Re: [gentoo-user] grub and what happens exactly when booting.

[Alan McKinnon]

On Fri, 16 Sep 2011 11:58:11 -0500
Dale <rdalek1967@×××××.com> wrote:

> Alan McKinnon wrote:
> > On Fri, 16 Sep 2011 10:47:01 -0500
> > Dale<rdalek1967@×××××.com>  wrote:
> >
> >> Mick wrote:
> >>> You will need to patch your kernel (in your sdb test OS) and then
> >>> you will also need to make a reiser4 fs on your sdb partition(s)
> >>> (for that you'll need to emerge sys-fs/reiser4progs). If you want
> >>> to be able to mount reiser4 from within your sda OS, you will need
> >>> of course to patch your current kernel to start with,
> >>> alternatively use a LiveCD like sysrescue which comes already
> >>> patched. For patches look in here:
> >>> http://www.kernel.org/pub/linux/kernel/people/edward/reiser4/reiser4-for-2.6/
> >>> The way I do what you are trying to do is start with the existing
> >>> OS on sda, partition sdb, tar contents of sda partitions into
> >>> corresponding sdb partitions and then modify fstab. Depending on
> >>> what you want to test you may not need grub installed into sdb's
> >>> MBR and you may not need a /boot in sdb. As long as you are not
> >>> going to remove sda from the machine you should be able to add a
> >>> couple of lines in the original grub.conf to select to
> >>> boot /dev/sdb, while using sda's MBR and /boot partition. HTH.
> >> I could have swore reiserfs4 was in the kernel.  Sure enough, it
> >> ain't. I'll wait then.  I don't want to take the chance that
> >> something goes belly up then not have a bootable way to fix things.
> >
> > reiser4 was never in the kernel and the odds of it ever making it
> > there were about zero (coding style issues and many other things
> > that pissed Linux off). And that was in the days when Hans was
> > physically located in a place where he was allowed to code.
> >
> > For all practical purposes Reiser4 is dead. I haven't heard a peep
> > out of anyone claiming to maintain it for a few years now.
> >
>
> New question.  I'm playing with LVM.  What is the best file system to
> use that with?

The best one to use is the one you want to use.

LVM has nothing to do with type of filesystem, there is no such thing
as this one works and that one doesn't. So pick the one that suits your
needs.

>  I know LVM can shrink and grow so a file system
> should be able to do the same, online would be great but not
> required.  That would be good for a / partition but not needed for
> the rest.  I can always go to single user and resize things.

Wrong question. See above.

>
> I don't want XFS tho.  I used it before and it was a total disaster.
> I have a UPS but I also recall having to pull the plug when hal
> showed up too.  No need for a repeat.
>
> Hmm, maybe I am thinking of ext4?  Life's confusing.  :/

ext4 is fine for your needs. I will be mighty surprised if your usage
ever hits ext4's limits.


-- 
Alan McKinnnon
alan.mckinnon@×××××.com