Save changes, will update or in the case of a newly prepped disk write the RDB to the Hardisk, apart from partition info being stored here it also stores whether the Partition is Bootable or not & the Boot priority.
make sure you only set 1 partition as Bootable.
Therefore you NEED to save changes to the HD, once Partitioned & you are happy with it.
Glad putting the csascsi.device on the floppy solved the HDToolbox issue.
Sounds like job done to me.