jls2@spdcc.COM (Jeff Stoner) (03/12/90)
I have two RZ55's on a DECstation 3100. While mucking around with the system commands, I noticed that my two drives have the same configuration (using CHPT -Q command): partition bottom top a 0 32767 b 32768 163839 g 163840 649039 On the first drive (/dev/rz1* devices), the b partition is used for swapping, apparently. However, serious sifting through the manuals seems to indicate that the second drive's b partition isn't being used (this makes sense). So, I would like to recover that space to make a new filesystem for use for files (that's alot of disk space missing!). This is where the manuals get clear as mud. My impression is that the following command would do it, but I'm not willing to try it until someone else says "yeah, that's it" (can *you* say "Jeff, Dead Systems Administrator"...? I knew you could...). newfs -v -n /dev/rrz3b rz55 Or am I way off? Thanks for any help you can give... -- ====== Jeff L. Stoner === Boulder, Colo. ============ /\ = /\ ========== | Work: @coma.colorado.edu : ellery ! jls2 /\ / \ / /\ /\ --*-- Home: @boulder.colorado.edu:bearhug!jls2 /\/ \/ / / \/ /\ | News: jls2 @ ursa-major.spdcc.com /\/ \ \ /\ / \ /\
grr@cbmvax.commodore.com (George Robbins) (03/12/90)
In article <2054@ursa-major.SPDCC.COM> jls2@ursa-major.spdcc.COM (Jeff Stoner) writes: > I have two RZ55's on a DECstation 3100. While mucking around with > the system commands, I noticed that my two drives have the same configuration > (using CHPT -Q command): ... > On the first drive (/dev/rz1* devices), the b partition is used for swapping, > apparently. However, serious sifting through the manuals seems to indicate > that the second drive's b partition isn't being used (this makes sense). > > So, I would like to recover that space to make a new filesystem for use > for files (that's alot of disk space missing!). This is where the manuals > get clear as mud. My impression is that the following command would do > it, but I'm not willing to try it until someone else says... > > newfs -v -n /dev/rrz3b rz55 Yeah, that's pretty much the story. The swap area on the second drive is only used if it's both in the config file and in /etc/fstab as a swap area. You should give some thought to whether or not you want to have a secondary swap area. It isn't too hard to use it all up and there may be some performance gain from having two areas. The newfs command will do the trick as long as all the parameters for the partition on that kind of drive are present in /etc/disktab. Some of the older ones were missing blocksize but I think the newer disks are complete. You have the option of making a small 'b' filesystem or instead using the 'c' filesystem which traditionally maps the who disk... -- George Robbins - now working for, uucp: {uunet|pyramid|rutgers}!cbmvax!grr but no way officially representing: domain: grr@cbmvax.commodore.com Commodore, Engineering Department phone: 215-431-9349 (only by moonlite)
mao@eden (Mike Olson) (03/17/90)
In article <10114@cbmvax.commodore.com>, grr@cbmvax.commodore.com (George Robbins) writes: > In article <2054@ursa-major.SPDCC.COM> jls2@ursa-major.spdcc.COM (Jeff Stoner) writes: >> I have two RZ55's on a DECstation 3100. While mucking around with >> the system commands, I noticed that my two drives have the same >> configuration ... >> newfs -v -n /dev/rrz3b rz55 > You should give some thought to whether or not you want to have a secondary > swap area. you may also want to reserve this as swap space, so that you can boot off the second drive if the first dies. this would be uncomfortable if there were a file system on the b partition. mike olson postgres research group uc berkeley mao@postgres.Berkeley.EDU
meissner@osf.org (Michael Meissner) (03/17/90)
In article <23119@pasteur.Berkeley.EDU> mao@eden (Mike Olson) writes: | In article <10114@cbmvax.commodore.com>, grr@cbmvax.commodore.com | (George Robbins) writes: | > In article <2054@ursa-major.SPDCC.COM> jls2@ursa-major.spdcc.COM | (Jeff Stoner) writes: | >> I have two RZ55's on a DECstation 3100. While mucking around with | >> the system commands, I noticed that my two drives have the same | >> configuration ... | >> newfs -v -n /dev/rrz3b rz55 | > You should give some thought to whether or not you want to have a secondary | > swap area. | | you may also want to reserve this as swap space, so that you can boot off | the second drive if the first dies. this would be uncomfortable if there | were a file system on the b partition. One thing I did once when mananging a UNIX system was to put /tmp on the secondary filesystem where swap went on the first disk and just do mkfs before mounting it. That way you don't waste disk space (if disk space is tight), but you can still boot off of a secondary disk if problems come up. -- Michael Meissner email: meissner@osf.org phone: 617-621-8861 Open Software Foundation, 11 Cambridge Center, Cambridge, MA Catproof is an oxymoron, Childproof is nearly so