On RedHat 6.1 Installer occures the following Problem:

While partitioning the harddrives, the installer/partitioner write
one partition to primary and all others partitions to extended partition.

The Problem is: The biggest partition (like /usr or /opt) is every time
at the primary partition.
(eg: /dev/hda1)
Smaller partitions (like /) will be moved to the extended partitions
(/dev/hda5)

On an alpha-system is the bootloader Milo, Milo can NOT work with extended
partitions. The root-filesystem must be on an primary partition.
(eg /dev/hda1)

But the root-filesystem have only 150 to 300 MB.

If I want to write partitiontables, I have no chance, to put the
root-filesystem to /dev/hda1 because all bigger partitions want to have
this partition!
So there is /usr or /opt or any other big filesystems every time
on the only primary partition.