RayLopez99 wrote:
> I have a single partition disk running on Windows XP. Can I back it
> up? Yes, but do I need a single partition (logical of course, not
> physical, as I have only one disk)? What's the best freeware for
> this? Below is one person's opinion.
>
> Of course I cannot mirror a single disk using just that disk, but does
> a program for Windows XP exist that allows you, from within XP, to
> mirror the disk image onto an external (USB) hard drive?
>
> RL
>
http://en.wikipedia.org/wiki/Backup
http://en.wikipedia.org/wiki/Disk_cloning
http://en.wikipedia.org/wiki/Disk_image
*******
If all you own is a single disk, then you'll want a second storage device,
such as an external USB hard drive. The purpose of such, is to easily make
a copy of C: for emergencies.
The software for making the backup, should support "bare metal recovery".
That is where, you use a boot CD that comes with the backup software,
to boot the computer after a hard drive failure, allowing you
to restore from the backup external disk.
By unplugging the USB external hard drive, when it is not being used, and
storing it in a safe place, you're protecting the backed up data from
natural calamities. Say, for example, lightning strikes the power lines
to your house, blowing up your computer. If the backup copy of the C: drive
is on a separate hard drive, removed from the computer electrically, then
it may survive such an event. A similar kind of event, would be
the power company having an overvoltage event, which destroys the
computer (such can happen locally, when a higher voltage line, falls
on a lower voltage distribution system).
At my former employer, we had a couple approaches similar to that.
Many years ago, backups were done to tape, the tapes were placed in
a truck at regular intervals and stored off-site. Later, tapes
continued to be used, but the tapes were *in another country*
(backups over the Internet). Such an approach is intended to cover
as many calamities as possible, so that the company could continue
to operate, even under the worst of conditions (site destroyed by
earthquake).
For disaster planning reasons, you would *never* store the copy of C:,
on C: itself. While such an idea would help with a virus or trojan
situation, it would not cover the simplest and most likely failure,
which is a failure of the hard drive itself.
Any time you waste the time making backups, they should be made
to a second hard drive. And preferably a hard drive that can be
disconnected from the computer when not in use. And if you can
afford it, use two of those drives, and rotate them regularly,
so that if one of the external drives happens to croak,
you've still got a second one. If the drives are different brands,
from a different batch, use a different brand of USB enclosure etc.,
that reduces the odds of correlated failure.
There are many kinds of backup media, such as various forms of
tape, optical discs, hard drives. Currently, hard drives are the
most convenient form of backup, as you can leave them running
unattended and not need to do any media changes to finish the
backup. Tapes can achieve that, with an "autoloader". Optical
discs can achieve that with a "jukebox", but such solutions
are not affordable for a single user. However, hard drives
are large and cheap, and are a means of battling laziness when
it comes to making backups.
Paul