Re: [Xen-users] LVM

[Ardalan K <ardalanbiz@xxxxxxxxx>]

Hi Marcus,

I am amazed how you have LVM support. Because
linux-2.6.11-xen0's configuration does n't have any
module for LVM. None of the modules in xen0's config
(all those you named in your earlier email) has
anything to do with LVM. I think LVM module is called
lvm-mod. Could you or anyone verify for me that you
have this module in your xen0 kernel? I guess this is
the kernel I should look into for LVM support.

Thanks 

--- Marcus Brown <marcusbrutus@xxxxxxxxxxxxxxxx>
wrote:

> Hi,
> 
> Sounds like you've answered your own question! :)
> No LVM support in your kernel?
> Check to see if the device mapper is enabled in your
> .config.
> Here's a snippet from mine:
> #
> # Multi-device support (RAID and LVM)
> #
> CONFIG_MD=y
> CONFIG_BLK_DEV_MD=y
> # CONFIG_MD_LINEAR is not set
> CONFIG_MD_RAID0=y
> CONFIG_MD_RAID1=y
> # CONFIG_MD_RAID10 is not set
> CONFIG_MD_RAID5=y
> # CONFIG_MD_RAID6 is not set
> # CONFIG_MD_MULTIPATH is not set
> # CONFIG_MD_FAULTY is not set
> CONFIG_BLK_DEV_DM=y
> # CONFIG_DM_CRYPT is not set
> CONFIG_DM_SNAPSHOT=y
> CONFIG_DM_MIRROR=y
> # CONFIG_DM_ZERO is not set
> 
> It seems that you've compiled these as modules, and
> if your root
> is on LVM (and no initrd) then the kernel has no way
> of loading the modules.
> The simplest way is to just compile all the modules
> you need directly into
> the kernel.
> 
> Regarding sound, I've enabled my kernel for sound
> but haven't got around to
> testing it yet. The modules load, however, and an
> lspci in dom0 shows
> the card.
> 
> Marcus
> 
> 
> Ardalan K wrote:
> 
> >Thanks Marcus,
> >I had tried what you said and that had given me the
> >same error. By the way, the documentation section
> of
> >xen (section 5.3) also does n't put /dev. I think
> my
> >problem with LVM originates from the fact that
> domain0
> >does n't have LVM modules. It gives me the
> following
> >error "LVM driver/module not loaded?". I don't have
> >this problem when I boot with the plain Linux
> option
> >from Grub and that's how I set up these logical
> >volumes. I tried to configure linux-2.6.11-xen0
> >(assuming this is the domain0 kernel) to have all
> the
> >LVM and sound modules that my Suse 9.0 has but
> after I
> >boot with xen, domain0 still does n't recognize LVM
> >and my sound card. Please tell me if I am
> configuring
> >the wrong kernel or if I am doing something wrong.
> >Should I include these modules as part of
> kernel(not
> >as modules)? Do I have the right initrd? Finally, I
> >gave up on LVM and tried exporting physical devices
> >(my hda7 partition) as VBD   AND THAT WORKED! :D
> >
> >I appreciate if anyone can tell me how I can get
> >LVM/sound working. 
> >
> >Regards,
> >Ardalan
> >
> >--- Marcus Brown <marcusbrutus@xxxxxxxxxxxxxxxx>
> >wrote:
> >
> >  
> >
> >>Hi,
> >>
> >>I believe you need to specify the full name of the
> >>device node, like
> >>
> >>disk = [ 'phy:/dev/xen/dom1root,hda1,w' ]
> >>
> >>(I assume 'xen' is your volume group name)
> >>
> >>Marcus.
> >>
> >>Ardalan K wrote:
> >>
> >>    
> >>
> >>>Hi,
> >>>
> >>>After I run "xm create dom1conf -c" I get the
> >>>following error:
> >>>Using config file "/etc/xen/dom1conf".
> >>>Error: Adding extent to vbd failed: device (vbd
> >>>      
> >>>
> >>(uname
> >>    
> >>
> >>>phy:xen/dom1root) (dev hda1) (mode w)), error 8
> >>>
> >>>I am running Suse 9.0 and dom1root is the logical
> >>>volume I created for domain 1.
> >>>
> >>>My config file is as follows:
> >>>kernel = "/boot/vmlinuz-2.6.11-xenU"
> >>>memory = 64
> >>>name = "dom1"
> >>>disk = [ 'phy:xen/dom1root,hda1,w' ]
> >>>root = "/dev/hda1 ro"
> >>>extra = "4"
> >>>
> >>>Any idea what the problem might be?
> >>>Thanks in advance
> >>>
> >>>
>
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> >
> >
> >
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