[rescue] SCSI problem.

Sandwich Maker adh at an.bradford.ma.us
Thu Jul 24 09:20:53 CDT 2003

"From: "Curtis H. Wilbar Jr." <rescue at hawkmountain.net>
">From: adh at an.bradford.ma.us (Sandwich Maker)
">"From: "Curtis H. Wilbar Jr." <rescue at hawkmountain.net>
">">From: adh at an.bradford.ma.us (Sandwich Maker)
">">there's a way to turn tcq off for an entire bus or an individual
">">target, but i dunno the details.  iirc it goes in /etc/system though.
">"Actually I think you need to set scsi-options or target<n>-scsi-options
">"(where <n> is the target of the drive) in /kernel/drv/<device>.conf
">"file (where <device> is esp, isp, fas, etc...).  For more info
">"see the man pages for esp.
">but you can also patch the driver on the fly with either ndd or
">/etc/system entries.
"didn't know you could set these values after boot ?  Didn't notice
"that in the man pages anyway.  

well, since there doesn't seem to be a ndd interface, i think you're
right on this.

"I thought /etc/system is only read at bootup, so how would you do
"anything with /etc/system "on the fly" ?

it is, but it beats messing with driver conf files.
from man -s4 system:
set [<module>:]<symbol> {=, |, &} [~][-]<value>

"Also, in this case, something permanent is desired, so something in
"/etc/system or the apprpopriate conf file in /kernel/drv is desired
"(if ndd will set these values, then that would be good to test out
"if disabling it will solve the problem though (w/o having to reboot)).

i've also seen ndd in an rc file recommended over /etc/system [for
tuning the ip stack], though i'm not sure i approve.  and ndd only
works if there's a /dev entry, which there isn't for scsi drivers.

you can do things in system that ndd can't reach.
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh at an.bradford.ma.us                       and think what none thought

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