I see that after tons of complains about this very same issue there is no concrete solution from Veritas support staff.
Since I have number of BENT installations (9.1 and 10.0) I watch these forums regularly and this issue with incorrect block size is more than often. Regardless of OS/hardware/service packs installed lot of administrators run into this, which is now safe to say, bug.
It is not normal that you have to long erase ALL your tapes to workaround this bug. And then to find out that didn't do the trick.
Once again I'm asking for some concrete help regarding this bug:
Again on different location one of my clients reported this error with incorrect block size,
they have W2k3 SBS installed with BENT 10.0.
For a couple of weeks backups ran fine and than they start to fail with the same error message.
I tried that technote 190750 (btw, did that help anyone?) and no good.
Re-installed and installed number of various drivers.
Did what I've done last time to work around and that is to install latest Veritas tape drivers - didn't help.
Now I'm running out of options and facing serious situation with my client who paid a lot of money for implementation of Veritas Backup software which isnt working at all.
Thank you and regards,
Igor Duzevic
P.S.
I did not experience this problem on any of my 9.1 installations, frankly I cannot advise my clients to upgrade to 10.0. Should I expect this error on every 10.0 installation after short period of time?