media files are on HDD.
Renaming needs some time, but not that much. I just renamed 50 files, and it took 2 seconds at most.
How is your HDD connected? Do you have a fast connection? FireWire, Thunderbolt, USB3? Or a slower connection?
How full is your HDD? Can it be, that you are running out of disk space?
The HDD is in the computer (esata). Hard drive is < 30% full. Has occurred on different drives in different configurations.
This has been one constant of Aperture, though it sometimes is faster than it is other times. Occasionally, this will be quite a bit faster, but it's been occurring since we started using Aperture (in 2007).
Libraries are repaired regularly and copied to reformatted drives fairly regularly.
Hallerphoto, is the disk formatted as Mac OS Extended (Journaled)? I agree, 5 minutes seems really long for 250 files. Have you tried running Verify Disk Permissions and Verify Disk (via Disk Utility) on that drive (and any other connected drives)? If either verify pass reports problems run the corresponding Repair Disk Permissions or Repair Disk operation, and repeat until no more errors are found.
It's a good idea to backup your important data to another drive before running the Repair operations just to be safe.
If either verify pass reports problems run the corresponding Repair Disk Permissions or Repair Disk operation, and repeat until no more errors are found.
"Repair Disk" - that is a good idea, if you suspect a broken file system, but not "Repair Permissions" - I'd always prefer Aperture's built-in "Repair Permissions" to Disk Utilities's Permission repair. Disk Utility simply does not know the permissions required for an Aperture Library. The Aperture Library First Aid Tools have been specifically designed to deal with the database.
Is there _anything_ else in your set-up that could be adding to the time it takes to write the names to disk? Disk-mirroring? Back-ups? Some kind of indexing (Launchbar, etc.)?
I rename tens of thousands of files, and while it is not instantaneous, I don't have to wait five minutes for a thousand files or more.
You might try something outside Aperture, such as the excellent NameMangler, just to see if batch renaming several hundred files is slow there. NameMangler was recently upgraded. It works astoundingly fast.
If you can't resolve this, you might be able to work around it by importing all files into a Finder folder, arranging by date, and then importing into Aperture and renaming on import. (I'm not positive this will work -- and I'm sorry, but I can't check it right now.)