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Invalid disk geometry or the likes?

 
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trink



Joined: 03 Oct 2010
Posts: 1
Location: /dev/null
PostPosted: Sun Oct 03, 2010 10:19 pm    Post subject: Invalid disk geometry or the likes? Reply with quote
So yeah, I have a hard drive that is 750 GB, and it's being read as a 2 TB.
Testdisk shows it having 267349 cylinders when it should only have 91201, and changing the geometry in testdisk is only session based.
I tried using
Code:
dd if=/dev/zero of=/dev/sdb bs=16k conv=notrunc

and I tried the same with dcfldd, to no avail.
I've tried writing an msdos partition table to it using fdisk, and many other things.
Any time I try to use mkfs in parted after creating a partition table, it tells me that there's an unrecognized disk label, so then I create one inside of the same parted session and try again, and it still says it's an unrecognized disk label.
So, as it stands, dd, dcfldd, testdisk, photorec, parted, gparted, and fdisk are all failing.
As far as I know there's no way to truly change the geometry of the disk, just change how the disk is read by feeding a program different geometry.
Any ideas as to what I might be able to do next?
I'm not looking to send it in anywhere, I'd prefer to do it myself.

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chipdip
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PostPosted: Sat Nov 27, 2010 1:38 pm    Post subject: Reply with quote
Disk geometry is stored in a ‘special’ firmware section on the disk. It takes specialized software to fix this. There used to be a free utility for that on hddguru. I just took a quick look and did not see it. If I find a link to it I will post it for you.

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