I thought I sent this yesterday, then resent it this morning, encrypted. Sorry about that. Resending now.
> On May 24, 2015, at 2:19 PM, Dan Langille <d...@langille.org> wrote: > > >> On May 20, 2015, at 3:37 AM, Kern Sibbald <k...@sibbald.com> wrote: >> >> Hello Dan, >> >> We recently discussed a problem with logical end of tape markers on the >> newest FreeBSD system. That reminded me of the previous time we had >> problems, and it took us a very long time to find the problem 3-4 months >> if I remember right. >> >> Anyway, here is your email on the subject and the source of the file >> that we used to diagnose the problem. I would be a bit surprised if the >> current problem is the same thing, but it is probably worth trying. I >> haven't tried compiling the program recently so let me know if you have >> problems. >> >> Best regards, >> Kern >> >> PS: It took me a long time to find these attachments because I thought >> they were in the test environment, but it looks like I committed them to >> the bacula/platforms/freebsd directory. > > Compiling on FreeBSD 9.3: > > $ c++ -g -O2 -Wall -c tapetest.c > tapetest.c: In function 'void rrcmd()': > tapetest.c:327: warning: deprecated conversion from string constant to 'char*' > tapetest.c: At global scope: > tapetest.c:526: warning: deprecated conversion from string constant to 'char*' > tapetest.c:526: warning: deprecated conversion from string constant to 'char*' > tapetest.c:526: warning: deprecated conversion from string constant to 'char*' > tapetest.c:526: warning: deprecated conversion from string constant to 'char*' > tapetest.c:526: warning: deprecated conversion from string constant to 'char*' > tapetest.c:526: warning: deprecated conversion from string constant to 'char*' > tapetest.c:526: warning: deprecated conversion from string constant to 'char*' > tapetest.c:526: warning: deprecated conversion from string constant to 'char*' > tapetest.c:526: warning: deprecated conversion from string constant to 'char*' > tapetest.c:526: warning: deprecated conversion from string constant to 'char*' > tapetest.c:526: warning: deprecated conversion from string constant to 'char*' > tapetest.c:526: warning: deprecated conversion from string constant to 'char*' > tapetest.c:526: warning: deprecated conversion from string constant to 'char*' > tapetest.c:526: warning: deprecated conversion from string constant to 'char*' > tapetest.c:526: warning: deprecated conversion from string constant to 'char*' > tapetest.c:526: warning: deprecated conversion from string constant to 'char*' > tapetest.c: In function 'void do_tape_cmds()': > tapetest.c:535: warning: deprecated conversion from string constant to 'char*' > > $ c++ -g -O2 -Wall tapetest.o -o tapetest > $ > > > $ sudo ./tapetest /dev/sa0 > *rewind > Rewound /dev/sa0 > *rawfill > Begin writing blocks of 64512 bytes. > +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > weof_dev > ioctl MTWEOF error on /dev/sa0. ERR=Input/output error. > Bad status from weof -1. ERR=Input/output error > Write failed. Last block written=52274. stat=24576 ERR=No such file or > directory > * > > From /var/log/messages: > > May 24 18:17:57 knew kernel: (sa0:sym0:0:1:0): WRITE FILEMARKS(6). CDB: 10 00 > 00 00 01 00 > May 24 18:17:57 knew kernel: (sa0:sym0:0:1:0): CAM status: SCSI Status Error > May 24 18:17:57 knew kernel: (sa0:sym0:0:1:0): SCSI status: Check Condition > May 24 18:17:57 knew kernel: (sa0:sym0:0:1:0): SCSI sense: MEDIUM ERROR > asc:c,0 (Write error) > May 24 18:17:57 knew kernel: (sa0:sym0:0:1:0): Command Specific Info: 0xca7b > May 24 18:17:57 knew kernel: (sa0:sym0:0:1:0): Error 5, Retries exhausted > Sorry. I thought was was sent yesterday. The above was on a tape such as the one which raised the original issue. Next, I tried another previously unused tape. With the pthreads option, I got: ... ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ weof_dev Wrote EOF to /dev/sa0 Write failed. Last block written=1580354. stat=0 ERR=No such file or directory * Then I stopped overnight. The next day, after other backups to tape, i loaded up the tape used above $ sudo ./tapetest /dev/sa0 *rewind Rewound /dev/sa0ve. *scan Starting scan at file 0 1580354 blocks of 64512 bytes in file 0 End of File mark. End of File mark. End of tape Total files=1, blocks=1580354, bytes = -1127417856 * My conclusion: good tapes, such as the one above, just work. Bad tapes, such as the one at the top of this post, fail. They're just bad tapes. Kern: what's your conclusion? I'm happy to run more tests. — Dan Langille http://langille.org/
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