Could you post the result of
pvscan
vgscan
lvscan
And also remove /backup entry in /etc/fstab, as brittonv mentioned.
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Can not remove second hard drive in Unix system!!!
Hi everyone,
My server is using Centos 4.5. I use 2 hard drive,one for main files and one for backup purpose. I mounted second hard drive as /backup. Now it is failed to i need to remove it. But seem when I remove the second hard drive, system fail to boot, below is error message
ERROR: /bin/lvm exited abnormally!(pid 562)
Activating logical volumes
Couldn't find device with uuid 'YSOJQS.......
Couldn't find all physical volumes for volume group VolGroup00
Volume group "VolGroup00" not found
ERROR: /bin/lvm exited abnormally!(pid 563)
Creating root device
Mounting root filesystem
moung: error 6 mouting ext3
mount: error 2 mouting none
Switching to new root
switchroot: mount failed: 22
Umount /initrd/dev failed: 22
Kernel panic - not syncing: Attempted to kill init!
Seem that some system files are on the second drive.
Here is the result of fdisk -l
Disk /dev/sda: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 1318 10482412+ 83 Linux
/dev/sda3 1319 2232 7341705 83 Linux
/dev/sda4 2233 30401 226267492+ 5 Extended
/dev/sda5 2233 2493 2096451 83 Linux
/dev/sda6 2494 30401 224170978+ 8e Linux LVM
Disk /dev/sdb: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 30099 241770186 83 Linux
/dev/sdb2 30100 30401 2425815 8e Linux LVM
Here is the result of pvdisplay /dev/sdb2
--- Physical volume ---
PV Name /dev/sdb2
VG Name VolGroup00
PV Size 2.31 GB / not usable 983.00 KB
Allocatable yes
PE Size (KByte) 32768
Total PE 74
Free PE 3
Allocated PE 71
PV UUID YJ0JQs-fwpf-FGbn-v2xF-01Xj
When i run vgreduce VolGroup00 /dev/sdb2,i got
Physical volume "/dev/sdb2" still in use
I run vgchange -a n VolGroup00
then got
Can't deactivate volume group "VolGroup00" with 2 open logical volume(s)
[root@vietnam1 /]# pvremove /dev/sdb2
Can't pvremove physical volume "/dev/sdb2" of volume group "VolGroup00" withou t -ff
Please help me on this issue.
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Answers
pvscan result
PV /dev/sdb2 VG VolGroup00 lvm2 [2.31 GB / 96.00 MB free]
PV /dev/sda6 VG VolGroup00 lvm2 [213.78 GB / 0 free]
Total: 2 [216.09 GB] / in use: 2 [216.09 GB] / in no VG: 0 [0 ]
vgscan result
Reading all physical volumes. This may take a while...
Found volume group "VolGroup00" using metadata type lvm2
lvscan result
ACTIVE '/dev/VolGroup00/LogVol00'
ACTIVE '/dev/VolGroup00/LogVol01'
I remove /backup entry in /etc/fstab and reboot the server sucessfully, sdb2 is a part of second hard drive so i can not the remove the hard drive.
it does not work either
[root@vietnam1 /]# pvremove -ff /dev/sdb2
Really WIPE LABELS from physical volume "/dev/sdb2" of volume group "VolGroup00" [y/n]? y
WARNING: Wiping physical volume label from /dev/sdb2 of volume group "VolGroup00"
Can't open /dev/sdb2 exclusively - not removing. Mounted filesystem?
Here is result for mount
/dev/mapper/VolGroup00-Log
none on /proc type proc (rw)
none on /sys type sysfs (rw)
none on /dev/pts type devpts (rw,gid=5,mode=620)
usbfs on /proc/bus/usb type usbfs (rw)
/dev/sda1 on /boot type ext3 (rw)
none on /dev/shm type tmpfs (rw,noexec,nosuid)
/dev/sda5 on /tmp type ext3 (rw,noexec,nosuid)
/dev/sda2 on /usr type ext3 (rw,usrquota)
/dev/sda3 on /var type ext3 (rw,usrquota)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
/tmp on /var/tmp type none (rw,noexec,nosuid,bind)
I am not sure which one is mounted on sdb2 so can not umount them.
here is the result of first 2 command
[root@vietnam1 /]# umount /dev/VolGroup00/LogVol01
umount: /dev/VolGroup00/LogVol01: not mounted
[root@vietnam1 /]# lvremove /dev/VolGroup00/LogVol01
Can't remove open logical volume "LogVol01"
[root@vietnam1 /]# vgreduce /dev/VolGroup00 /dev/sdb2
Physical volume "/dev/sdb2" still in use
Below is mount result
[root@vietnam1 /]# mount
/dev/mapper/VolGroup00-Log
none on /proc type proc (rw)
none on /sys type sysfs (rw)
none on /dev/pts type devpts (rw,gid=5,mode=620)
usbfs on /proc/bus/usb type usbfs (rw)
/dev/sda1 on /boot type ext3 (rw)
none on /dev/shm type tmpfs (rw,noexec,nosuid)
/dev/sda5 on /tmp type ext3 (rw,noexec,nosuid)
/dev/sda2 on /usr type ext3 (rw,usrquota)
/dev/sda3 on /var type ext3 (rw,usrquota)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
/tmp on /var/tmp type none (rw,noexec,nosuid,bind)
Please help,thanks
Here is etc/fstab content
# This file is edited by fstab-sync - see 'man fstab-sync' for details
/dev/VolGroup00/LogVol00 / ext3 defaults,usrquota 1 1
LABEL=/boot /boot ext3 defaults 1 2
none /dev/pts devpts gid=5,mode=620 0 0
none /dev/shm tmpfs defaults,nosuid,noexec,rw 0 0
none /proc proc defaults 0 0
none /sys sysfs defaults 0 0
LABEL=/tmp /tmp ext3 defaults 1 2
LABEL=/usr /usr ext3 defaults,usrquota 1 2
LABEL=/var /var ext3 defaults,usrquota 1 2
/dev/VolGroup00/LogVol01 swap swap defaults 0 0
/tmp /var/tmp ext3 defaults,bind,noauto 0 0
I think /dev/VolGroup00/LogVol01 swap swap defaults 0 0 is the reason why i can not remove second hard drive,it is used as swap?
after run swapoff i can run the command
lvremove /dev/VolGroup00/LogVol01
but still got error
vgreduce /dev/VolGroup00 /dev/sdb2
Physical volume "/dev/sdb2" still in use
fdisk -l result
[root@vietnam1 /]# fdisk -l
Disk /dev/sda: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 1318 10482412+ 83 Linux
/dev/sda3 1319 2232 7341705 83 Linux
/dev/sda4 2233 30401 226267492+ 5 Extended
/dev/sda5 2233 2493 2096451 83 Linux
/dev/sda6 2494 30401 224170978+ 8e Linux LVM
Disk /dev/sdb: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 30099 241770186 83 Linux
/dev/sdb2 30100 30401 2425815 8e Linux LVM
Can i now remove 2nd drive safely?
Post pvscan/lvscan results again, please. I think that LogVol00 uses a bit of space on /dev/sdb ...
pvscan result
PV /dev/sdb2 VG VolGroup00 lvm2 [2.31 GB / 96.00 MB free]
PV /dev/sda6 VG VolGroup00 lvm2 [213.78 GB / 0 free]
Total: 2 [216.09 GB] / in use: 2 [216.09 GB] / in no VG: 0 [0 ]
lvscan result
ACTIVE '/dev/VolGroup00/LogVol00'
ACTIVE '/dev/VolGroup00/LogVol01'
pvscan result
[root@vietnam1 /]# pvscan
PV /dev/sdb2 VG VolGroup00 lvm2 [2.31 GB / 2.03 GB free]
PV /dev/sda6 VG VolGroup00 lvm2 [213.78 GB / 0 free]
Total: 2 [216.09 GB] / in use: 2 [216.09 GB] / in no VG: 0 [0 ]
lvscan result
[root@vietnam1 /]# lvscan
ACTIVE '/dev/VolGroup00/LogVol00'
Seem lvscan result is different but pvscan is still the same,what should i do now?
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by: brittonvPosted on 2007-09-28 at 14:10:52ID: 19981804
Will it boot with the disk installed?
If so boot and edit your /etc/fstab file to remove the fault HD.