Josh Fisher schrieb: > > This can happen when ClearPageReserved() is not called for a reserved > kernel memory page. Could be an iSCSI driver (included with the Linux > kernel) problem or, if you are using a hardware iSCSI adapter, it could > be a problem with its driver. > >> My question is: What is the difference between the tape write actions of >> tar and btape? Maybe I will be able to configure the tape device so that >> btape doesn't run in kernel panics any more? >> > > Well, btape is very likely using a different block size than you used > with tar. The default block size for btape is 126x512 = 64,512 bytes. > The default for tar is 20x512 = 10,240 bytes. Try setting 'Maximum block > size = 10240' and 'Minimum block size = 10240' in the bacula-sd.conf > config file being used by btape. If that works, then try tar with '-b > 64512' and see if tar causes the same problem with large block sizes. If > neither wroks with the larger block size, then you will have to use the > smaller block size until the iSCSI bug is fixed. >
Thanks Josh, I think the blocksizes are a step in the right direction - but no solution yet. In the meantime I changed the iSCSI-Switch and did a few more tests: - tar xv -f /dev/nst0 -b 126 /var => no Problems (I think -b 126 is right because - according to the manpage - tar multiplies option -b with 512, 126x512 = 64512) - btape HP-LTO2, rawfill (maximum block size set to 10240) => panic Output was: *rawfill btape: btape.c:2496 Begin writing raw blocks of 10240 bytes. + - btape HP-LTO2, rawfill (maximum block size set to 8192) => panic Output was: *rawfill btape: btape.c:2496 Begin writing raw blocks of 8192 bytes. ++ Any further ideas? -- Regards Christoph ________________________________________________________________________ Christoph Litauer [EMAIL PROTECTED] Uni Koblenz, Computing Center, http://www.uni-koblenz.de/~litauer Postfach 201602, 56016 Koblenz Fon: +49 261 287-1311, Fax: -100 1311 PGP-Fingerprint: F39C E314 2650 650D 8092 9514 3A56 FBD8 79E3 27B2 ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
