🚀 go-pugleaf

Hello...

Our 5000/200 running Ultrix 4.3 is experiencing lots of unexplained
hangs recently.  At first, we blamed the problem on a non-DEC drive,
but this weekend we remove the odd drive and replaced it with an RZ58,
but another hang took place since then.

Basically, we hear the "beeper" on the tkz30 drive beep a couple of times,
then all SCSI disk activity stops.  The system is alive and well, but
no I/O can be done.  Since nothing can be written to the disk, we are
unable to determine the true cause of the problem.  The only fix is to
reboot the 200, which clears up the problem for anywhere from 10 minutes
to several days.

uerf does show a number of errors that we don't what to do about...

********************************* ENTRY     2. *********************************
EVENT CLASS                             ERROR EVENT 
OS EVENT TYPE                  199.
SEQUENCE NUMBER                435.
OPERATING SYSTEM                        ULTRIX 32 
OCCURRED/LOGGED ON                      Tue Nov 21 09:10:49 1995 EST
OCCURRED ON SYSTEM                      water 
SYSTEM ID                 x82020220     HW REV: x20
                                        FW REV: x2
                                        CPU TYPE: R2000A/R3000 
PROCESSOR TYPE                          KN02/R3000 
CLASS                              
SUBSYSTEM                          
ROUTINE NAME                            xpt_ccb_alloc() 
                                        XPT Packet Pool HIGH Water Mark 
                                         _Reached. 
CAM ENTRY                          

...are these serious?  Are they related to SCSI bus activity?  What
can we do about them?

Our hardware consists of a RZ56 at rz0, RZ58 at rz1, and a tkz30 at
rz5.

Any clues or cures would be appreciated!

Bob Applegate
Water Wheel Systems
bob@waterw.com