If you installed the latest version of Drobo Dashboard (currently v1.6.1) on Snow Leopard, and you're also unfortunate enough to have a Intel Mac that doesn't support 64-bit, then you might notice a drop in performance of your Drobo, and possibly your system altogether.
Check your Console logs. If you see something like this...
com.apple.launchd[1] (com.datarobotics.ddservice64d[325]) posix_spawn("...."): Bad CPU type in executable
com.apple.launchd[1] (com.datarobotics.ddservice64d[325]) Exited with exit code: 1
com.apple.launchd[1] (com.datarobotics.ddservice64d) Throttling respawn...The following commands are taken from the official Drobo uninstall script found here:
/Library/Application Support/Data Robotics/Drobo Dashboard/Drobo_Dashboard_uninstall.sh
I cut out the code that uninstalled the 64-bit support, and executed those commands directly in a Terminal window. (Each command is shown on its own line.)
*** WARNING: Make sure that you have stopped the Drobo Dashboard and unmounted your Drobo prior to executing these commands!
sudo killall -9 ddserviced sudo launchctl unload /Library/LaunchDaemons/com.datarobotics.ddservice64d.plist sudo rm -rfv /Library/LaunchDaemons/com.datarobotics.ddservice64d.plist sudo rm -rfv "/Library/Application Support/Data Robotics/Drobo Dashboard/DDService64d" sudo kextunload -v /System/Library/Extensions/DRI_iSCSI_Initiator64.kext sudo rm -rfv /System/Library/Extensions/DRI_iSCSI_Initiator64.kext sudo kextunload -v /System/Library/Extensions/TrustedDataSCSIDriver64.kext sudo rm -rfv /System/Library/Extensions/TrustedDataSCSIDriver64.kext
Mac OS X Hints
http://hints.macworld.com/article.php?story=20091106182154177