[K12OSN] LVM - is anyone using this?

[Bert Rolston]

Hi Les,

Thanks for that.

I'm doing a bit of forward planning. 

I'm setting up a system that will require significant storage increase
in 12 - 18 months. In the mean time an extra drive would be a waste of
space, power and hardware.

I could simply install the new drive when required and add it's mount
point to the existing filesystem. The downside - when the HDD is full I
have to do the drive & mount point shuffle.

In Netware I could install a new drive in the machine then add some /
all of it's capacity to an existing volume. Is that a rough description
of LVM on linux?

Thanks again,
Bert

On Fri, 2004-06-25 at 19:01, Les Bell wrote:
> ert Rolston <bert.rolston at clear.net.nz> wrote:
> 
> >>
> Is anyone using LVM?
> <<
> 
> Yes - I use LVM on most of the servers I administer and even on my
> notebook; it's turned out to be useful for those cases when I add new
> drives. The easiest way to do it is to use Webmin, which has a really neat
> LVM module. Alternatively, set it up when installing - Anaconda's Disk
> Druid lets you set up LVM/RAID during the install.
> 
> If you look at our office server you can see how things have obviously been
> swapped around over the years, including the addition of a RAID 1 array:
> 
> Disk /dev/sda: 255 heads, 63 sectors, 4863 cylinders
> Units = cylinders of 16065 * 512 bytes
> 
>    Device Boot    Start       End    Blocks   Id  System
> /dev/sda1             1      4863  39062016   8e  Linux LVM
> 
> Disk /dev/hda: 255 heads, 63 sectors, 2434 cylinders
> Units = cylinders of 16065 * 512 bytes
> 
>    Device Boot    Start       End    Blocks   Id  System
> /dev/hda1   *         1         3     24066   83  Linux
> /dev/hda2             4      2434  19527007+   5  Extended
> /dev/hda5             4      1278  10241406   83  Linux
> /dev/hda6          1279      1533   2048256   83  Linux
> /dev/hda7          1534      1725   1542208+  83  Linux
> /dev/hda8          1726      1917   1542208+  83  Linux
> /dev/hda9          1918      1950    265041   82  Linux swap
> /dev/hda10         1951      1976    208813+  83  Linux
> /dev/hda11         1977      2434   3678853+  8e  Linux LVM
> 
> /dev/hda7 on / type ext3 (rw)
> none on /proc type proc (rw)
> usbdevfs on /proc/bus/usb type usbdevfs (rw)
> /dev/hda1 on /boot type ext2 (rw)
> /dev/hda8 on /opt type ext3 (rw)
> /dev/hda10 on /var type ext3 (rw)
> none on /dev/shm type tmpfs (rw)
> none on /dev/pts type devpts (rw,gid=5,mode=620)
> /dev/vg00/lv00 on /var/local/notesdata type ext3 (rw)
> /dev/vg00/lv01 on /home type ext3 (rw)
> /dev/vg00/lv02 on /home/les/download type ext3 (rw)
> /dev/hda5 on /var/isos type ext3 (rw)
> /dev/hda6 on /usr/src type ext3 (rw)
> 
> The only down side is that upgrading to the 2.6 kernel is not possible, as
> it no longer supports LVM1. Red Hat's approach will be to support Sistina,
> and I'm not sure I'm ready for that. . .
> 
> Best,
> 
> --- Les Bell, RHCE, CISSP
> [http://www.lesbell.com.au]
> 
> 
> 
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