On Wed, 28 Oct 2009 10:39:48 +1100 Robert Collins <robe...@robertcollins.net> wrote:
> On Tue, 2009-10-27 at 13:15 +1100, Bill Donoghoe wrote: > > > > 1. What do I need to do to get Ubuntu to use 4Gb RAM? My current > > Jaunty > > installation only recognises around 3Gb. Is this just a kernel > > upgrade > > or .... > > If I remember correctly we don't support > 3GB on 32-bit installs > anymore - the performance overhead is terrible. AIUI you can however > run a 32 bit userspace on a 64-bit kernel - but I've not done this so > can't offer advise ;). There /may/ be a kernel flavour that has PAE > turned on > - check the server flavours. (But again, warning, slow). al...@stormy:~/data$ uname -a Linux stormy 2.6.26-2-686-bigmem #1 SMP Sat Oct 17 18:25:48 UTC 2009 i686 GNU/Linux I haven't noticed any performance hit. Box is Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz with 4GB of memory. My stuff is mostly NOT cpu intensive, but I do an occasional compile (LyX) and LaTeX large documents. No observable change. Cheers, Alan > > > 2. How complicated is it to move my "linux setup" from a single > > partition to > > the lvm partitions on the larger disk. My latest thought is to: > > a. update Ubuntu on the hard disk to match the current working > > environment > > (fix apt-get config files and/or dpkg -l on both and diff them, and > > them > > update) > > b. If I copy /usr and /var from the working environment to the new > > environment will that cause problems? (it will save re-installing > > some software that isn't managed by apt) > > c. copy /home from working environment to new disk (recommended > > method? > > rsync to new drive connected via USB?) > > d. use pgdump / pgrestore to move postgres databases across > > e. Backup new disk > > f. find out what doesn't work? What have I missed? > > Sure, or you could: > partition the new disk > boot into readonly single user mode > mount the new partitions somewhere sensible > rsync everything to them. > reboot > > -Rob > -- Alan L Tyree http://www2.austlii.edu.au/~alan Tel: 04 2748 6206 -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
