I'm running a machine with md raid (two sata drives in a mirror).
Every once a week, the machine just stalls, and on-screen messages like
"sense key medium error" show up (it has happened two times now). I
reboot, and the machine works just fine, the md system is resyncing the
drives and there seem to be no further errors.
Is it the drive? Some other hardware problem? Or more importantly,
which log files can I examine to find out? I tried the usual syslog,
messages, etc, but they are no more generous than telling me the raid
array is broken and is being resynced.
Can i review the onscreen messages that scrolled when the machine
stalled? I think it looked pretty much the same as the one time I
happened to unplug a SATA drive while the machine was running.
(And also, the box is not stalling completely, it responds to pings,
will show the MOTD when i log in over SSH, but won't show me a prompt).
Sorry if I'm not giving enough details but I'm unsure on where to look.