[ubuntu] mysterious hard drive failures

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http://ubuntuforums.org – hey all, I've been having some weird hard drive failures on my mythtv/torrent computer, running a normal 9.10 ubuntu install. Hopefully someone here can tell me what's going on with this thing. The error seems to occur after the thing has been on for at least 1-2 days. The most recent occurrence didn't do any damage and was fixed by a reboot (and turning off the power supply for a moment), but other times I've had to run fsck to restore the data. This is the syslog from the point where it goes wrong. Code: Mar 25 20:28:00 mythbox kernel: [143896.968589] ata1: lost interru (Hardware)