Asynchronous IO - SUMMARY

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Hello,
        The general concensus was that asynchronous IO was enabled by default
and this had been comfirmed by a SUN engineer. however Michael Zika dug up
the following info on the subject....

>From the Sun White Paper on mixed fast/slow SCSI busses:

     For Solaris 2.x:

                To change to the slowe asynchronous data rate,
                add the following line to /etc/system file:
 
                        set scsi_options = 0x58
 
                then reboot the system.
 

                To turn synchronous transfer back on at the
                highest possible speed without using tagged
                queueing, change the scsi_options line to:

                        set scsi_options = 0X178

                To turn synchronous transfer back on at the
                highest possible speed allowing tagged queueing
                (if available in the operating system),
                change the scsi_options line to:

                        set scsi_options = 0X1f8

--Michael Zika
  (zika@fatman.tamu.edu)

Thanks to all who replied

bill@aloft.att.com
lmj@pasteur.fr
aika@fatman.tamu.edu
vnp@cesdrp02.kodak.com

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