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<p>Folks,</p>
<p>There will be a need for an interruption of our cache disk use to
bring on new Lustre disk space (about a petabyte for all of
Physics) and to upgrade Lustre software on the old system. All of
the files already backed up to tape will disappear from cache; to
access them they will have to be re-fetched from the tape library.
Also new farm jobs will not start if they will run over the
transition.</p>
<p>The proposed date is Wednesday, July 24th. The computer center
has asked for feedback on the schedule. Let me know if you know of
reasons why this is <b>not</b> a good time for the outage. </p>
<p> -- Mark</p>
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