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Conference turris::digital_unix

Title:DIGITAL UNIX(FORMERLY KNOWN AS DEC OSF/1)
Notice:Welcome to the Digital UNIX Conference
Moderator:SMURF::DENHAM
Created:Thu Mar 16 1995
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:10068
Total number of notes:35879

10053.0. "presto and bounceio mode" by NNTPD::"[email protected]" (decatl::johnson) Thu Jun 05 1997 11:49

Not sure if there is another conference where this goes, but this is the
only one I can think find...


Customer has 4.0a on a 8200.

I need to know about what bounceio means with regard to starting presto.

	o  performance issues?
	o  why it uses bounceio on one startup and not on a subsequent
		startup
	o  is there a way to keep it from going into bounceio.


Sometimes when he turns on presto, it comes up in bounceio mode.
At the current time, all the filesystems are bounceio.

he has a Symetircs Raid Box for most of his drives and is going to
try it with only the system disk then add the Symetircs Raid Box
drives.

He is concernecd, based on the documentation, that this is less than
optimal.

He says that some startups are not bounceio, but that he always
uses 
	# presto  -u
to start.  And is looking for a way to prevent the bounceio mode.

any dbx hints on examining this?

Sid Johnson  [email protected]
CSC/AT Unix Support group


[Posted by WWW Notes gateway]
T.RTitleUserPersonal
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10053.1KITCHE::schottEric R. Schott USG Product ManagementThu Jun 05 1997 21:5210
You should post the output of the presto commands, and the
storage information...

bouncio means that presto can't issue I/Os directly....it should
be consistently on or off for a particular device.

sys_check output would be best, as there are several things that
should be looked at...btw, what type of system/presto card?