It is almost as if the I/O operations are somehow much slower. I noticed that at first there might not be too much of a difference (still slower though); However, very quickly things slow down dramatically. The same extraction takes at least 5x longer. The same 2D classification that used to run very fast (30m), now takes over 3 hours.
I checked the file system, everything is working fine. I checked the GPUs, all is okay.