[linux-lvm] vgcreate blackhole
Uday Bhaskar Sarma Seetamraju
sarma at bellatlantic.net
Tue Oct 9 00:10:03 UTC 2001
% 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°Ž³4ÆÈ*n0¾•6«næ!ì ÿPÑ<ƒieT9rIw
AlvcgJKpcvjcKLiwzfUn0d2j8¼P@Ø!@È!@ üÿ¿Ø!@
¿@ä#@ì1@Ø!@”[@ŽÿwK+@Ðüÿ¿@Z@%‰T@Ø!@üG@Ø!@`Ó@,#@X$@V@T@@Z@7‰
üÿ¿`Ó@”[@$@Ø!@
¿@°üÿ¿ÎÒ@ÀÀ7‰¼P@, @,ýÿ¿„Y@Èüÿ¿HM€€šHIä
</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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