-011200.exe \/mnt\/DELL\/\r\n~# umount \/mnt\r\n<\/pre>\nOnce you have your FreeDOS image ready, copy the image to your server to \/boot\/images. Create the directory \/boot\/images if it does not exist.<\/p>\n
Prepare grub2 to use memdisk<\/p>\n
\r\n$ sudo cp -a \/usr\/lib\/syslinux\/memdisk to \/boot\r\n<\/pre>\nCreate the following file with your preferred editor:<\/p>\n
\r\n~# cat \/etc\/grub.d\/50_memdisk \r\n#!\/bin\/sh\r\n\r\nset -e\r\n\r\nIMAGES=\/boot\/images\r\n. \/usr\/lib\/grub\/grub-mkconfig_lib\r\nif test -e \/boot\/memdisk ; then\r\n MEMDISKPATH=$( make_system_path_relative_to_its_root "\/boot\/memdisk" )\r\n echo "Found memdisk: $MEMDISKPATH" >&2\r\n find $IMAGES -name "*.img" | sort | \r\n while read image ; do\r\n IMAGEPATH=$( make_system_path_relative_to_its_root "$image" )\r\n echo "Found floppy image: $IMAGEPATH" >&2\r\n cat << EOF\r\nmenuentry "Bootable floppy: $(basename $IMAGEPATH | sed s\/.img\/\/)" {\r\nEOF\r\n prepare_grub_to_access_device ${GRUB_DEVICE_BOOT} | sed -e "s\/^\/\\t\/"\r\n cat << EOF\r\n linux16 $MEMDISKPATH bigraw\r\n initrd16 $IMAGEPATH\r\n}\r\nEOF\r\n done\r\nfi\r\n<\/pre>\nAnd finally update grub with your new image:<\/p>\n
\r\n$ sudo update-grub\r\nGenerating grub configuration file ...\r\nFound linux image: \/boot\/vmlinuz-3.13.0-68-generic\r\nFound initrd image: \/boot\/initrd.img-3.13.0-68-generic\r\nFound memtest86+ image: \/memtest86+.elf\r\nFound memtest86+ image: \/memtest86+.bin\r\nFound memdisk: \/memdisk\r\nFound floppy image: \/images\/fdos-250m-hdd.img\r\ndone\r\n<\/pre>\nReboot and boot from your new image.<\/p>\n","protected":false},"excerpt":{"rendered":"
In this post I am explaining the steps you can follow to boot from a DOS image using your grub to update the server’s BIOS version without the need of using a USB drive attached to your server. To check your BIOS version in your server run this command: $ sudo dmidecode –type bios # […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[163,165,164],"_links":{"self":[{"href":"https:\/\/elkano.org\/blog\/wp-json\/wp\/v2\/posts\/1198"}],"collection":[{"href":"https:\/\/elkano.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/elkano.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/elkano.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/elkano.org\/blog\/wp-json\/wp\/v2\/comments?post=1198"}],"version-history":[{"count":10,"href":"https:\/\/elkano.org\/blog\/wp-json\/wp\/v2\/posts\/1198\/revisions"}],"predecessor-version":[{"id":1210,"href":"https:\/\/elkano.org\/blog\/wp-json\/wp\/v2\/posts\/1198\/revisions\/1210"}],"wp:attachment":[{"href":"https:\/\/elkano.org\/blog\/wp-json\/wp\/v2\/media?parent=1198"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/elkano.org\/blog\/wp-json\/wp\/v2\/categories?post=1198"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/elkano.org\/blog\/wp-json\/wp\/v2\/tags?post=1198"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}