iglesias@draco.acs.uci.edu (Mike Iglesias) (09/29/90)
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
brsmith@cs.umn.edu (Brian R. Smith) (09/29/90)
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? Sure. We desperately needed more swap space, so we turned the c partition (all) of a SCSI drive (yea, SLOW) into swap space. When you specify swap paritions in the config file for your kernel (/usr/sys/conf/<whatever>), if you say just "zd0" or "sd1", config assumes the b partition. Just specify the parition you want to swap on, and it should work. I.E., we have: ## kernels to configure ## config dynix_zd root on zd0a swap on zd0 and zd1 and zd2 and sd1c Feel free to ask me if you have any problems. (I'm not saying I can fix them... :-) Brian brsmith@cs.umn.edu
neal@sequent.UUCP (Neal Wyse) (09/30/90)
As some else mentioned, no problem swapping on partitions other than the b partition. On a drive that you boot from (typically drive 0), don't use the h partition (or any partition that starts at the beginning of the disk) as a swap or raw partition as this will clobber the boot block at some point. On drives that you don't boot from, the h partition is fair game. Neal Wyse ... uunet!sequent!neal
pmabon@oracle.com (Pamela Mabon) (10/03/90)
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