Hard Drive Unknown Size Issue!

No Boot Device Available - What Does This Mean?Simply put: "No Bootable Device Available" means your computer can't find your hard drive. Aka: Hard Disk or HDD. The hard drive is where data is stored on your computer (files, programs, photos, everything), this includes Windows or whatever operating system you have installed.
Since your computer "can't find" your hard drive (HDD)... it can not boot (start) Windows or other OS...and you are stuck.
Troubleshooting Steps:First, let's see if your computer has any link left to the hard drive. You've already tried pushing F1 (if you are on a Dell), and recieved an "Internal HDD Error".
So, step 1: Press F2 (or whatever the computer suggests) to enter BIOS setup. If F2 doesn't work try the "del", or F10 key. The "esc" key works on some brands, too.
BIOS has different versions, but there should be something labled "Primary Hard Drive" - if it says "none" ... then your computer doesn't even recognize that a Hard Drive is connected. Let's hope my solution works for you.
If under "Primary Hard Drive" it lists any info (name, size, etc)...then skip down to this section for your next step (actually, even if the HDD is showing up in BIOS, you could try my easy fix below...but it is less likely to work.
If under "Primary Hard Drive" it says "none", it could just be a loose connection keep reading:
How I fixed my No Bootable Devices Error on my Dell Laptop:I removed the Hard Drive, then pushed it back in...nice and tight. And TA DA!
All Fixed. Crazy, eh?
If your computer can't find the HDD at all, the problem came without warning, and you are on a Laptop (Dell and HP are known for this)... this would be my first suggestion to try fixing your error.
Opening a computer can void your warranty, but if you are like me: my computers always break after the warranty has expired anyway -- it doesn't matter :P
You must: Unplug the power cable, and remove the battery first before removing the Hard Drive. Remove any thing else plugged into the computer: mouse, USB drives, etc.
Also, you'll want to ground yourself by touching a un-painted metal object (I use a wrench) to ground myself before touching the insides of a computer.
After removing the battery, you should see if you computer model has a way to ground the MotherBoard. On my Dell 610 -- you simply hold the power button down for a 5 seconds after disconnecting the battery to ground the MotherBoard. All Dell laptops work this way, I think.
This guide has photos and steps to disassemble a Dell 610 Laptop (thanks to the author for helping me fix my computer!) -- but my guess is that any Dell Laptop would have similar instructions.
If you have a different computer brand or model simply do a Google search for "disassemble brand /model" -- replacing "brand / model" with your own computers name. For instance if you have a HP Pavillion G6, your search term would be "disassemble HP Pavillion G6". Go through the results and try to find a nice step-by-step guide with photos. Check out my resources below for quick links to common Laptop Disassembly guides.
Remember: you don't have to take apart your whole computer. Just find out how to remove the battery and the hard drive. Be sure to read warnings and suggestions if the guide mentions any.
I don't know if this would work on Desktop computers -- but it may be worth a try.
Why Does Removing and Putting-Back a Hard Drive Fix this Error?Sometimes, the connection to the HDD gets loose -- removing it and putting it back in (push it into the slot firmly to make sure) can fix this issue instantly. Dell laptops seem to be especially associated with this issue.
I also think perhaps removing and re-installing (physically, not software-wise) the hard drive resets things back to normal. Kind of like how if your computer is acting weird, the first step is generally to turn it off and on again.
GeeksToGo.com might be able to guide you through further troubleshooting in BIOS.

from disk management Initialize it, format it, your done.

Download a free copy of either Hiren's BootCD or Kasperski Rescue Disk, using a different computer. Then boot to the OS on that home made disc. You should be able to browse to your files and save them to another drive, such as a flash drive or a USB connected hard drive.

The BIOS determines the maximum size hard disk the computer can support.
The max hard disk size for this model Dell is 80Gb.
To use your 250Gb hard drive, install this Hard drive into an USB hard drive case and use it as an external USB hard drive.

Replacing the hard drive is not too difficult. You will need the operating system disc to reinstall windows or you could try a free Linux (like Ubuntu) operating system.
On the bottom of the laptop there is a 2 access panels the small one is the memory and the larger is the hard drive. You just need to remove the screw and and the hard drive will be below. You just need to see what type it is by the connection. There are 2 types IDE or SATA; Ide had a wide ribbon connector and SATA has a small connector. The old hard drive will also have the type stamped on the label. You should go will a larger capacity than what was in there. For example if you have a 250GB you can add a larger 750GB or more. Make sure the power is off and remove the battery before starting the process.
If you just need more storage and the old hard drive is still working you could just buy an external usb hard drive and keep all your pictures and music on that.
Thanks for using FixYa

I would unplug the external drive then shut down your computer. Plug the drive in(be sure the USB port is in good working order.)Turn the computer on. If it does not recognize the drive search online for tech support for that particular drive. Install any drivers or software. Be sure to find out if the drive is compatible with your operating software. Make sure all connectors are seating firmly and correctly. Make sure that everything is plugged in where it should be plugged in.

Enter your BIOS setup and check what the BIOS sees for hard-drive. It may not be assessing the drive size correctly so you may have to force it by manually entering the data it needs to see the drive.

If you mean by drive the hard drive, any 2.5" laptop hard drive will work. It must be ATA for this model. www.newegg.com is the best place to find computer parts for a good price. I just purchased a seagate 120gb laptop hard drive for this same model computer.

Char S.

You should be able to open up your external hard drive enclosure, find the right size fan, and order another one from almost any online store for cheap. You may even be able to go to some computer store nearby you and you may be able to get one there.

use a data recovery software ! u'll most probably be able to recup. u're files (most of them)(it will take a LOT of time) and even fix the drive problems (logical or fizical )