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From: Mick <michaelkintzios@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] separate / and /usr to require initramfs 2013-11-01
Date: Sat, 28 Sep 2013 09:30:23 +0100
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On Saturday 28 Sep 2013 01:39:57 David W Noon wrote:
> On Sat, 28 Sep 2013 01:10:14 +0200, Alan McKinnon wrote about Re:
>=20
> [gentoo-user] separate / and /usr to require initramfs 2013-11-01:
> > On 28/09/2013 00:57, Dale wrote:
> > > Bruce Hill wrote:
> > >> On Fri, Sep 27, 2013 at 05:33:02PM -0500, Dale wrote:
> > >>> I'm hoping that since I use eudev, I don't have to worry about
> > >>> this. If I do, this could get interesting, again. Dale
> > >>=20
> > >> Do you have /usr separate from / ?
> > >=20
> > > Yep. From my understanding tho, eudev is not supposed to be
> > > affected by this problem tho.
> > >=20
> > > One reason for this being seperate, I have / and /boot on a regular
> > > partition and everything else on LVM. Sometimes that /usr gets a
> > > bit full. It's not so bad after I moved all the portage stuff out
> > > and put it in /var. Now I have to watch /var too. lol
> >=20
> > Ask yourself this question:
> >=20
> > Why do you have /usr separate?
> >=20
> > No really, *why exactly*?
>=20
> You write as though you expected the question to be regarded as
> rhetorical.
>=20
> I can't speak for Dale, but since I have much the same arrangement
> (with /boot and / on physical partitions and everything else under LVM2
> control) I shall write from my perspective.
>=20
> The reason I have /usr separate is so that I can have it striped
> without needing an initramfs.
>=20
> > One of the very first things you do with /usr at boot time is mount
> > it, and from then on you use it exactly as if it were always on /
> > anyway.
>=20
> No. The I/O characteristics of a striped /usr are rather different from
> those of / on a simple partition.
>=20
> > I'll bet that since you moved all of portage out, your mount
> > options and fs configs are the same between the two anyway.
>=20
> Again no. My portage volume has different mount options from /usr, as
> it has nosuid and noexec in force. The portage volume is not striped
> either, as it does not get as much I/O traffic as /usr.
Another reason that I have seen mentioned for running /usr separately is to=
=20
mount it as read only for security reasons. It is a moot point how much th=
is=20
improves security, other than by yourself when you run 'rm -Rf /usr' one da=
y=20
by mistake. ;-)
=2D-=20
Regards,
Mick
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