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I did the following:

dd if=some.iso of=/dev/sda

Or some such craziness. How should I recover from this? Gparted, etc..., didn't help out, deleting partition etc... Whenever I try to install a linux onto this disc it complains that its an iso9660 cd.

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up vote 2 down vote accepted

Zero out at least the first track of sectors, and you should be okay.

dd if=/dev/zero of=/dev/sda count=63

Seagate and WD have CDs of utilities that can also do this. This will force the writing of a clean Master Boot Record, MBR, by the next installer you use. Some full-disk recovery programs work best by zeroing out the beginning of the disk before performing the installation.

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Thank you! That did it! – ftravers Nov 13 '11 at 11:49

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