SC44Ge HBA w/ StorageWorks Ultra 448 SAS TBU getting MS 2003 Server Event Error 11

I have an HP ML350 G5 server running MS SBS 2003 R2 SP2.  I have installed a Tape backup solution consisting of an HP SC44Ge HBA w/ StorageWorks Ultra 448 SAS TBU.  I am running Symantec Backup Exec version 12.  When all were initially installed all was OK.  But after a week (5 days) of normal operation we start getting Event Error ID 129  which is immediatly followed by and Event Error ID: 11.  I have updated the HBA BIOS and firmware.  I have replaced the HBA controller twice and the TBU one time.  Every time I reinstall Back Exec or replace the hardware it seems to work for awhile and then the errors are reproduced.
mford1959Asked:
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mford1959Connect With a Mentor Author Commented:
The actual solution was replacing a bad storage controller cable.  It would operate intermittantly due to heat changes which would affect the wiring connectivity.
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dovidmichelCommented:
enable logging on the switch and ck for errors, this can help identify if the problem is on the server or tape library end.
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mford1959Author Commented:
I solved the problem myself.
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