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[linux-lvm] vgcreate blackhole



% uname -a
Linux linux1.localdomain 2.4.3-20mdk #1 Sun Apr 15 23:03:10 CEST 2001 i686 Unknown
(Mandrake Distribution 8.0)

% cat /proc/lvm/global
LVM module version 0.9.1_beta2 (18/01/2001)
<see rest of output below>

% vgcreate --version
vgcreate: unrecognized option `--version'
Logical Volume Manager 0.9
Heinz Mauelshagen, Sistina Software  13/11/2000  (IOP 10)
...

Summary: VGCREATE finishes nicely (verbose output below).
        But a VGSCAN immediately after vgcreate , shows nothing changed.

A little longer Summary of the problem:
======================================
Have had LVM up for a little while now.
Wanted to add LVM over RAID1 (ref: my previous email help).
Created two devices md0 and md1 (see the raidtab below).
Had the same identical problem with md0.  After reading
the linux-lvm list, I tried it with md1 only, butno difference.
So, I am writing this email re: the md1 experience only.

Note: All the lvm commands were run ONLY in linux-single-user mode.
    But some of the LVM volumes were mounted while running the
    cgvreate, pvcreate commands.   From my prior experience
    and by the man pages, it doesn't matter, but then....

DETAILS of the PROBLEM
======================
Run the command
    % vgcreate -v MKP4 /dev/md1
(See detailed output below).

vgscan does not show MKP4.  PVSCAN shows unknown volume.  see listing below.

After that any attempt to modify the LVM setup (eg: vgextend, pvcreate, etc...) give the following error.  Ofcourse, pvscan and vgscan do not give errors.

    pvcreate -- ERROR: VGDA in kernel and lvmtab are NOT consistent; please run vgscan

Rebooting does not help.
Deleting the /etc/lvmtab and /etc/lvmtab.d didn't make any difference.
I understand that the /etc/lvmconf directory is more of a backup.
And that directory has a MKP4.conf in it! (I guess vgcreate
does say that its doing so).

To see if md0 and md1 are functionally ok, I did a pvcreate -ff
to remove any links between the raid1 devices and any known or unknown
VGs.  Then I did a mke2fs /dev/md0 and /dev/md1 and mounted them and
used them just fine as regular linux-e2fs file systems.

The LVM came with the version Mandrake 8.0 distribution.
I used the LV modules out of the 'box'.
Just in case it makes a difference, I found this about the gcc that came
with the 8.0 distribution of Mandrake (after having read some comments
about using gcc versions > 2.95.2)
% gcc --version
2.96

Also, noted that /etc/rc.d/rc.sysinit loads up LVM before it
loads up the raid module and devices.  So, I moved the script lines
to load up LVM AFTER raid.  No difference at all.   If any difference
it should be if I had no problems with the vgcreate...

========================================
% vgcreate -v MKP4 /dev/md1
vgcreate -- checking volume group name
vgcreate -- checking volume group directory existence
vgcreate -- locking logical volume manager
vgcreate -- checking volume group "MKP4" existence
vgcreate -- counting all existing volume groups
vgcreate -- reading all physical volume data from disks
vgcreate -- checking if all given physical volumes in command line are new
vgcreate -- checking physical volumes name "/dev/md1"
vgcreate -- checking physical volume "/dev/md1"
vgcreate -- getting size of physical volume "/dev/md1"
vgcreate -- size of physical volume "/dev/md1"  is 4194048 sectors
vgcreate -- checking for new physical volume "/dev/md1"
vgcreate -- checking for identical physical volumes on command line
vgcreate -- 1 physical volume will be inserted into volume group "MKP4"
vgcreate -- checking command line arguments
vgcreate -- INFO: maximum of 256 physical volumes
vgcreate -- INFO: maximum of 256 logical volumes
vgcreate -- setting up volume data for creation
vgcreate -- INFO: using default physical extent size 4 MB
vgcreate -- INFO: maximum logical volume size is 255.99 Gigabyte
vgcreate -- storing volume group data on disk(s)
vgcreate -- removing any invalid special files of volume group "MKP4"
vgcreate -- creating volume group directory /dev/MKP4
vgcreate -- creating VGDA for volume group "MKP4" in kernel
vgcreate -- inserting volume group "MKP4" into "/etc/lvmtab"
vgcreate -- checking volume group name "MKP4"
vgcreate -- checking volume group consistency of "MKP4"
vgcreate -- checking existence of "/etc/lvmtab.d"
vgcreate -- storing volume group data of "MKP4" in "/etc/lvmtab.d/MKP4.tmp"
vgcreate -- storing physical volume data of "MKP4" in "/etc/lvmtab.d/MKP4.tmp"
vgcreate -- storing logical volume data of volume group "MKP4" in "/etc/lvmtab.d/MKP4.tmp"
vgcreate -- renaming "/etc/lvmtab.d/MKP4.tmp" to "/etc/lvmtab.d/MKP4"
vgcreate -- doing automatic backup of volume group "MKP4"
vgcreate -- checking volume group name "MKP4"
vgcreate -- checking volume group consistency of "MKP4"
vgcreate -- checking existence of "/etc/lvmconf"
vgcreate -- storing volume group data of "MKP4" in "/etc/lvmconf/MKP4.conf.tmp"
vgcreate -- storing physical volume data of "MKP4" in "/etc/lvmconf/MKP4.conf.tmp"
vgcreate -- storing logical volume data of volume group "MKP4" in "/etc/lvmconf/MKP4.conf.tmp"
vgcreate -- checking existence of "/etc/lvmconf/MKP4.conf.tmp"
vgcreate -- checking existence of "/etc/lvmconf/MKP4.conf"
vgcreate -- renaming "/etc/lvmconf/MKP4.conf.tmp" to "/etc/lvmconf/MKP4.conf"
vgcreate -- unlocking logical volume manager
vgcreate -- volume group "MKP4" successfully created and activated


% pvscan
pvscan -- reading all physical volumes (this may take a while...)
pvscan -- inactive PV "/dev/md0"   is in no VG  [2 GB]
pvscan -- ACTIVE   PV "/dev/md1"    is associated to an unknown VG (run vgscan)
pvscan -- ACTIVE   PV "/dev/hda7"  of VG "migataa"      [2 GB / 0 free]
pvscan -- ACTIVE   PV "/dev/hda8"  of VG "migataa"      [2 GB / 0 free]
pvscan -- ACTIVE   PV "/dev/hda10" of VG "maakompa.old" [2 GB / 0 free]
pvscan -- ACTIVE   PV "/dev/hda11" of VG "maakompa.old" [2 GB / 0 free]
pvscan -- inactive PV "/dev/hda12" is in no VG  [3.08 GB]
pvscan -- inactive PV "/dev/hdc7"  is in no VG  [2.05 GB]
pvscan -- ACTIVE   PV "/dev/hdc8"  of VG "NFS"          [2.04 GB / 0 free]
pvscan -- inactive PV "/dev/hdc10" is in no VG  [2.05 GB]
pvscan -- ACTIVE   PV "/dev/hdc11" of VG "DBMS"         [2.04 GB / 0 free]
pvscan -- ACTIVE   PV "/dev/hdc12" of VG "WEB"          [2.04 GB / 0 free]
pvscan -- ACTIVE   PV "/dev/hdc14" of VG "AUDIO"        [3 GB / 4 MB free]
pvscan -- total: 13 [28.32 GB] / in use: 9 [19.15 GB] / in no VG: 4 [9.18 GB]

% vgscan
vgscan -- reading all physical volumes (this may take a while...)
vgscan -- found active volume group "migataa"
vgscan -- found active volume group "maakompa.old"
vgscan -- found active volume group "NFS"
vgscan -- found active volume group "DBMS"
vgscan -- found active volume group "WEB"
vgscan -- found active volume group "AUDIO"
vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
vgscan -- WARNING: you may not have an actual VGDA backup of your volume groups


=====================================

lvmdiskscan -- reading all disks / partitions (this may take a while...)
lvmdiskscan -- /dev/md0   [          2 GB] free multiple device
lvmdiskscan -- /dev/md1   [          2 GB] free multiple device
lvmdiskscan -- /dev/hda1  [          3 GB] Primary  LINUX native partition [0x83]
lvmdiskscan -- /dev/hda2  [      16.08 GB] DOS extended partition [0x5]
lvmdiskscan -- /dev/hda5  [    1023.72 MB] Extended LINUX swap partition [0x82]
lvmdiskscan -- /dev/hda6  [          2 GB] Extended  [0xFD]
lvmdiskscan -- /dev/hda7  [          2 GB] Extended LVM partition [0x8E]
lvmdiskscan -- /dev/hda8  [          2 GB] Extended LVM partition [0x8E]
lvmdiskscan -- /dev/hda9  [          2 GB] Extended  [0xFD]
lvmdiskscan -- /dev/hda10 [          2 GB] Extended LVM partition [0x8E]
lvmdiskscan -- /dev/hda11 [          2 GB] Extended LVM partition [0x8E]
lvmdiskscan -- /dev/hda12 [       3.08 GB] Extended LVM partition [0x8E]
lvmdiskscan -- /dev/hdc1  [          8 GB] Primary  LVM partition [0x8E]
lvmdiskscan -- /dev/hdc2  [      20.63 GB] DOS extended partition [0x5]
lvmdiskscan -- /dev/hdc5  [       2.05 GB] Extended LINUX native partition [0x83]
lvmdiskscan -- /dev/hdc6  [          2 GB] Extended  [0xFD]
lvmdiskscan -- /dev/hdc7  [       2.05 GB] Extended LVM partition [0x8E]
lvmdiskscan -- /dev/hdc8  [       2.05 GB] Extended LVM partition [0x8E]
lvmdiskscan -- /dev/hdc9  [          2 GB] Extended  [0xFD]
lvmdiskscan -- /dev/hdc10 [       2.05 GB] Extended LVM partition [0x8E]
lvmdiskscan -- /dev/hdc11 [       2.05 GB] Extended LVM partition [0x8E]
lvmdiskscan -- /dev/hdc12 [       2.05 GB] Extended LVM partition [0x8E]
lvmdiskscan -- /dev/hdc13 [       1.24 GB] Extended LINUX swap partition [0x82]
lvmdiskscan -- /dev/hdc14 [       3.01 GB] Extended LVM partition [0x8E]
lvmdiskscan -- 2 disks
lvmdiskscan -- 0 whole disks
lvmdiskscan -- 0 loop devices
lvmdiskscan -- 2 multiple devices
lvmdiskscan -- 0 network block devices
lvmdiskscan -- 22 partitions
lvmdiskscan -- 12 LVM physical volume partitions

=======================================

(Cut n pasted via Win98 telnet window).
% cat /etc/lvmconf/MKP4.conf
´       MKP4?TSbïà]½°?³4ÆÈ*n0¾?6«næ!ì ÿPÑ<?ieT9rIw
AlvcgJKpcvjcKLiwzfUn0d2j8¼P Ø!@È!@ üÿ¿Ø!@
¿ ä#@ì1 Ø!@?[ ?ÿwK+@Ðüÿ¿ Z@%?T Ø!@üG Ø!@`Ó@,# X$@V T@@Z 7?
?üÿ¿`Ó ?[@$ Ø!@
¿ °üÿ¿ÎÒ@ÀÀ7?¼P@,@,ýÿ¿?Y Èüÿ¿HM???HIä</dev/md1MKP4linux1.localdoma
in1002404658   ÿ? ÿ8¦mV8n8epwTZdxyRRHZw4n2t2c8u2uyiJKü00000000000
0000000000000000000000000000000000000000
0000000000000000000000000000000000000000
0000000000000000000000000000000000000000
0000000000000000000000000000000000000000
0000000000000000000000000000000000000000
0000000000000000000000000000000000000000
00000

======================================

% cat /proc/lvm/global
LVM module version 0.9.1_beta2 (18/01/2001)

Total:  7 VGs  9 PVs  6 LVs (6 LVs open 6 times)

Global: 95531 bytes malloced   IOP version: 10   0:15:46 active

VG:  migataa  [2 PV, 1 LV/1 open]  PE Size: 4096 KB
  Usage [KB/PE]: 4186112 /1022 total  4186112 /1022 used  0 /0 free
  PVs: [AA] hda7                   2093056 /511      2093056 /511            0 /0
       [AA] hda8                   2093056 /511      2093056 /511            0 /0
    LV:  [AWDL  ] 1                          4186112 /1022     1x open

VG:  maakompa.old  [2 PV, 1 LV/1 open]  PE Size: 4096 KB
  Usage [KB/PE]: 4186112 /1022 total  4186112 /1022 used  0 /0 free
  PVs: [AA] hda10                  2093056 /511      2093056 /511            0 /0
       [AA] hda11                  2093056 /511      2093056 /511            0 /0
    LV:  [AWDL  ] 1                          4186112 /1022     1x open

VG:  NFS  [1 PV, 1 LV/1 open]  PE Size: 4096 KB
  Usage [KB/PE]: 2142208 /523 total  2142208 /523 used  0 /0 free
  PV:  [AA] hdc8                   2142208 /523      2142208 /523            0 /0
    LV:  [AWDL  ] 1                          2142208 /523      1x open

VG:  DBMS  [1 PV, 1 LV/1 open]  PE Size: 4096 KB
  Usage [KB/PE]: 2142208 /523 total  2142208 /523 used  0 /0 free
  PV:  [AA] hdc11                  2142208 /523      2142208 /523            0 /0
    LV:  [AWDL  ] 1                          2142208 /523      1x open

VG:  WEB  [1 PV, 1 LV/1 open]  PE Size: 4096 KB
  Usage [KB/PE]: 2142208 /523 total  2142208 /523 used  0 /0 free
  PV:  [AA] hdc12                  2142208 /523      2142208 /523            0 /0
    LV:  [AWDL  ] 1                          2142208 /523      1x open

VG:  AUDIO  [1 PV, 1 LV/1 open]  PE Size: 4096 KB
  Usage [KB/PE]: 3149824 /769 total  3145728 /768 used  4096 /1 free
  PV:  [AA] hdc14                  3149824 /769      3145728 /768         4096 /1
    LV:  [AWDL  ] 1                          3145728 /768      1x open

VG:  MKP4  [1 PV, 0 LV/0 open]  PE Size: 4096 KB
  Usage [KB/PE]: 2093056 /511 total  0 /0 used  2093056 /511 free
  PV:  [AA] md1                    2093056 /511            0 /0        2093056 /511
    LVs: none

=====================================

% cat /proc/partitions
major minor  #blocks  name     rio rmerge rsect ruse wio wmerge wsect wuse running use aveq

   9     0    2097024 md0 0 0 0 0 0 0 0 0 0 0 0
   9     1    2097024 md1 0 0 0 0 0 0 0 0 0 0 0
  58     0    4186112 lvma 0 0 0 0 0 0 0 0 0 0 0
  58     1    4186112 lvmb 0 0 0 0 0 0 0 0 0 0 0
  58     2    2142208 lvmc 0 0 0 0 0 0 0 0 0 0 0
  58     3    2142208 lvmd 0 0 0 0 0 0 0 0 0 0 0
  58     4    2142208 lvme 0 0 0 0 0 0 0 0 0 0 0
  58     5    3145728 lvmf 0 0 0 0 0 0 0 0 0 0 0
   3     0   20010312 hda 1390 3000 20768 15590 529 1540 15918 11310 0 15500 26900
   3     1    3145432 hda1 733 1240 15778 6810 503 1417 15432 10780 0 6700 17590
   3     2          1 hda2 9 0 18 160 0 0 0 0 0 160 160
   3     5    1048288 hda5 2 0 16 10 0 0 0 0 0 10 10
   3     6    2097112 hda6 5 0 34 430 1 0 8 0 0 430 430
   3     7    2097112 hda7 101 875 2030 480 18 9 224 460 0 670 940
   3     8    2097112 hda8 17 5 44 220 0 0 0 0 0 220 220
   3     9    2097112 hda9 17 0 58 280 6 114 246 20 0 300 300
   3    10    2097112 hda10 87 875 1924 640 0 0 0 0 0 640 640
   3    11    2097112 hda11 21 5 70 250 1 0 8 50 0 300 300
   3    12    3233632 hda12 11 0 22 200 0 0 0 0 0 200 200
  22     0   30016224 hdc 971 3525 9346 4700 30 124 518 90 0 4730 4790
  22     1    8388544 hdc1 9 0 18 30 0 0 0 0 0 30 30
  22     2          1 hdc2 9 0 18 220 0 0 0 0 0 220 220
  22     5    2146000 hdc5 39 0 300 320 19 10 232 30 0 330 350
  22     6    2097112 hdc6 34 0 92 300 1 0 8 0 0 300 300
  22     7    2146000 hdc7 11 0 22 160 0 0 0 0 0 160 160
  22     8    2146000 hdc8 91 880 1960 370 1 0 8 10 0 380 380
  22     9    2097112 hdc9 13 0 50 180 6 114 246 20 0 200 200
  22    10    2146000 hdc10 11 0 22 140 0 0 0 0 0 140 140
  22    11    2146000 hdc11 91 880 1960 300 1 0 8 10 0 310 310
  22    12    2146000 hdc12 91 880 1960 270 1 0 8 10 0 280 280
  22    13    1305328 hdc13 2 0 16 30 0 0 0 0 0 30 30
  22    14    3154000 hdc14 91 885 1970 290 1 0 8 10 0 300 300

=====================================

% cat /etc/raidtab
raiddev /dev/md0
        raid-level      1
        nr-raid-disks   2
        nr-spare-disks  0
        chunk-size      4
        persistent-superblock 1
        device          /dev/hda6
        raid-disk       0
        device          /dev/hdc6
        raid-disk       1

raiddev /dev/md1
        raid-level      1
        nr-raid-disks   2
        nr-spare-disks  0
        chunk-size      4
        persistent-superblock 1
        device          /dev/hda9
        raid-disk       0
        device          /dev/hdc9
        raid-disk       1


% cat /proc/mdstat
Personalities : [raid1]
read_ahead 1024 sectors
md1 : active raid1 hdc9[1] hda9[0]
      2097024 blocks [2/2] [UU]

md0 : active raid1 hdc6[1] hda6[0]
      2097024 blocks [2/2] [UU]

unused devices: <none>

=====================================

% fdisk -l /dev/hda
Disk /dev/hda: 16 heads, 63 sectors, 39703 cylinders
Units = cylinders of 1008 * 512 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/hda1   *         1      6241   3145432+  83  Linux
/dev/hda2          6242     39703  16864848    5  Extended
/dev/hda5          6242      8321   1048288+  82  Linux swap
/dev/hda6          8322     12482   2097112+  fd  Linux raid autodetect
/dev/hda7         12483     16643   2097112+  8e  Linux LVM
/dev/hda8         16644     20804   2097112+  8e  Linux LVM
/dev/hda9         20805     24965   2097112+  fd  Linux raid autodetect
/dev/hda10        24966     29126   2097112+  8e  Linux LVM
/dev/hda11        29127     33287   2097112+  8e  Linux LVM
/dev/hda12        33288     39703   3233632+  8e  Linux LVM

=====================================

% fdisk -l /dev/hdc
Disk /dev/hdc: 16 heads, 63 sectors, 59556 cylinders
Units = cylinders of 1008 * 512 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/hdc1   *         1     16644   8388544+  8e  Linux LVM
/dev/hdc2         16645     59556  21627648    5  Extended
/dev/hdc5         16645     20902   2146000+  83  Linux
/dev/hdc6         20903     25063   2097112+  fd  Linux raid autodetect
/dev/hdc7         25161     29418   2146000+  8e  Linux LVM
/dev/hdc8         29419     33676   2146000+  8e  Linux LVM
/dev/hdc9         33677     37837   2097112+  fd  Linux raid autodetect
/dev/hdc10        37935     42192   2146000+  8e  Linux LVM
/dev/hdc11        42193     46450   2146000+  8e  Linux LVM
/dev/hdc12        46451     50708   2146000+  8e  Linux LVM
/dev/hdc13        50709     53298   1305328+  82  Linux swap
/dev/hdc14        53299     59556   3154000+  8e  Linux LVM

=====================================

[EoInfo]





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