4.1.1 Kernel panic and Tapes (rst0, rst1)

[Jacques EUDES]

Since I have installed SunOS 4.1.1 on my sun's (sun3/260 and sun4/330) I
have notice some troubles with my tapes (Exabyte and QIC).  Sometimes the
kernel lost the tape synchronisation and panic !!!

Here are my kernel messages :
...
May  3 10:59:05 babbage vmunix: st0:  tape synchronization lost
May  3 10:59:05 babbage vmunix: panic: psig action
May  3 10:59:05 babbage vmunix: syncing file systems... [4] [3] [1] done
...

May somebody know the problem??  Is this a 4.1.1 Os know BUG?

Please answer by e-mail at eudes at imag.fr.