MacDevCenter on Getting Ready for Tiger

To me, D Jone's remarks suggesting to not partitioning your boot volume is completely false. I've been partitioning Mac internal boot drives for myself and hundreds of clients since System 7 with a smaller "Emergency" or "911" partition that has a very basic, bare-bones backup system with disk repair utilities (no additional applications really needed). I have NEVER had any problems running the main system from a partitioned drive. This setup, especially with portables on the road when you don't have a system CD-ROM or a backup drive with a system on it, is nothing but an asset. If anything happens to your main system, you boot off the secondary partition, use Apple's Disc Utility to "Repair Disk" and "Repair Disk Permissions" on your main drive, reboot from your main drive, and save yourself the hassle of finding your original CD-ROM or fumbling with an external drive. -my 2 cents

To me, D Jone's remarks suggesting to not partitioning your boot volume is completely false. I've been partitioning Mac internal boot drives for myself and hundreds of clients since System 7 with a smaller "Emergency" or "911" partition that has a very basic, bare-bones backup system with disk repair utilities (no additional applications really needed). I have NEVER had any problems running the main system from a partitioned drive. This setup, especially with portables on the road when you don't have a system CD-ROM or a backup drive with a system on it, is nothing but an asset. If anything happens to your main system, you boot off the secondary partition, use Apple's Disc Utility to "Repair Disk" and "Repair Disk Permissions" on your main drive, reboot from your main drive, and save yourself the hassle of finding your original CD-ROM or fumbling with an external drive. -my 2 cents

#1, And what is your rationale for this belief?

Partitioning your boot volume is a bad idea, and makes me tend to shy away from any of the rest of his philosophy on OS preparation and maintenance. If you want a dual boot system, just boot from an external drive. The harddrive that your OS is on should never be partitioned into separate virtual drives. Do this to your data drives all you want, but not the drive that the system is installed to.