My bois cann't see more than 10GB Harddisks

My bois cann't see more than 10GB Harddisks. What are your suggestions?
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if your BIOS wont see disks as large as you want to install, you will have to use a DDO (disk drive overlay) program supplied by the disk manufacturer.  the only other option is to flash the BIOS.  The only problem with the BIOS flash is that it can cause other problems and depending on the age of this motherboard, might not fix the one ata hand.

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issamwdAuthor Commented:
but please what is a DDO exactly,
Besides, I don't have it.
How can i flash the bios.
andwhat is meant by flashing the bios.

Disk geometry is the group of parameters which define disk structure: amount of cylinders, sectors and heads.

Normally, BIOS autodetect those parameters to know how to deal with the disk. If BIOS can not configure it automatically, you can try by writing them manually. In this case, read disk label and note these values (cyl, sec, heads) to write them in Standard section of BIOS setup.

If, although these efforts, BIOS is unable to deal with disk, then you need a Disk Manager (the correct name for the aforementioned DDO), which transforms disk geometry into a more manageable form; en example: if actual heads of disk are 8, DM perhaps changes it to 16, or 32, and changes other values accordingly.

But once DM was installed, it can't be removed; if so, disk will become unreadable. This was mandatory in old machines, where BIOS could not handle disks with more than 512 Mb of capacity; in this case, a DM was the solution.

Flash BIOS: is a BIOS capable of being written, this is, modified. BIOS manufacturers use this technique in order BIOS code can be updated without needing to buy a newer BIOS chip. This feature is relatively new (it's on the markets since no more than a few years).

To flash your BIOS, you need:
a) To assure your BIOS is a flashable one. If not, forget it; you have no way to upgrade your BIOS program.
b) To have the flashing program. As a rule, if you visit BIOS manufacturer's site, you'll find there a special program to do the flash and the latest version.

But WATCH OUT !!!!, flashing a BIOS it's a VERY SENSIBLE PROCESS !!!, and a bad step can convert your machine into a piece of crap metal.
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