I have six Macs in my house, all running the latest, greatest version of Snow Leopard. I also have an eMac (PPC) running Leopard 10.5.8. I use the eMac as a file and print server. The eMac has two external FireWire drives, 1 TB each. I partitioned each one so that there is a separate partition for each. I've shared each of the partitions.
On each of the six Snow Leopard Macs, I set up Time Machine to use the individual shared volume from the eMac. This seems to work fine, but when several clients try to back up at the same time I get the following error:
The backup was not performed because an error occurred while copying files to the backup disk. The problem may be temporary. Try again later to back up. If the problem persists, use Disk Utility to repair your backup disk.
What can I do to troubleshoot this further and make the system more reliable?