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# Wave_serverV recovery need

- To: earthw-list@nmt.edu
- Subject: Wave_serverV recovery need
- From: kohler@usgs.gov
- Date: Wed, 26 Jul 2000 12:08:46 -0700

    To:  Earthworm Community,

    I have a suggestion for a modification to wave_serverV which I think would
    benefit the Earthworm community.

    Currently, if a hard drive containing waveserver tank files develops a bad
    sector or sectors, and wave_serverV attempts to read the bad sector, the
    wave_serverV process will exit.  Even though the bad sector may lie in only
    one tank file, none of channels served by the wave_serverV process will
    continue being served after this time.  It would be preferable if, instead
    of exiting, wave_serverV quit serving data from the channel with the bad
    tank file and continued to serve the rest of its channels.  The program
    should also send out a pager and/or email message notifying someone of the
    problem.

    The reason this is important is that when wave_serverV decides to exit,
    there may be no one available to fix the problem, and a lot of data could
    be lost.  Currently, when a wave_server process dies in Menlo Park, it's a
    pageing offense, which means that someone may be awakened at night or the
    weekend (undesirable).  And, several times I have had to visit the office
    myself on a weekend to repair or replace a bad disk drive.  If only one
    channel were being lost, instead of all channels on a waveserver process, I
    wouldn't send out pages.  I would just fix the problem on Monday morning.

    Does anyone else think this is a problem?  Is anyone willing to modify the
    code?

    Thanks, Will

    ----- End Included Message -----

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