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On 7/9/2011 5:43 PM, Axel Kellermann wrote:
> To skip one ore more partitions during OS probing, the user has to add
> the variable GRUB_SKIP_PARTITIONS to the grub config file
> (/etc/default/grub) and provide it with a space delimited list of
> partition names (e.g. GRUB_SKIP_PARTITIONS="sda2 sdb3").

Partition numbers tend to get moved around quite frequently, so this 
would be a fragile configuration, and require manual entry.  It would be 
better to automatically notice that the partition is a Win7 system 
partition, and ignore it.  If you must explicitly exclude manually 
chosen partitions, they should be specified by UUID.