I have a datastore set up in ESXi where I put all my ISOs. Somehow, something broke (I don't know what) and now I can't upload files to that (or any other) datastore. For large, ISO-sized files, the "Uploading..." dialog pops up, hangs for a while, and then the "I/O Error Occurred" displays. For smaller files (10 meg neighborhood), the "Uploading..." dialog comes up, a progress bar starts going, and it estimates a time remaining. Then it hangs at 1 second remaining for a while, and the same "I/O Error Occurred" comes up.
Has anyone seen a problem like this?