[linux-lvm] LVM and transferring filesystem

[linux-lvm] LVM and transferring filesystem

[Miguel González Castaños]

dear all,

 I am installing a redhat 7.3 linux box with X-Window.

 I have installed LVM splitting the system with the following scheme:

 /boot and / are installed each in different non-LVM partitions.

 LVM volumes:

 /usr , /var/ , /tmp

 I have noticed that when I mount the filesystem using the LVM volumes
my X-Windows server doesnt work, but when I deactivate the LVM volumes
using the original configuration stored in the original / partition
(which still have the original /var, /tmp, /usr partitions) then
X-Window works perfectly.

 Then I assume that I havent transferred the filesystem well.

 I use from / the following command from the LVM howtos:

 tar cplf - -C var .|tar xvlf - -C /mnt/var

 and the same thing for the rest of partitions.

 Any suggestion?

 Many thanks in advance

 Miguel

Re: [linux-lvm] LVM and transferring filesystem

[William Blunn]

>  I am installing a redhat 7.3 linux box with X-Window.
> 
>  I have installed LVM splitting the system with the following scheme:
> 
>  /boot and / are installed each in different non-LVM partitions.

Smart move.

>  LVM volumes:
> 
>  /usr , /var/ , /tmp
> 
>  I have noticed that when I mount the filesystem using the LVM volumes
> my X-Windows server doesnt work, but when I deactivate the LVM volumes
> using the original configuration stored in the original / partition
> (which still have the original /var, /tmp, /usr partitions) then
> X-Window works perfectly.
> 
>  Then I assume that I havent transferred the filesystem well.
> 
>  I use from / the following command from the LVM howtos:
> 
>  tar cplf - -C var .|tar xvlf - -C /mnt/var
> 
>  and the same thing for the rest of partitions.
> 
>  Any suggestion?

Permissions on /tmp ?

Should be 1777 (drwxrwxrwt).

To copy filesystems, I use:

  rsync -avxSHW --delete /var/ /mnt/var

This has the added benefit that you can copy most data over whilst the system is up and running.

Then you can take it down to single user, do the rsync again, and only the changed data will need to be copied.

This minimises the time the system is in single user (which is good if you are working on a server).

Bill
-- 
William H. Blunn - <bill+s.9sfuw6uo@tao-group.com> - Developer Support
Tao
62/63 Suttons Business Park, Earley, READING, RG6 1AZ, United Kingdom
Tel: +44 118 901 2999 - Fax: +44 118 901 2963 - http://tao-group.com/

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Re: [linux-lvm] LVM and transferring filesystem

[Miguel González Castaños]

Hello,

 Many thanks for your promptly answer.

 It works perfectly. I didnt know very much about the rsync command, i thought that It was only used to synchronize

files between hosts.

 I also would like to know which is the best approach now, should i delete the original directories? any change in
the LVMed partitions will not be reflected in the original ROOTed directory but If I delete them, I wont be able
to boot without LVM (in the case I would need it and my LVMed partitions got corrupted).

Many thanks in advance

Miguel

William Blunn ha escrito:

> >  I am installing a redhat 7.3 linux box with X-Window.
> >
> >  I have installed LVM splitting the system with the following scheme:
> >
> >  /boot and / are installed each in different non-LVM partitions.
>
> Smart move.
>
> >  LVM volumes:
> >
> >  /usr , /var/ , /tmp
> >
> >  I have noticed that when I mount the filesystem using the LVM volumes
> > my X-Windows server doesnt work, but when I deactivate the LVM volumes
> > using the original configuration stored in the original / partition
> > (which still have the original /var, /tmp, /usr partitions) then
> > X-Window works perfectly.
> >
> >  Then I assume that I havent transferred the filesystem well.
> >
> >  I use from / the following command from the LVM howtos:
> >
> >  tar cplf - -C var .|tar xvlf - -C /mnt/var
> >
> >  and the same thing for the rest of partitions.
> >
> >  Any suggestion?
>
> Permissions on /tmp ?
>
> Should be 1777 (drwxrwxrwt).
>
> To copy filesystems, I use:
>
>   rsync -avxSHW --delete /var/ /mnt/var
>
> This has the added benefit that you can copy most data over whilst the system is up and running.
>
> Then you can take it down to single user, do the rsync again, and only the changed data will need to be copied.
>
> This minimises the time the system is in single user (which is good if you are working on a server).
>
> Bill
> --
> William H. Blunn - <bill+s.9sfuw6uo@tao-group.com> - Developer Support
> Tao
> 62/63 Suttons Business Park, Earley, READING, RG6 1AZ, United Kingdom
> Tel: +44 118 901 2999 - Fax: +44 118 901 2963 - http://tao-group.com/
>
> The contents of this e-mail and any attachments are confidential and may
> be legally privileged. If you have received this e-mail and you are not
> a named addressee, please inform us as soon as possible on
> +44 118 901 2999 and then delete the e-mail from your system. If you are
> not a named addressee you must not copy, use, disclose, distribute,
> print or rely on this e-mail. Any views expressed in this e-mail or any
> attachments may not necessarily reflect those of Tao's management.
> Although we routinely screen for viruses, addressees should scan this
> e-mail and any attachments for viruses. Tao makes no representation or
> warranty as to the absence of viruses in this e-mail or any attachments.
> Please note that for the protection of our business, we may monitor and
> read e-mails sent to and from our server(s).
>
> _______________________________________________
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> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/