LVM problem <SOLVED>

[Robin Laing]

Andrew B. Young wrote:
> Can anybody point me to a white paper or something that discusses the advantages of using LVM, especially on a single disk PC?  I have not seen the reason to use it on my home (single drive) PC.
> Six years ago, using HP-UX, LVM was a nice fit to merge multiple 4GB and 9GB SCSI disks together to from single LVs for chip designers who saved lots of data.  But now, with cheap 200GB IDE drives, that problem went away.
> tx,andyy
> 
> -----Original Message-----
> From: Patrick Nelson <pnelson at neatech.com>
> Sent: Oct 6, 2005 8:43 AM
> To: For users of Fedora Core releases <fedora-list at redhat.com>
> Subject: Re: LVM problem <SOLVED>
> 
> Robin Laing wrote:
> 
> 
>>Patrick Nelson wrote:
>>
>>
>>>FC4 Updated
>>>
>>>Trying to setup a LV on a FC4 setup for home and opts.  Here is the 
>>>process:
>>>
>>>pvcreate /dev/hda1
>>>
>>>vgcreate homeVG /dev/hda1
>>>
>>>lvcreate -L4G -mhomeLV homeVG
>>>
>>>mkfs.ext3 /dev/homeVG/homeLV
>>>
>>>but when I do the step of mkfs.ext3 I get an error of :
>>>mke2ffs 1.37 (21-Mar-2005)
>>>Could not stat /dev/homeVG/homeLV --- permission denied
>>>
>>>ls -la /dev/homeVG/ shows that a link of homeLV -> 
>>>/dev/mapper/homeVG-homeLV which has permissions of:
>>>
>>>brw-rw---- root disk 253, 2 Oct 4 17:25
>>>
>>>Anyone have an idea on what is going wrong?
>>>
>>
>>Did you try the graphical tool?  I ask this as I ran into the same 
>>problem last weekend.  My first attempt at LVM.  Worked like a dream. :)
>>
>>Desktop > System settings > Logical Volume Management
>>
>>I was in to much of a rush to wait.
>>
> 
> No I have not tried the tool, but I did finally get it working.
> 
> I tried rebooting and that left the system locked at the Volume Manager 
> stage.  So I rescued booted the system and then chroot /mnt/sysimage and 
> then I removed the LV and VG and then I repartioned the HD and then did:
> 
> pvcreate /dev/hda1
> vgcreate homeVG /dev/hda1
> lvcreate -L4G -mhomeLV homeVG
> mkfs.ext3 /dev/homeVG/homeLV
> 
> and it worked.  So I continued and got all the my VG and LVs up and 
> working.   Then I fixed up the /etc/fstab and it rebooted normally!  
> Woho, but I'm not totally sure what happened when I was initially 
> setting it up. 
> 

200Gb just isn't enough.  I just put in 300 gb and going to add teh 
old 100G to the LVG to allow for videos and music and data files to be 
stored.

I was unsure about LVG as I could just mount drives in subdirectories. 
  It was the fact that LVG would allow this to be done transparently 
is the selling point to me.

I have calculated that I would need about 1TB to do what I want.  I am 
looking at RAID arrays.

-- 
Robin Laing
Instrumentation Technologist   Voice: 1.403.544.4762
Military Engineering Section   FAX:   1.403.544.4704
Defence R&D Canada - Suffield  Email: Robin.Laing at DRDC-RDDC.gc.ca
PO Box 4000, Station Main      WWW:http://www.suffield.drdc-rddc.gc.ca
Medicine Hat, AB, T1A 8K6
Canada