Unable to boot from the installation disc

I am trying to run repair on my imac 10.6 disk utility snow leopard.  I have no problem with the Superdrive drive.  The installation disc is fine.  I inserted the disc in the drive.  When it mounted on my desktop I stopped.  I pressed the c key and pressing the Start button.  The Apple logo appeared with the spinning wheel.  After two or three minuets logo Apple disappeared and replaced a circle with slash.  I had to pull the plug at this point here.

Try instead boot into recovery mode.

On OS X Recovery - Apple Support

Tags: Mac

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