[linux-lvm] unable to create device for volume group

[CoolCold]

On Thu, Feb 3, 2011 at 5:57 PM, aneesh vs <mailtoaneeshvs at gmail.com> wrote:
> What if you simply run lvcreate on vg ? May be nodes are getting created
> after atleast one lV is active?
Yes, that was night blunting , and after send email button was
pressed, i'v realized that until lv is created, there won't be any
block devices, so no /dev/xxx entries ;) So problem resolved,
everything is ok now, thanks!


>
> On Fri, Jan 28, 2011 at 4:20 AM, CoolCold <coolthecold at gmail.com> wrote:
>>
>> Hello!
>> I've just created new pv & vg, wanted to create lv over it, but
>> suddenly found there is nothing in /dev or /sys/block or
>> /sys/class/block related to that vg
>>
>> a bit info:
>> I already have another pvs & volume group (inktomia) & lv, working nice:
>> root at delta:~# vgscan
>>  Reading all physical volumes.  This may take a while...
>>  Found volume group "vgsphinx" using metadata type lvm2
>>  Found volume group "inktomia" using metadata type lvm2
>>
>> new vg is "vgsphinx".
>>
>> root at delta:~# vgdisplay vgsphinx
>>  --- Volume group ---
>>  VG Name               vgsphinx
>>  System ID
>>  Format                lvm2
>>  Metadata Areas        1
>>  Metadata Sequence No  1
>>  VG Access             read/write
>>  VG Status             resizable
>>  MAX LV                0
>>  Cur LV                0
>>  Open LV               0
>>  Max PV                0
>>  Cur PV                1
>>  Act PV                1
>>  VG Size               111.79 GB
>>  PE Size               4.00 MB
>>  Total PE              28618
>>  Alloc PE / Size       0 / 0
>>  Free  PE / Size       28618 / 111.79 GB
>>  VG UUID               9TSHZX-DbFk-2kSl-RI6I-XYOH-gMho-eI2wsZ
>>
>> filter looks ok too:
>> root at delta:~# egrep '^[[:space:]]+filter' /etc/lvm/lvm.conf
>>    filter = [ "a/.*/" ]
>>
>> nothing interesting in dmesg.
>>
>>
>> steps i did when trying to resolve issue:
>> root at delta:~# vgscan
>>  Reading all physical volumes.  This may take a while...
>>  Found volume group "vgsphinx" using metadata type lvm2
>>  Found volume group "inktomia" using metadata type lvm2
>> root at delta:~# vgchange -a y
>>  0 logical volume(s) in volume group "vgsphinx" now active
>>  1 logical volume(s) in volume group "inktomia" now active
>> root at delta:~# vgmknodes -v
>>    Finding all logical volumes
>>
>> root at delta:~# ls -la /sys/block/
>> total 0
>> drwxr-xr-x  2 root root 0 2011-01-27 23:34 .
>> drwxr-xr-x 13 root root 0 2011-01-27 23:33 ..
>> lrwxrwxrwx  1 root root 0 2011-01-28 01:12 dm-0 ->
>> ../devices/virtual/block/dm-0
>> lrwxrwxrwx  1 root root 0 2011-01-28 01:12 loop0 ->
>> ../devices/virtual/block/loop0
>> lrwxrwxrwx  1 root root 0 2011-01-28 01:12 loop1 ->
>> ../devices/virtual/block/loop1
>> lrwxrwxrwx  1 root root 0 2011-01-28 01:12 loop2 ->
>> ../devices/virtual/block/loop2
>> lrwxrwxrwx  1 root root 0 2011-01-28 01:12 loop3 ->
>> ../devices/virtual/block/loop3
>> lrwxrwxrwx  1 root root 0 2011-01-28 01:12 loop4 ->
>> ../devices/virtual/block/loop4
>> lrwxrwxrwx  1 root root 0 2011-01-28 01:12 loop5 ->
>> ../devices/virtual/block/loop5
>> lrwxrwxrwx  1 root root 0 2011-01-28 01:12 loop6 ->
>> ../devices/virtual/block/loop6
>> lrwxrwxrwx  1 root root 0 2011-01-28 01:12 loop7 ->
>> ../devices/virtual/block/loop7
>> lrwxrwxrwx  1 root root 0 2011-01-27 23:33 md0 ->
>> ../devices/virtual/block/md0
>> lrwxrwxrwx  1 root root 0 2011-01-27 23:33 md1 ->
>> ../devices/virtual/block/md1
>> lrwxrwxrwx  1 root root 0 2011-01-27 23:33 md2 ->
>> ../devices/virtual/block/md2
>> lrwxrwxrwx  1 root root 0 2011-01-27 23:33 md3 ->
>> ../devices/virtual/block/md3
>> lrwxrwxrwx  1 root root 0 2011-01-28 01:12 sda ->
>> ../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda
>> lrwxrwxrwx  1 root root 0 2011-01-28 01:12 sdb ->
>> ../devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sdb
>> lrwxrwxrwx  1 root root 0 2011-01-28 00:09 sdc ->
>> ../devices/pci0000:00/0000:00:1f.2/host5/target5:0:0/5:0:0:0/block/sdc
>>
>> so, /devices/virtual/block/dm-0 is from vg "inktomia", and there is no
>> new vg here
>>
>> system info: debian lenny with 2.6.32 kernel from backports:
>> root at delta:~# dpkg -p lvm2|grep Version
>> Version: 2.02.39-7
>> root at delta:~# cat /proc/version
>> Linux version 2.6.32-bpo.5-amd64 (Debian 2.6.32-30~bpo50+1)
>> (norbert at tretkowski.de) (gcc version 4.3.2 (Debian 4.3.2-1.1) ) #1 SMP
>> Mon Jan 17 18:24:45 UTC 2011
>>
>>
>> I guess i'm missing something, please point me.
>>
>> P.S. I'm not on list, so please CC me.
>>
>> --
>> Best regards,
>> [COOLCOLD-RIPN]
>>
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>> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>
>



-- 
Best regards,
[COOLCOLD-RIPN]