Comment 4 for bug 757201

cjwatson, thanks so much for taking a look at this.

I hear your concern about changing whether irrelevant partitions are placed in the hybrid MBR. Note however that the only partition numbering that would change would be in the MBR. In a GPT + hybrid-MBR configuration, linux takes its partition numbers exclusively from the GPT, so linux device numbers won't change at all. Are you aware of any utilities or OSes that care particularly about the index of partitions within a hybrid-MBR?

If there are tools that care, another possibility is to simply zero out the entries corresponding to irrelevant partitions. They'll then be ignored, but the index of other partitons will remain the same.