[linux-lvm] LVM Confusion
Adam Carheden
carheden at cira.colostate.edu
Mon Jan 30 21:34:39 UTC 2006
Forgive me if you said you did this somewhere in the post, but did you
use xfs_growfs to expand the size of the filesystem after you expanded
the size of the logical volume?
--
Adam Carheden
Linux Systems Administrator
970-491-8956 (o)
970-556-2914 (c)
tufkal wrote:
> This is kind of a long story but I will try to keep it simple. I have a
> linux file/web/mythtv/blah server that I run at my business. I recently
> added a 120GB and a 80GB drive to the machine. Here was the setup prior
> to that.
>
> 120GB Seagate
> -9GB / ext3
> -1GB Swap
> -110GB lvmhome xfs
>
> 120GB Seagate
> -120GB lvmhome xfs
>
>
> The 2 lvm partitions were used together as a ~220GB /home partition, and
> everything worked well. Then I decided to add the 2 new drives. The
> geometry now looks like this
>
> 120GB Seagate
> -9GB / ext3
> -1GB Swap
> -110GB lvmhome xfs
>
> 120GB Seagate
> -120GB lvmhome xfs
>
> 120GB Seagate
> -80GB lvmhome xfs
> -40GB /home/me linuxraid
>
> 80GB Seagate
> -40GB lvmhome xfs
> -40GB /home/me linuxraid
>
> I setup 40GB on each new drive apart in a raid1 mirror using mdadm.
> Then with the 120GB of new LVM space due to me, I tried to add it to my
> LVM home. I am unable to get the space. Here are the outputs of a few
> commands for some help.
>
> tufkal at tux:/home$ sudo lvm lvscan
> Password:
> ACTIVE '/dev/lvmhome/home' [325.82 GB] inherit
> tufkal at tux:/home$ sudo lvm pvscan
> PV /dev/hdb5 VG lvmhome lvm2 [107.39 GB / 0 free]
> PV /dev/hdc5 VG lvmhome lvm2 [ 110.23 GB / 0 free]
> PV /dev/sdb5 VG lvmhome lvm2 [35.46 GB / 0 free]
> PV /dev/sda5 VG lvmhome lvm2 [72.73 GB / 0 free]
> Total: 4 [325.82 GB] / in use: 4 [325.82 GB] / in no VG: 0 [0 ]
> tufkal at tux :/home$ sudo lvm vgscan
> Reading all physical volumes. This may take a while...
> Found volume group "lvmhome" using metadata type lvm2
> tufkal at tux:/home$
>
> According to those, everything looks great! I should have 325GB of space!
>
> tufkal at tux:/home$ cat /etc/fstab | grep lvm
> /dev/mapper/lvmhome-home /home xfs
> defaults 0 2
>
> And my /home is mounted on my lvm.....
>
> tufkal at tux:~$ df -h
> Filesystem Size Used Avail Use% Mounted on
> /dev/hdb1 4.4G 3.0G 1.2G 72% /
> tmpfs 253M 0 253M 0% /dev/shm
> tmpfs 253M 13M 240M 5%
> /lib/modules/2.6.12-10-386/volatile
> /dev/mapper/lvmhome-home 218G 197G 22G 91% /home
> /dev/md0 39G 29G 7.7G 80% /home/tufkal
>
> BWAH? Why do I only have 220GB of space? I run out of space almost
> nightly when MythTV starts transcoding the day's recordings. I gave up
> trying to figure out what I did wrong and I ask of you.
>
> More random command line pastes in case they help.
>
>
> tufkal at tux:~$ sudo lvm vgs
> Password:
> VG #PV #LV #SN Attr VSize VFree
> lvmhome 4 1 0 wz--n 325.82G 0
> tufkal at tux:~$ sudo lvm pvs
> PV VG Fmt Attr PSize PFree
> /dev/hdb5 lvmhome lvm2 a- 107.39G 0
> /dev/hdc5 lvmhome lvm2 a- 110.23G 0
> /dev/sda5 lvmhome lvm2 a- 72.73G 0
> /dev/sdb5 lvmhome lvm2 a- 35.46G 0
> tufkal at tux:~$ sudo lvm lvs
> LV VG Attr LSize Origin Snap% Move Copy%
> home lvmhome -wi-ao 325.82G
>
>
> tufkal at tux:~$ sudo lvm vgdisplay
> --- Volume group ---
> VG Name lvmhome
> System ID
> Format lvm2
> Metadata Areas 4
> Metadata Sequence No 96
> VG Access read/write
> VG Status resizable
> MAX LV 0
> Cur LV 1
> Open LV 1
> Max PV 0
> Cur PV 4
> Act PV 4
> VG Size 325.82 GB
> PE Size 4.00 MB
> Total PE 83409
> Alloc PE / Size 83409 / 325.82 GB
> Free PE / Size 0 / 0
> VG UUID 8BCR28-5oEl-heGV-97YY-k6Dy-gzaO-QdZcML
>
> tufkal at tux:~$ sudo lvm pvdisplay
> --- Physical volume ---
> PV Name /dev/hdb5
> VG Name lvmhome
> PV Size 107.39 GB / not usable 0
> Allocatable yes (but full)
> PE Size (KByte) 4096
> Total PE 27493
> Free PE 0
> Allocated PE 27493
> PV UUID DIuF4I-JfQH-w1nB-dJlM-0zef-R9An-MWxkLe
>
> --- Physical volume ---
> PV Name /dev/hdc5
> VG Name lvmhome
> PV Size 110.23 GB / not usable 0
> Allocatable yes (but full)
> PE Size (KByte) 4096
> Total PE 28219
> Free PE 0
> Allocated PE 28219
> PV UUID A3uL70-LwK6-61Vx-DoGj-8C7v-Ml7E-9JnWtM
>
> --- Physical volume ---
> PV Name /dev/sdb5
> VG Name lvmhome
> PV Size 35.46 GB / not usable 0
> Allocatable yes (but full)
> PE Size (KByte) 4096
> Total PE 9079
> Free PE 0
> Allocated PE 9079
> PV UUID yo14mv-oyRd-Up5z-DBj2-lEPO-jACe-su53bV
>
> --- Physical volume ---
> PV Name /dev/sda5
> VG Name lvmhome
> PV Size 72.73 GB / not usable 0
> Allocatable yes (but full)
> PE Size (KByte) 4096
> Total PE 18618
> Free PE 0
> Allocated PE 18618
> PV UUID sT4CZO-gIZu-c05A-rrQf-uNw9-zC3B-p5h2vV
>
> tufkal at tux:~$ sudo lvm lvdisplay
> --- Logical volume ---
> LV Name /dev/lvmhome/home
> VG Name lvmhome
> LV UUID WrEbxl-7pck-lwbJ-w3V7-BNiZ-ttge-QvIL9r
> LV Write Access read/write
> LV Status available
> # open 1
> LV Size 325.82 GB
> Current LE 83409
> Segments 4
> Allocation inherit
> Read ahead sectors 0
> Block device 253:0
>
> tufkal at tux:~$
>
> AND WHILE IM AT IT, FOR FUTURE REFERENCE
>
> What is the correct way to add a partition to a LVM (like if I slap
> another drive in there).
>
> Thanks in advance.
>
>
> ------------------------------------------------------------------------
>
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> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
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