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Date: Wed, 7 Sep 2011 23:30:16 -0400
Message-ID: <CADPrc83k2zzO6C97M+gXU1tRn6DXstz7B0tWvsrdX0iJmkhP7g@mail.gmail.com>
Subject: Re: [gentoo-user] /dev/sda* missing at boot
From: =?UTF-8?B?Q2FuZWsgUGVsw6FleiBWYWxkw6lz?= <caneko@gmail.com>
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On Wed, Sep 7, 2011 at 7:55 PM, Neil Bothwick <neil@digimed.co.uk> wrote:
> On Wed, 7 Sep 2011 19:04:17 -0400, Canek Pel=C3=A1ez Vald=C3=A9s wrote:
>
>> > Putting it on a logical volume is one advantage, allowing /usr to be
>> > resized should the need arise.
>>
>> Why not allow / to be resized entirely? You probably will take the
>> machine off-line anyway.
>
> Because you can't boot from an LV, so you'd than need a separate /boot
> and an initramfs. Without LVM, you are unlikely to be able to resize /
> or /usr as it is not usually the last partition on the drive.
So, you guys want a separated /usr, but don't want a separate /boot. Awesom=
e.
>> >> Mounting it read-only
>> >> seems the only sensible one, and then I think is better to go all the
>> >> way and mount / read-only.
>> >
>> > Putting /etc on a read-only filesystem seems a really bad idea.
>>
>> mount -o remount,rw /
>> emerge --sync && emerge -uDNv world
>> dispatch-conf
>> mount -o remount,ro /
>>
>> Or, if you only want to modify some configuration file (which in a
>> sane environment doesn't happen that often):
>>
>> mount -o remount,rw /
>> adduser fulano ...
>> mount -o remount,ro /
>
> This is longer than the init script needed in an initramfs. I wonder what
> problems you'd have when booting as the kernel tries to update the likes
> of /etc/mtab on a read-only fs.
# ls -l /etc/mtab
lrwxrwxrwx 1 root root 17 Dec 1 2010 /etc/mtab -> /proc/self/mounts
I don't see any problem at all.
>> Again, I don't see the reason for a separated /usr.
>
> That doesn't mean there aren't several valid reasons to do so.
I didn't say they were invalid, I say that *I* don't see the reason to
separate /usr. The arguments exposed just don't convice me. But
anyway, you will be able to do it with an initramfs.
>> But *again*, if
>> that's what you want, you will be able to do it. You will just need an
>> initramfs.
>
> I neither have nor need one at the moment, which means this update will
> break my system.
Then don't update. Wanna keep up with upstream? Then accept that
sometimes you will need to change your setup, and change how you do
stuff.
Regards.
--=20
Canek Pel=C3=A1ez Vald=C3=A9s
Posgrado en Ciencia e Ingenier=C3=ADa de la Computaci=C3=B3n
Universidad Nacional Aut=C3=B3noma de M=C3=A9xico