[linux-lvm] How to confuse lvm using devfs

[Heinz J . Mauelshagen]

Koos,

that's a know constraint in LVM1.

In recent LVM1 versions, there's support for environment variable LVM_DEV_REFIX.
Still needs some work to anable arbitrary devfs mount points though.

LVM2 is fully configurable already ITR.

Regards,
Heinz    -- The LVM Guy --


On Mon, Apr 29, 2002 at 11:22:54AM +0200, Koos van den Hout wrote:
> 
> It seems the lvm tools get confused when there is devfs compiled into the
> kernel but it's not mounted at /dev. Twice I had
> 
> lvcreate -l 1024 vghm -n home
> 
> fail on me with an error about /dev/vghm/home being inacessible. That's
> simply because it was not there.
> 
> When I created /dev/vghm/home with the same data as /devices/vghm/home
> it wasn't available right away (according to vgdisplay, the extents
> were allocated, but lvdisplay did not show the logical volume). When I reran
> vgscan (and maybe rebooted in the process, I have rebooted lots of times)
> it showed up and worked. The device is formatted with reiserfs now and
> mounted.
> 
> Now, when I try to display the volume info:
> 
> root at NEWgosper:~# lvdisplay /devices/vghm/home 
> lvdisplay -- invalid logical volume name "/devices/vghm/home"
> 
> 
> root at NEWgosper:~# lvdisplay /dev/vghm/home 
> --- Logical volume ---
> LV Name                /dev/vghm/home
> VG Name                vghm
> LV Write Access        read/write
> LV Status              available
> LV #                   1
> # open                 1
> LV Size                4.00 GB
> Current LE             1024
> Allocated LE           1024
> Allocation             next free
> Read ahead sectors     120
> Block device           58:1
> 
> root at NEWgosper:~# ls -l /dev/vghm/home /devices/vghm/home
> brw-r-----    1 root     root      58,   1 Apr 29 01:23 /dev/vghm/home
> brw-r-----    1 root     root      58,   1 Jan  1  1970 /devices/vghm/home
> 
> Kernel 2.4.18, devfs compiled in but mounted on /devices and not on /dev
> (just testing with devfs).
> 
> Logical Volume Manager 1.0
> Heinz Mauelshagen, Sistina Software  14/08/2001 (IOP 10)
> 
>                                      Koos van den Hout
> 
> -- 
> Koos van den Hout,           PGP keyid RSA/1024 0xCA845CB5 via keyservers
> koos at kzdoos.xs4all.nl        or DSS/1024 0xF0D7C263                        -?)
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> 
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*** 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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