HP just released the support for allowing Mac OS X computers to back up to the older models of HP MediaSmart Windows Home Servers. I installed this, so I can back up our Mac mini to our server. I have been using an external USB drive, but this would enable me to stop using that drive as a backup for the Mac mini, but instead, I can use that drive as a removable backup drive for the server itself.
The setup on the server was very straight forward. All I had to do was create a share named "Mac", and I didn't have to give any user write permissions to it.
Then on the Mac, I installed the HP MediaSmart software. After a reboot, when I launched the software, it asked for the server name and adminstrator passowrd. Once those were configured, I clicked on the Backup tab. This is where I had some problems.
The software suggests a size for a backup partition that is about the same size as the boot drive on the Mac. The Mac software creates a disk image in the "Mac" share, with a name containing the serial number of the Mac that is running the software. This allows multiple computers to be backed up to the same server. When I tried to create this backup partition it kept failing that there wasn't enough space, even though there was plenty on the server. I could get it to work, if I specified a very small partition size. But when when I specified a size that would be big enough to backup the whole mac, it would fail with the same error.
I found that I was able to get this to work by turning off Folder Duplication. Once I did that the disk image was able to be created. Then I was able to enable Folder Duplication. I have been able to backup the Mac mini to the server with no problem.