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Conference turris::digital_unix

Title:DIGITAL UNIX(FORMERLY KNOWN AS DEC OSF/1)
Notice:Welcome to the Digital UNIX Conference
Moderator:SMURF::DENHAM
Created:Thu Mar 16 1995
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:10068
Total number of notes:35879

9280.0. "Unix v4.0b tape driver confused ?" by PANTER::MARTIN (Be vigilant...) Tue Mar 25 1997 14:36

    A customer reported a problem on a AS4100 system running DEC Unix
    v4.0b (rev 564) with the "mt -f /dev/rmt0l" command.
    
    The system acts as a tape server, it has 4 tape drives connected to 
    it (STK Redwood drives).
    
    3 devices out of 4 (rmt0, rmt2 &rmt3) reported the error message:
    
    >>	"Device busy" when we tried the "mt -f /dev/nrmtxl status"
    
    It seemed however that no processes were actually using these
    devices (checked with both lsof and ps).
    
    We wonder if the tape driver was confused by something...
    or if really a process we couldn't locate was actually using
    these devices.
    
    We forced a crash dump.
    
    Can somebody have a look at the crash dump available on 
    ftp://marchi.geo.dec.com/pub/crash-shd51.tar
    
    It contains crash-data.0 as well as vmcore.0.Z and vmunix.0.Z !
    
    Thanks in advance for your investigation,
    
    				============================
    				Alain MARTIN/SSG Switzerland
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