Emergency Booting Windows PCs: Another Use for Linux - www.reallylinux.com
Emergency Booting Windows PCs:
Another Use for Linux
By Mark Rais, author of Linux for the Rest of Us and Linux evangelist.
Can there be still more to add to the
list of useful functions a live Linux CD offers? This brief article
reviews the use of Linux as a means of emergency booting a failed
Windows PC and accessing potentially lost files. Linux as a boot OS is
fairly common today. For instance, DELL often ships its servers with
Windows driver disks that actually use a micro-Linux boot.
However, I discovered another truly invaluable use for Live Linux
CDs when my friend Mitch asked me to come over and help him with a
very urgent need. His business report was due the next morning, but
at the last moment his Microsoft Windows laptop failed to boot and he lost his
"A few more edits and I'd have been finished, but now I can't
even start up Windows," Mitch said as he clutched his hair.
He was ready to use the Windows emergency boot disk, and if that
didn't work to fling his laptop and himself out the window. I
recommended an alternative.
"He was ready to fling...
his laptop and himself
out the window"
Even if the Windows emergency boot worked, how would he finish
editing and then printing out the report? Instead I suggested he use a
Linux Live-CD. My hunch was that although the Windows OS failed to
boot, his files were in tact. So, I pulled a Knoppix Linux Live-CD
from my bag and asked him to insert it into his drive. For those who
are unfamiliar with the term, a Live-CD allows you to boot Linux from
the CD-ROM into memory without touching the OS on the hard disk.
But before he booted, I asked him if he
had a USB RAM card, or a CD-RW drive? Unfortunately, his laptop
didn't include a CD-RW to backup his files, and he did not have any
other means of backing up his vital report. I looked around the
room. Spotting his Minolta Digital camera, I asked if it was working
and if he had the USB cable for it. Mitch handed me the camera and
cable. I inserted it into the laptop USB slot just before I booted
On Mitch's laptop, I needed to press
F12 to choose the CD-ROM as the boot device. Then within seconds
Knoppix began to load.
Once loaded, the first step was to mount both the Windows hard
disk and the Minolta camera's memory disk.
Pressing the right mouse button and choosing 'mount' did the
trick and quickly his camera memory card and his failed Windows PC
files were accessible.
The failed Windows hard disk was mounted as hda1 and the Camera
memory disc was mounted as sda1.
Since I decided to use the camera's memory card as a place to back
up his vital report, I had one more step. I needed to make the
camera readable and writable. By default, Knoppix and most other
Live-CDs come with all drives read only.
I pressed the right mouse
button, chose the option Actions then the option to Change read/write mode.
It was time to bring up his report and let him make his final
edits. I clicked on the Windows hard disk drive icon. Now I had to traverse the Windows directories.
First I chose Documents and Settings, then his personal folder (usually your name), and finally the My Documents folder. Spotting the report I double clicked on it
and waited while OpenOffice loaded.
"Wow," Mitch exclaimed as he saw his report appear,
ready for editing! He quickly made his last few changes and then it
was time to save a backup of his report.
From the OpenOffice menu, I chose File, then Save As. On the file
save screen I pressed the up directory icon. In Mitch's case I
needed to press it five times. If you're trying something similar,
you need to press the icon until you get to the /mnt directory.
There you will find all of the disk drives that are mounted for
use under Linux. I chose the sda1 folder and then saved his report
file to the memory disc on his camera. He now had a backup of the
file off the failed Windows system. He could easily connect his
camera and transfer the file to his work computer tomorrow morning.
I showed Mitch how to unmount the disk drives (same process as mounting them in the first place), and a few other goodies found under the Knoppix main menu. Thanks to Linux we were able to quickly retrieve Mitch's report even on a fried Windows PC, save it, and still have time for some games.
More importantly, Mitch was willing to actually try fully installing Linux. I quickly yanked a stack of Linux CDs from my bag and responded,
"when you're ready, use these to install Linux."
Many additional guides for new users are also available on the
Linux Help page. Microsoft, Windows, and Microsoft Office are the trademarks or registered trademarks of Microsoft Corporation in the United States and Internationally. Linux is a registered trademark of Linus Torvalds. All other trademarks and registered trademarks are the property of their respective companies.