I got a weird problem. Connecting an NTFS HDD to the Mac, doesn't do anything. Upon investigation, I saw that it wasn't mounted in Disk Utility and mounting it manually would throw the error to check the disk. But I can mount the volume by running sudo mount -t ntfs -o rdonly, /dev/disk1s3 /Volumes/newvol. I'm running 10.10.2. BTW, the drive works fine on the other computers running the same OS. I am to using any third party filesystem drivers.