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<== Date ==> <== Thread ==>
Subject: XSPRESS3 hdf5 problems
From: John Dobbins via Tech-talk <[email protected]>
To: "[email protected]" <[email protected]>
Date: Thu, 23 Jan 2020 14:15:21 +0000
All,

I have a new 5 channel Quantum Xspress3 data readout unit which when taking multiple frames will start generating hdf5 related error messages at what seems like random (will acquire between a few or thousands of frames before generating errors).  Once these messages start they seem to continue until the IOC segfaults. 

repeating pair of error messages on the IOC console:

 HDF5-DIAG: Error detected in HDF5 (1.8.12) thread 0:
  #000: ../../src/H5Dio.c line 231 in H5Dwrite(): can't prepare for writing data
    major: Dataset
    minor: Write failed
  #001: ../../src/H5Dio.c line 348 in H5D__pre_write(): file selection+offset not within extent
    major: Dataspace
    minor: Out of range

This IOC is a binary that comes with the detector. 

I have contacted Quantum.  I thought that while waiting to hear from them it would make sense to build an IOC from source. On github I see

epics-modules/xspress3

and

quantumdetectors/xspress3-epics  forked from the above.

Any advice on which i should go with? Any suspicions regarding the hdf5 errors?

Thanks,

John Dobbins

Research Support Specialist
Cornell High Energy Synchrotron Source
Cornell University

www.chess.cornell.edu
Replies:
RE: XSPRESS3 hdf5 problems Mark Rivers via Tech-talk
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