[linux-lvm] newbie question

[Eric M. Hopper]

On Fri, Feb 02, 2001 at 04:08:49PM +0100, JAmes wrote:
> 
> Another question I have is can anybody show me a good install plan, a
> partition scheme for a machine where everything but the / is lvm'ed. I
> haven't seen this discussed anywhere. At the moment I am just testing on a
> box with a partition / a swap and a /home .
> 
> If I did a standard installation using say 5 partitions / /usr /var/ /home
> swap, it would be a pain transferring this to an lvm system. So how do you
> lot do it ? WHat sort of installation do you do?
> 
> my partitions at the moment
> 
>  Device Boot    Start       End    Blocks   Id  System
> /dev/hda1   *         1       608   4883728+  83  Linux
> /dev/hda2           609       627    152617+  82  Linux swap
> /dev/hda3           628       749    979965   83  Linux
> /dev/hda4           750      1601   6843690    5  Extended
> /dev/hda5           750       871    979933+  8e  Linux LVM
> /dev/hda6           872       993    979933+  8e  Linux LVM
> /dev/hda7           994      1601   4883728+  8e  Linux LVM
> 
> Thanks again.

	One thing I can say right now is that you _don't_ want more than
one LVM partition on any given physical device.  Actually, it isn't that
bad of a problem unless you try to use LVM to do striping.  Then LVM
gets confused about what is and what isn't a seperate physical device.
Striping across /dev/hda5 and /dev/hda6 in your partitioning scheme
would be a performance disaster.

Here is my partitioning scheme:
   Device Boot    Start       End    Blocks   Id  System
/dev/hda1             1      9859   4968904+   b  Win95 FAT32
/dev/hda2         15457     59303  22098888   8e  Linux LVM
/dev/hda4          9860     15456   2820888   83  Linux  (spare unused)

(That Win95 partition is actually completely unused, and left over from
when I did used to run Win95.)

(The spare unsused partition is used for installing new versions of Linux
from distributions that are neither LVM nor reiserfs aware.)

   Device Boot    Start       End    Blocks   Id  System
/dev/hdc1             1       102     51376+  83  Linux  (/boot)
/dev/hdc2           103     59554  29963808    5  Extended
/dev/hdc5         15708     59554  22098856+  8e  Linux LVM
/dev/hdc6           103     14666   7340224+  83  Linux  (/)
/dev/hdc7         14667     15707    524632+  82  Linux swap

	Notice that there is only one LVM partition per device.  If I
could do it again, I would put swap closer to the beginning of the
device (right after /boot).  Hard-drives typically access data near
their beginning faster.

Have fun (if at all possible),
-- 
The best we can hope for concerning the people at large is that they
be properly armed.  -- Alexander Hamilton
-- Eric Hopper (hopper at omnifarious.mn.org http://www.omnifarious.org/~hopper) --
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