Spotlight will not index external drive — but definitely not the "usual" simple issue
I have a OWC two-disk external firewire enclosure/hub that refuses to allow spotlight indexing.
I'm aware of and have tried to usual approaches to resolving this, ranging from the advice to turn spotlight indexing off/on via the Mac OS Preferences, to reformatting the drive, switching to different RAID/spanning modes for the drive, trying some recommended terminal tricks, looking for and deleting the folder that spotlight creates on the drive, and so forth.
Nothing resolves it. Otherwise the drive works fine, though things are obviously slower since finding files takes forever without Spotlight working. (Kind of defeats the whole purpose of the expensive Firewire enclosure, but I digress...)
I'm at a loss. Feel free to share the usual solutions, but don't be upset if I simply report that I did them already. Perhaps among the responses there will be something new that gets at the potential and apparently unusual source of the problem? (Other drives attached to this computer do not exhibit this issue.)