[mythtv-users] slightly OT: NFS causes hard lockups

[matthew.garman at gmail.com]

I just added several disks to the homebuilt server in my basement.
I plan to use it as a huge data store for video on demand.

In it, I have a software RAID5 array (created using Linux mdadm).

I've had the machine lock-up hard several times recently (locked up
to the point where it can't be pinged and keyboard is completely
unresponsive [even caps lock]).

I believe the problem is NFS. I've run extensive stress testing
using the program found here[1] as well as the program "stress". I
actually ran the two programs simultaneously for hours without
incident.

Whenever I throw NFS into the mix, the machine locks up in a matter
of minutes.  Basically, my RAID array is exposed via NFS.  Any kind
of significant transfer over this mount seems to cause a hard lockup
for the server.  "Significant transfer" includes ripping a DVD and
running "stress" on a client machine.

There's nothing worse than hard lockups like this! Anyone have any
suggestions or ideas?

Thank you!
Matt

[1] http://people.redhat.com/dledford/memtest.html

-- 
Matt Garman
email at: http://raw-sewage.net/index.php?file=email