Hi, i have a Maxtor HD (6E030L0), and i recently install on it windows 98 (before i had windows XP), and when i was creating a partition for windows 98 and one for my data, all this using a win98 bootdisk and fdisk, it appeared on screen that my HD full capacity was of only 8GB, but i know that my hardrive has a capacity of 30GB. I was doing some research and i found that te problem could be that the bios version of my mainboard was to old, but it has the latest version (my mainboard is a MSI model: MS-6738). Besides, when i had winXP it show a 27GB harddrive, so maybe the bios is not the problem but that you should know it.
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Welcome to the wonderful world of windows disk size limitations.
What you are running into is the Windows 137GB Capacity Barrier AKA the 48-bit Logical Block Addressing Support for ATA (IDE), Serial ATA or ATAPI disc drives.
In English this means windows will only “acknowledge” between 127 and 137 Gig of a disk drive without some updates.
In most cases after he latest Service Packs are installed, any additional gigabytes will show up as unallocated space on the drive and you can create a second partition with the Windows disk management tools.Unfortunately this will mean that you have 2 partitions on the drive (if you placed your os on the drive or partitioned it before the updates were installed.).
If this is a secondary drive (in other words your OS is on a different disk drive), install all of the system updates first, you should then be able to format the entire drive as one partition.
The way I solved my problem was to make sure when I restored Windows to the default settings that I did it up to the same support packs and hot fixes then when backing up the system with the Maxtor HD. It took me many days to figure this out... was written it the Maxtor HD documentation and it works fine.
To fix/restore to full capacity, you may need to delete the existing partition and re-partition then reformat again.
Most old computers have limitations on the CMOS/BIOS as to how big the capacity of the HD that it can recognize. Windows however would recognize big HD size and therefore can partition, format and check.
Alternately, a third party disk utility program may be used such as Partition Magic.
Hope this be of some use/help. Post back how things turned up or should you need additional information.