Since ripping into my 942 a while back that ultimately led me to replace a blown 7812 regulator that was causing my fan to run all the time and my remote to act flakey I thought I'd try my luck at getting a back up hard drive. I figured that since the hard drive seems to run 24x7 it is going to fail sometime. The original drive was a Western Digital SATA drive. I ended up finding a Maxtor 7y250m0 online for $60. Simply pulled out the old drive and put in the Maxtor drive. The 942 booted and gave a hard drive corruption warning asking to reformat the drive. Hit "ok" and the 942 reformatted the drive and came up like new. Tested out just fine. I put the old drive back in and it rebooted fine with no loss of recordings. Keeping the Maxtor drive as a spare. One nice thing too is that this Maxtor drive is also listed as an approved drive for the 622. If I ever upgrade to the 622, I'll have a spare for it too.