[linux-lvm] Couple of question/confusion

[linux-lvm] Couple of question/confusion

[Scott Walker]

I started playing with LVM tonight and I am impressed... LVM + resierfs
is nice! But I have a couple problems.

Let me explain (Please offer advice if you want) I have the following
setup..
/dev/hdc1 = 1.2G
/dev/hdd2 = 7.9G
/dev/hda3 = 1.2G
/dev/sda1 = 9.11

I wanted to combine all of the above into 1 *partition* for /home. now
is LVM something I should be looking into or should I just go to linear
raid? or raid 0?

Now I create my physical volume, but when I want to create my logical I
keep recieving this error:

freedom /# lvcreate -L100G freedom
lvcreate -- only 499 free physical extents in volume group "freedom"

What am I doing wrong?

Please offer some advice, wether LVM is just overkill for me and I
should just use raid0 or linear.


-- 
Scott Walker			                Zero Knowledge Systems Inc.
scott@zeroknowledge.com			       http://www.zeroknowledge.com

There are three kinds of people: Those who can count & those who can't.

Re: [linux-lvm] Couple of question/confusion

[Daniel Whicker]

>Let me explain (Please offer advice if you want) I have the following
>setup..
>/dev/hdc1 = 1.2G
>/dev/hdd2 = 7.9G
>/dev/hda3 = 1.2G
>/dev/sda1 = 9.11
>
>I wanted to combine all of the above into 1 *partition* for /home. now
>is LVM something I should be looking into or should I just go to linear
>raid? or raid 0?


LVM is perfect for this.

>Now I create my physical volume, but when I want to create my logical I
>keep recieving this error:
>
>freedom /# lvcreate -L100G freedom
>lvcreate -- only 499 free physical extents in volume group "freedom"

>What am I doing wrong?


First, you stated that created the physical volumes... did you also create 
the volume groups?
If you didn't, you'll need to add your physical volumes to a volume group.

i.e:

# vgcreate /dev/hdc1 /dev/hdd2... etc.

At that point, type:

# vgdisplay /dev/vg00

This will tell you how many physical extents that you have available to 
create an LV.  (free PE)
To use all of them in a LV, type
# lvcreate -l <number of PEs> vg00

When you tried a lvcreate -L 100G, btw... you told it to create a 100GB 
file system.


>Please offer some advice, wether LVM is just overkill for me and I
>should just use raid0 or linear.

I'm of the opinion that LVM is *NEVER* overkill.  If you look at AIX or 
HP-UX, they use an LVM for everything.
									-Daniel
		------------------------------------------
		Daniel Whicker  (heimdall@mail.org)

RE: [linux-lvm] Couple of question/confusion

[Michael Marxmeier]

Forwarded message ...

-------- Original Message --------
From: "Volker Abele, HP" <Volker_Abele@hp.com>
To: "Scott Walker" <scott@zeroknowledge.com>, <linux-lvm@msede.com>
Subject: RE: [linux-lvm] Couple of question/confusion
Date: Mon, 31 Jan 2000 11:32:09 +0100
Resent-Date: Mon, 31 Jan 2000 16:08:33 MEZ
Message-ID: <001f01bf6bd6$6dd4a8d0$1d7b880f@nsmseva.bbn.hp.com>

Hi,

> -----Original Message-----
> From: owner-linux-lvm@msede.com [mailto:owner-linux-lvm@msede.com]On
> Behalf Of Scott Walker
> Sent: Montag, 31. Januar 2000 03:29
> To: linux-lvm@msede.com
> Subject: [linux-lvm] Couple of question/confusion
>
>
> I started playing with LVM tonight and I am impressed... LVM + resierfs
> is nice! But I have a couple problems.
>
> Let me explain (Please offer advice if you want) I have the following
> setup..
> /dev/hdc1 = 1.2G
> /dev/hdd2 = 7.9G
> /dev/hda3 = 1.2G
> /dev/sda1 = 9.11
>
> I wanted to combine all of the above into 1 *partition* for /home. now
> is LVM something I should be looking into or should I just go to linear
> raid? or raid 0?
>
> Now I create my physical volume, but when I want to create my logical I
> keep recieving this error:
>
> freedom /# lvcreate -L100G freedom
> lvcreate -- only 499 free physical extents in volume group "freedom"

-L100G means 100 Gigabyte, that�s just a little bit to much (I think
you
only
have 1.2 + 7.9 + 1.2 + 9.1 = 19.4 G - if I�m right).

>
> What am I doing wrong?
>
> Please offer some advice, wether LVM is just overkill for me and I
> should just use raid0 or linear.
>
>
> --
> Scott Walker			                Zero Knowledge Systems Inc.
> scott@zeroknowledge.com
http://www.zeroknowledge.com

There are three kinds of people: Those who can count & those who
can't.