Removing a BIOS-enforced DCO partition

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TempestSong
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Removing a BIOS-enforced DCO partition

Post by TempestSong »

Hey guys, first post here. :P Been a long-time lurker, thought it'd finally be time for me to join everyone else. Unfortunately, it's not on a light note...

One year ago when I first bought my computer, I decided to install a program my motherboard manufacturer (GIGABYTE) provided, which allowed me to image my operating system into a special partition on the hard drive. Not too long after, I decided to stop using it, thinking buying Ghost would be a better option. Now, when I tried to search for the partition where XpressRecovery2 (the program) installed itself, I couldn't find anything. Windows reported the hard drive as having a much lower capacity than it should have!

Doing some further research (and attempting to create a partition in the free space using a LiveCD), I found out that the missing space was related to a DCO lockout. Did a test using hdparm on the LiveCD to see if it was an HPA that was causing it, but hdparm gave me a negative on that (process of elimination is what led me to the DCO conclusion). I then downloaded a tool called HDD Capacity Restore, and it reported missing space on the drive; however, when I attempted to use it to restore the space, it stated that it encountered an error. SpinRite came right after this, and it gave me a shocking (not really...) report: the BIOS itself may be enforcing the DCO, as it could not read the entire sector span of the partition.

I am, well, disappointed...at GIGABYTE. :banghead: Why they would use this method to install their imaging software is strange, but meh. Interestingly enough, when I tried to format the partition as FAT32 under Windows, it reported 137K (!) bad sectors on the partition, which I know for sure isn't bad because I haven't had a single bad sector occur on the drive yet.

Anyone have any thoughts? It seems I'm at a wall.
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DesertFly
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Re: Removing a BIOS-enforced DCO partition

Post by DesertFly »

Backup, do an fdisk and a complete reinstall from disc?

I'm sure people with more expertise will come along with better ideas, but that's what I got now.
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TempestSong
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Re: Removing a BIOS-enforced DCO partition

Post by TempestSong »

Linux's fdisk won't work due to the aforementioned bad-sector issue, and Windows wouldn't even see that section anyway. Just recently attempted flashing the BIOS to a newer version to see if that would reset anything; no go.

Oh well, I've more or less given up on trying to reclaim the space. It's 133MB worth, but still...133MB...
You could put so many Maya files there. :( Damn you GIGABYTE!
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Stark
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Re: Removing a BIOS-enforced DCO partition

Post by Stark »

How much is 'much lower'? Are we talking about a sizable percentage of the drive, or just a few hundred meg?
TempestSong
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Re: Removing a BIOS-enforced DCO partition

Post by TempestSong »

Just a few hundred megs, but as I said, I like having all my space available. :P

I guess "much lower" was an exaggeration of sorts, but these days I literally use all the hard drive space I can muster.
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