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From: pmabon@oracle.com (Pamela Mabon)
Newsgroups: comp.sys.sequent
Subject: Re: Swapping on non-b partitions
Message-ID: <1990Oct2.190648.29595@oracle.com>
Date: 2 Oct 90 19:06:48 GMT
References: <2703D039.5509@orion.oac.uci.edu>
Reply-To: pmabon@oracle.UUCP (Pamela Mabon)
Organization: Oracle Corporation, Belmont, CA
Lines: 43

In article <2703D039.5509@orion.oac.uci.edu> iglesias@draco.acs.uci.edu (Mike Iglesias) writes:
>
>We have a need to add some swap space to our Symmetry system running
>Dynix 3.0.12.  We currently have an unused h partition on one of the
>disks that could be used for swap space, but I'm not sure if Dynix can
>use that partition for swap space.  I've looked thru the manuals and
>can't find any mention of it.  Does anyone know if Dynix can swap
>on a non-b partition?
>
>
>Thanks,
>
>Mike Iglesias
>University of California, Irvine
>Internet:    iglesias@draco.acs.uci.edu
>BITNET:      iglesias@uci
>uucp:        ...!ucbvax!ucivax!iglesias


I'm a little behind in this newsgroup so if this has been answered forgive
the redundancy.

While the b partitions are the most optimal for swapping because of their 
location you can use any partiton you want including c's.  If you were to 
list all the partitions I use for swap on all my systems you'd see that at
least one of each was in use, except the a's.

There are some things to remember:
	channel/disk saturation.  Run vmstat with a short interval like 1 sec
	to see what kind of activity is already going on on the disk in question.

	NEVER make 0h a raw partition of any kind as the bootstrap will 
	eventually be overwritten (if you follow convention and make 0a
	your root partition that is)

	your /etc/fstab entry should look similar to:
	/dev/zd3h   swap        swap   sw              0 0

	And of course don't forget to add it to your kernel

	Good luck,
	
	Pam