I am running Shibby's Tomato on an Asus RT-N16 and occasionally the usb drive (solid state sata => usb) will enter a bad state where it needs to be unplugged and reconnected before it can be accessed again without an I/O Error. The system log sees spurts of the following when this occurs, usually 30 messages at once: Jul 10 20:59:58 user.err kernel: sd 0:0:0:0: rejecting I/O to offline device Everything seems fine after reconnecting the drive. This pops up every few months but I have not been able to track down a problem. Does anyone have any idea what might be wrong? Thanks!