Making an External Hard drive bootable was all the rage... Then came the flash drive.
These procedures require you to open your external hard drive enclosure to make the drive inside bootable. This will void your warranty if it is still in effect.*
Making an External Hard drive bootable:
First: is this a SATA or USB connected drive. USB read on, SATA go to the page: Partitioning and Formatting a hard drive or SSD for partition and formatting a hard drive.
Disconnect power adapter and USB cable. You will need to have the following items available before continuing:
If this is a 2.5 drive you will need a IDE adapter that will reduce the size of the pin connectors from the normal 80 Pin IDE cable to the 3.5/2.5 80 Pin cable. Your local electronics store may have them or you can find them on at most online computer stores.
You can use either a desktop or a laptop computer. If you use a laptop computer the drive has to be the same size as the one in the computer, do not try to insert a 2.5 drive connector into a 3.5 inch drive connector, you will damage the connector pins!
If you do have a different size drive in the laptop vs. the external drive then your only choice is to use a desktop.
This may seem like a lot of work but the only way you can partition and format the drive is through the IDE or SATA interface and not the USB connector interface.
Open the drive enclosure, remove the drive from the enclosure and install it in your desktop or laptop.
Next go to this page: Partition and format a hard drive for making an external hard drive bootable
When the drive is bootable and you have the files you need on the drive then reverse the removal procedure to put the drive back into the enclosure.
Why Making an External Hard drive bootable is very useful.
For DOS bootable drives you can load a program that will "mount" a Windows NTFS volume, this however is not a NTFS file system, it allows DOS to see the Windows NTFS (New Technology File System) volume or "drive".
Using a Linux file system on a Vista, Windows 7 or 8 volume has a tenancy to corrupt the drive. If you are copying files I strongly suggest you use an ERD (from the installed OS) to do that type of maintenance. (for more information on Operating Systems see the Operating Systems Chapter in the Self Computer Repair Unleashed! 2nd Edition Manual)
You can use a bootable drive to do maintenance on the installed Operating System, some registry editors will open registries from a non-operational computer.
You can also run anti virus programs to clean out a virus.
If you install third party programs such as a defragment program you can defrag the installed Operating System partition/drive with out missing any files that would otherwise be locked and not movable. This type of defrag will do a better job of combining the files that otherwise would be skipped because they would be in use.
It is important that you test you work, one to insure the drive will function and that it will start the computer, to do this with a normal desktop you can either disconnect the power or interface cable or disable the boot drive in the BIOS settings.
With a laptop (and some desktops) you can test your external drive either by selecting it at boot up (when the laptop boots you have a keystroke that will get into the boot device menu) or leaving the internal hard drive out when you complete the procedure.
*As I pointed out at the top of this article you may void your warranty if you remove the drive from the enclosure. I do not take any responsibility for any of these instructions use at your own risk.Down load this Free Computer Repair Eight Part Checklist save it to your hard drive, print it out when you do your repair. Send your friends here for their copy!
Once you have made your bootable external hard drive you will want to add some tools to the drive to make troubleshooting and repairs easier and faster here is a list that I suggest you have on your drive: Your IT Tool Box