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I had tried to install Ubuntu 10.10 near a Windows7 in a 64 system. The installation was suppose to be 512Gb left for Win and 512Gb for Ubuntu. The installation hanged and on restart windows sees only his 512 partition. When I try again to install Ubuntu I only see the windows partition.

How can I recover the lost partition and install Ubuntu there?

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Try installing this software 'PARAGON PARTITION SERVER' and scan this hdd and see if it sees the other partition, if that 512gb partition is seen format it in NFTS format

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thanks. I was doing the same with another one. Mini tool partition recovery. If this fails I'll try yours. – Elzo Valugi Apr 7 '11 at 17:26
You can use the Disk utility on the LiveCD as well. – Lekensteyn Apr 7 '11 at 17:40
Ok but don't worry one way or the other you will get the partition back. When reinstalling usb try a live usb as it is faster and safer than a live CD – Mysterio Apr 7 '11 at 17:41
it did worked with the disk utility from the cd. – Elzo Valugi Apr 10 '11 at 19:04

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