consistent Media Write error (84)
I'm working on tuning the throughput of my backups, and I run into a problem.
The environment I use is a StorageTek SL8500 with T10000 tapedrives. In some documentation for this specific drive I found on the web, I found the following parameters for this drive:
NUMBER_DATA_BUFFERS is set to 16
SIZE_DATA_BUFFERS is set to 2097152
NUMBER_DATA_BUFFERS_DISK is set to 16
SIZE_DATA_BUFFERS_DISK is set to 2097152
Windows 2003 server/SP1 with NetBackup 6 MP4 (SAN Media server called APP0109), no multiplexing and no checkmark for the fragment size.
The speed I get is acceptable (round 85.000 Kb/s) although double should be possible as well.
Unfortunately EVERY TIME the backup stops at the exact same point (After running for 16.5 minutes (Having done 77406208 KB and 125 files)):
2/19/2007 3:38:01 PM - started process bpbrm (1756)
2/19/2007 3:38:01 PM - connecting
2/19/2007 3:38:01 PM - connected; connect time: 00:00:00
2/19/2007 3:38:05 PM - mounting S00261
2/19/2007 3:38:44 PM - mounted; mount time: 00:00:39
2/19/2007 3:38:45 PM - positioning S00261 to file 1
2/19/2007 3:38:48 PM - positioned S00261; position time: 00:00:03
2/19/2007 3:38:48 PM - begin writing
2/19/2007 3:54:16 PM - Error bptm(pid=2772) FREEZING media id S00261, too many data blocks written, check tape/driver block size configuration
2/19/2007 3:54:17 PM - Error bpbrm(pid=1756) from client app0109: ERR - bpbkar exiting because backup is aborting
2/19/2007 3:54:20 PM - Error bpbrm(pid=1756) could not send server status message
2/19/2007 3:54:21 PM - end writing; write time: 00:15:33
media write error(84)
What I do not understand is if the blocksize is incorrect, why it runs for quite a bit?
Anybody know what is going on?