Thanks to the following for their replies:
Bryan Lavelle
Alan Davis
Dr. Tom Blinn
Alan_at_nabeth.cxo.dec.com
Basically the responses agreed that there had to a cutoff of how many
of a particular SCSCI adapter is supported in the generic kernel. It
was pointed out that the the quick specs document only 1 KZPAA being
supported & that for the CD-ROM. We have been running with 3 others
on this machine with no ill effects (connected to 2 TZ877 tape
jukeboxes & a RW536 optical jukebox). I am considering looking into
replacing them with a better SCSI adapter.
The reply from Dr. Tom Blinn pretty well covers the topic below:
>Perhaps no one else has tried to do this. I strongly suspect that
>if you dig out the relevant configuration documentation (the list of
>what is supported), you will find some limit on the total number of
>KZPAA adapters, and the number will be four or less. You identified
>the workaround. In V5.x, this would be unlikely to be an issue due
>to a fundamental change in the way most adapters are configured, but
>in the older V4.x kernels, there is usually a limitation, and you've
>hit it.
>Tom
======================================================================
Original Question:
We ran into something unexpected this past Saturday. We came in to
install a 5th KZPAA SCSI adapter in one of our AlphaServer 8400s.
After installing the card & checking the "init", "show conf" & "show
dev" to ensure that the new hardware was detected, we booted the
generic kernel in preparation for building a new kernel. During boot
of the generic kernel we did not see the expected messages for the
new SCSI adapter. After some investigation we found by using "grep
psiop /sys/conf/GENERIC" that there are only 4 entries for this
particular SCSI adapter in the generic kernel (psiop0 through
psiop3). I manually updated the configuration file in /sys/conf with
the appropriate "bus" & "controller" lines for this SCSI adapter &
built a new kernel. We booted this kernel & the appropriate messages
were displayed during boot. Apparently when the generic kernel was
setup it was assumed no one would install this many KZPAA SCSI
adapters.
We are running DU V4.0D on this particular machine, but I checked a
machine running TU V4.0G with the same results.
I was just wondering if anyone else had encountered this problem?
[=================================
[ Randy Rodgers
[ randy.rodgers_at_ci.ft-wayne.in.us
[ Senior Systems Programmer
[ Allen County/City of Fort Wayne
[ Information Systems
[ (219)427-5727
[=================================
Received on Tue Feb 13 2001 - 14:11:59 NZDT