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Message-ID: <4D9F485D.2010300@gmail.com>
Date: Fri, 08 Apr 2011 12:39:41 -0500
From: Dale <rdalek1967@gmail.com>
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Subject: Re: [gentoo-user] LVM for data drives but not the OS
References: <4D9D9071.2050504@gmail.com> <20110407143351.EBADA1391@data.antarean.org> <4D9F3716.3090708@gmail.com> <201104081846.47629.alan.mckinnon@gmail.com>
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Alan McKinnon wrote:
> Apparently, though unproven, at 18:25 on Friday 08 April 2011, Dale did opine
> thusly:
>
>
>> I'm going to give this a stab here. I go buy a new drive. I use cfdisk
>> to make it ready for LVM, the 8E thingy.
>>
> Yes
>
>
>> I then tell LVM to make it a
>> Physical Volume, either in whole or in part.
>>
> Yes
>
>
>> I then tell LVM to make it
>> a Volume Group
>>
> No.
>
> You add the PV to a Volume Group (which will be created if necessary)
>
>
Yea, I didn't type that in the way I meant it. PV is the bottom level,
then VG goes on top of that then the LV. I think I am typing that in
right. Basically, I create the PV first, then the VG then the LV. <
scratches head a bit> I think I get it but may need better wording.
>> and if I already had a drive using LVM I could then add
>> the new drive to it.
>>
> Yes.
>
>
>> After that, I create Logical Volumes and put file
>> systems on it for use sort of like the old partitions.
>>
> Yes. Once you have made the LV, you then do this:
>
> mkfs /dev/mapper/<whatever>
>
> instead of
>
> mkfs /dev/sda1
>
> The kernel sees /dev/mapper/<whatever> as just another block device (aka
> something it can mkfs)
>
>
So when I get ready to make a file system, say ext3, then it would be
mkfs.ext3 /dev/mapper/<whatever>. Then it would be ready to put stuff on.
>> Am I sort of getting on the right track?
>>
> Spot on
>
>
>> Did someone mention a GUI for this? ^-^
>>
> Piffle. GUIs for LVM confuse the issue. Stay away from them like the plague.
>
>
That is likely a good idea too. I get used to the GUI then if the GUI
can't work, maybe X won't come up or something, then I have no idea
where to start. Good advice.
Thanks.
Dale
:-) :-)