Windows Legacy OS forum

General discussion

Can I reboot from external hard drive?

by The Riff / August 3, 2007 9:07 PM PDT

I'm just about to reformat my computer but in case I muck it up somehow I want to make a back up of my xp system and save it on my external hard drive. Will I be able to boot my computer from this back up file if it all goes pear shaped and do I need a program like Acronis True Image Home or will windows back up utility do the same thing?

Sorry guys I'm a computer newbie and any help will be greatly appreciated.

Post a reply
Discussion is locked
You are posting a reply to: Can I reboot from external hard drive?
The posting of advertisements, profanity, or personal attacks is prohibited. Please refer to our CNET Forums policies for details. All submitted content is subject to our Terms of Use.
Track this discussion and email me when there are updates

If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.

You are reporting the following post: Can I reboot from external hard drive?
This post has been flagged and will be reviewed by our staff. Thank you for helping us maintain CNET's great community.
Sorry, there was a problem flagging this post. Please try again now or at a later time.
If you believe this post is offensive or violates the CNET Forums' Usage policies, you can report it below (this will not automatically remove the post). Once reported, our moderators will be notified and the post will be reviewed.
Collapse -
by MarkFlax Forum moderator / August 3, 2007 9:33 PM PDT

The BIOS could only boot up from a CD/DVD disk, and not from an external hard drive. The BIOS, (Basic In Out System), is what is started as soon as the computer is powered up, and it checks and sets the computer hardware components, and allows Windows to start. The BIOS would need to be set to boot from a CD first. Most BIOS' do nowadays, but not all.

I've never quite understood Windows own backup utility. To use it to recover data you need Windows to be running, so if you don't have Windows you fall at the first hurdle. Therefore, it seems to me, a full backup of Windows using its own native backup doesn't work. It can be used to backup selected areas, but for those I would just use CD/DVD or an external disk and copy the files over.

For a true safety net, like you said, you would need a utility like Norton's Ghost or Acronis' True Image. With TrueImage, (which is what I use), you can create a true image of the whole Operating System and if you ever need to recover from a fatal crash you can use the TrueImage CD itself to boot up from, then it will be able to access the external drive.

However, perhaps the easiest way is just to copy all of your important and cannot lose personal files to the external, (documents, videos, photos, music, email settings, bookmarks or favorites, address book, etc), and then use the original XP CD to repair, or perform a format and clean install, then copy those files back from the external.

There's never an easy way to do this, and all can be susceptible to failure. But if you have those files copied to backup at least you don't lose them.

Since even external hard disks can fail, I would also backup those files to CD/DVD. They are less prone to failure.


Collapse -
I can boot from my external USB hard disk but no XP!
by R. Proffitt Forum moderator / August 3, 2007 9:51 PM PDT

All versions of Windows from Microsoft do not run from external USB or Firewire drives.

However other operating systems such as Linux and BSD can.

The answer also depends on your BIOS. Today most can boot from USB.

-> About your backup plan. Let me comment on G4u COPYDISK. It's free, easy (for me) to use and can copy your disk to an image file to be restored later. But since the speed of USB is what it is most will stop doing this after a short while. 100GB across USB is well over a hour or 2. What works better is to save our own files to be restored after we restore the OS from the restore CDs.


Collapse -
What I've done. . .
by Coryphaeus / August 3, 2007 10:05 PM PDT

Use the hard drive clone program that comes with a new hard drive. Clone the drive to the new drive, USB will work. Although as is stated above, you can't boot from that external USB drive, you can swap drives inside the PC case.

Collapse -
Thanks guys....
by The Riff / August 4, 2007 10:45 AM PDT
In reply to: What I've done. . .'ve been a great help.

Thanks again

Popular Forums
Computer Help 49,613 discussions
Computer Newbies 10,349 discussions
Laptops 19,436 discussions
Security 30,426 discussions
TVs & Home Theaters 20,308 discussions
Windows 10 360 discussions
Phones 15,802 discussions
Windows 7 7,351 discussions
Networking & Wireless 14,641 discussions

Smart Home Help

Light bulbs you shouldn't buy

There are plenty of dimmable LED light bulbs, but make sure you don't buy the ones that flicker when you dial them down.