[linux-lvm] RE: Urgent, Moving disk from hdc to hdf in existing lvm

[Heinz J . Mauelshagen]

On Thu, Aug 29, 2002 at 11:08:58AM -0500, Kalle wrote:
> -"howly magic lvm, batman"...it was that easy! :)
> 
> btw.. I was digging though the /etc/lvmtab.d and /etc/lvmconf, thats the metadata right?

Yes,  copies of the metadata of all VGs sit in /etc/lvmtab.d/ to be accessed
by the tools for performamce reasons.

/etc/lvmconf/ contains archives of the metadata with a default history depth
of 10. IOW: you can backout 10 levels in case configuration changes go wrong
presuming that you didn't write data to changed LVs potentially
overwriting extents previously allocated to other LVs.

Regards,
Heinz    -- The LVM Guy --

> 
> I did a "strings /etc/lvmtab.d/raidset1" before I ran vgscan, and it listed the old device names.
> 
> Should it have been possible to edit that file with a hexeditor and gotten the same result?

Hacky but possible :)

> Whats the difference between the dir /etc/lvmtab.d and /etc/lvmconf dir?

See above.

> 
> 
> /Regards Kalle
> 
> >Kalle,
> >
> >any configuration change schould be happily covered by "vgscan ; vgchange -ay".
> >
> >vgscan figures out all PVs by UUID and groupd them together no matter to
> >which changed path they are attached.
> >
> >Regards,
> >Heinz    -- The LVM Guy --
> >
> >
> >On Thu, Aug 29, 2002 at 06:19:27AM -0500, kalle at idlar.nu wrote:
> >> Hello!
> >> 
> >> We have a problem with one of our servers thats running lvm on linux-2.4.19.
> >> We have 4 discs in the vg, hdb, hdc, hdg and hdh.
> >> When we booted the server this morning hdc did not get online. 
> >> We've tried diffrent cables but there seems to be some problem with the secondary controller.
> >> The disc gets online if we put it on the promise controller thats handeling hdg and hdh.
> >> 
> >> Is it possible to "reconfigure" the vg so that the disk that once was hdc will be hdf? Prefably without loosing data.
> >> 
> >> Unfortunately we dont have any spare box to move the disks to, so the reconfiguring has to be done with 
> >> the old hdc disk already beeing installed as hdf.
> >> 
> >> Any comments appreciated!
> >> 
> >> 
> >> /Regards Kalle
> >> 
> >> 
> >> _______________________________________________
> >> linux-lvm mailing list
> >> linux-lvm at sistina.com
> >> http://lists.sistina.com/mailman/listinfo/linux-lvm
> >> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
> >
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> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen at Sistina.com                           +49 2626 141200
                                                       FAX 924446
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