Please help... The error message below has only recently started appearing. Before I would get a rather standard error message that Lightroom has an unexpected error and needs to quit. I tried deleting the previews.lrdata in catalogs and that helped for a few minutes.
I removed the preferences folder. Didn't do anything.
I uninstalled and reinstalled. That did nothing.
Please help. I can't do a thing in Lightroom.
Disk I/O error usually means your disk is going bad.
PS - If you haven't tried moving your catalog (the whole folder it's in) to a different disk, then you haven't tried everything .