[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Re: [linux-lvm] vg disappeared after replacing disc in raid10



You were right,
the data has been overwritten.
It now reads thus (or rather, the first instance of human-readable volume group description reads thus; my old volume group description is still there, but further down...):

""""""""""""""""""""""""""""""""""""""""
vol0 {
id = "8kEHPL-yDuF-7ffg-GeGH-dEg6-D0Qn-lUrKoh"
seqno = 1
format = "lvm2" # informational
status = ["RESIZEABLE", "READ", "WRITE"]
flags = []
extent_size = 8192
max_lv = 0
max_pv = 0
metadata_copies = 0

physical_volumes {

pv0 {
id = "WFo1On-anFb-2av8-DuRq-vKee-nJEt-ZLnu26"
device = "/dev/md127"

status = ["ALLOCATABLE"]
flags = []
dev_size = 5820316928
pe_start = 384
pe_count = 710487
}
}

}
# Generated by LVM2 version 2.02.95(2) (2012-03-06): Sun Mar 24 23:39:50 2013

contents = "Text Format Volume Group"
version = 1

description = ""

creation_host = "Microknoppix"    # Linux Microknoppix 3.6.11 #12 SMP PREEMPT Thu Dec 20 04:04:10 CET 2012 i686
creation_time = 1364168390    # Sun Mar 24 23:39:50 2013
"""""""""""""""""""""""""""""""""""""""""'''

No wonder I do not see any logical volumes (well, I did not see any logical volumes before creating the volume neither...)

So what should I do?

lvs does not see anything, of course.

I could recreate the physical volume using

sudo pvcreate --uuid WFo1On-anFb-2av8-DuRq-vKee-nJEt-ZLnu26 --restorefile vol0.t
xt /dev/md127

(using my old volume group description in vol0.txt, of course).

Is this what I should do? Or rather remove the physical volume first?



On Mon, Mar 25, 2013 at 9:30 PM, Stuart D Gathman <stuart bmsi com> wrote:
Long ago, Nostradamus foresaw that on 03/25/2013 04:46 PM, Björn
Nadrowski would write:
> Recreation of the volume group seemed  a good idea as I only had one volume group on the pv and therefore I did not see how this could have destroyed anything.
> The (human-readable) data at the beginning of the device /dev/md127 is still there and does display the same information. Please see my posting
Recreating the vg overwrites the human-readable data at the beginning of
the device.  You claim that it is "still there" and is the "same
information".  But this cannot be true because originally that
information had your LV data, and now (apparently) it does not.  Do you
see your LVs when looking at the vg metadata with an editor??   What do
you mean by "displays the same information"?  Does lvs list your LVs?

_______________________________________________
linux-lvm mailing list
linux-lvm redhat com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/


[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]