That's why the SMART warning is coming up.. And although it worked after reseating the cabling, there are probably only two probabilities.. Either the reseating the cabling has fixed the problem (because it wasn't plugged in correctly), OR...the slave will continue to fail till it dies completely..
Be sure to make backups NOW.
Hope this helps.
When I booted up my computer, it wouldn?t boot quite all the way and when I tried again the following message came up: ?Reboot and select proper Boot device or insert Boot Media in selected Boot device.? After trying several ?F? keys and even the original OS CD, I finally received this message: ?Pri Slave Hard Disk: S.M.A.R.T. Command Failed.? This then gave me a clue so I opened up the computer case and removed the cable and power source to the slave drive and then pushed the on button and it booted up fine. Then I turned things off and reconnected the cable and power source to the slave drive and everything worked just fine. Though this is a six year old computer the master hard drive is only a couple of months old with the original version of XPSP3 installed. I have also installed a USB ?Card? in a vacant PCI slot. It is my understanding that the S.M.A.R.T. Command is connected to the BIOS but I have not found anything in the BIOS that refers to it. If this happens only occasionally, I guess I can live with opening the case and disconnecting things and then reconnecting them. But I am hoping that someone knows how this problem can be fixed.