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Hydraulix
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Joined: 12 Dec 2003
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 Posted: Wed Aug 23, 2006 9:46 am Post subject: Problem with lvextend. Sizolved |
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I'm trying to extend my /usr partition by 1G (just to see if this works) and it looks like it works but when I do a df -h I still see 20G. Am I missing something here?
| Code: |
compaq dev # df -h
Filesystem Size Used Avail Use% Mounted on
/dev/hda3 1.9G 139M 1.7G 8% /
udev 1.6G 196K 1.6G 1% /dev
/dev/sda1 294G 129M 279G 1% /ftp
/dev/mapper/vg-usr 20G 2.7G 17G 15% /usr
/dev/mapper/vg-home 9.9G 129M 9.3G 2% /home
/dev/mapper/vg-opt 5.0G 242M 4.5G 6% /opt
/dev/mapper/vg-var 9.9G 292M 9.1G 4% /var
/dev/mapper/vg-tmp 2.0G 65M 1.9G 4% /tmp
shm 1.6G 0 1.6G 0% /dev/shm
compaq dev # lvextend -L+1G /dev/vg/usr
/dev/cdrom: open failed: No medium found
Attempt to close device '/dev/cdrom' which is not open.
Extending logical volume usr to 21.00 GB
Logical volume usr successfully resized
compaq dev # df -h
Filesystem Size Used Avail Use% Mounted on
/dev/hda3 1.9G 139M 1.7G 8% /
udev 1.6G 196K 1.6G 1% /dev
/dev/sda1 294G 129M 279G 1% /ftp
/dev/mapper/vg-usr 20G 2.7G 17G 15% /usr
/dev/mapper/vg-home 9.9G 129M 9.3G 2% /home
/dev/mapper/vg-opt 5.0G 242M 4.5G 6% /opt
/dev/mapper/vg-var 9.9G 292M 9.1G 4% /var
/dev/mapper/vg-tmp 2.0G 65M 1.9G 4% /tmp
shm 1.6G 0 1.6G 0% /dev/shm
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Last edited by Hydraulix on Thu Aug 24, 2006 11:05 pm; edited 1 time in total |
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heikole
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Joined: 04 Oct 2004
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Location: Berlin, Germany
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| Posted: Wed Aug 23, 2006 11:27 am Post subject: |
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You also have to resize (extend) the filesystem residing on the logical volume /dev/mapper/vg-usr. Extending only the logical volume is not enough.
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Hydraulix
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Joined: 12 Dec 2003
Posts: 447
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| Posted: Wed Aug 23, 2006 1:26 pm Post subject: |
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| heikole wrote: | | You also have to resize (extend) the filesystem residing on the logical volume /dev/mapper/vg-usr. Extending only the logical volume is not enough. |
[
Ok i tried that but I got this.
| Code: |
compaq hydraulix # lvextend -L+2G /dev/mapper/vg-usr
/dev/cdrom: open failed: No medium found
Attempt to close device '/dev/cdrom' which is not open.
Volume group mapper doesn't exist
compaq hydraulix # cd /dev/mapper/
compaq mapper # ls
control vg-home vg-opt vg-tmp vg-usr vg-var
compaq mapper #
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heikole
Tux's lil' helper
Joined: 04 Oct 2004
Posts: 148
Location: Berlin, Germany
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| Posted: Wed Aug 23, 2006 1:34 pm Post subject: |
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Not exactly what I meant 
You probably have reiserfs or ext3 or some other filesystem set up on your logical volume. That's why you have to extend the filesystem itself using a command line tool like
| Code: | | resize_reiserfs /dev/mapper/vg-usr |
Similar commands are available for other (but not all) filesystems. Use
to see what filesystems are in use on your partitions or volumes.
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drescherjm
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Joined: 05 Jun 2004
Posts: 2790
Location: Pittsburgh, PA, USA
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| Posted: Wed Aug 23, 2006 9:41 pm Post subject: |
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Please post the output of
[EDIT]BTW, I believe you need a space between the -L and the +1G in the lvextend line [/EDIT]
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razze
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Joined: 09 Mar 2005
Posts: 161
Location: Espoo, Finland
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| Posted: Thu Aug 24, 2006 6:39 am Post subject: |
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The partition and the filesystem on that partition are not the same thing. They both need to be extended separately before you can use the new space. The output in your original post says that the LV /dev/vg/usr have successfully been extended, and you could verify this by | Code: | | #lvdisplay /dev/vg/usr |
Now you need to extend the filesystem on that LV, and how to do this depends on the filesystem used.
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Hydraulix
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Joined: 12 Dec 2003
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| Posted: Thu Aug 24, 2006 10:40 pm Post subject: |
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Here's the output. BTW I am using EXT3 on all my filesystems.
| Code: |
/dev/hda3 on / type ext3 (rw,noatime,data=journal)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec)
udev on /dev type tmpfs (rw,nosuid)
devpts on /dev/pts type devpts (rw,nosuid,noexec)
/dev/sda1 on /ftp type ext3 (rw,noatime,data=journal)
/dev/mapper/vg-usr on /usr type ext3 (rw,noatime,data=journal)
/dev/mapper/vg-home on /home type ext3 (rw,noatime,data=journal)
/dev/mapper/vg-opt on /opt type ext3 (rw,noatime,data=journal)
/dev/mapper/vg-var on /var type ext3 (rw,noatime,data=journal)
/dev/mapper/vg-tmp on /tmp type ext3 (rw,noatime,data=journal)
shm on /dev/shm type tmpfs (rw,noexec,nosuid,nodev)
usbfs on /proc/bus/usb type usbfs (rw,noexec,nosuid,devmode=0664,devgid=85)
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| Code: |
LV VG Attr LSize Origin Snap% Move Log Copy%
home vg -wi-ao 10.00G
opt vg -wi-ao 5.00G
tmp vg -wi-ao 2.00G
usr vg -wi-ao 22.00G
var vg -wi-ao 10.00
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| Code: |
--- Logical volume ---
LV Name /dev/vg/usr
VG Name vg
LV UUID IcUADG-jATr-JX1n-DL1p-9jI0-kJcS-38SAdz
LV Write Access read/write
LV Status available
# open 1
LV Size 22.00 GB
Current LE 5632
Segments 2
Allocation inherit
Read ahead sectors 0
Block device 254:0
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drescherjm
Advocate
Joined: 05 Jun 2004
Posts: 2790
Location: Pittsburgh, PA, USA
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| Posted: Thu Aug 24, 2006 10:50 pm Post subject: |
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The logical volume is indeed resized now you need to resize the filesystem: | Code: | | resize2fs /dev/vg/usr |
Should do the trick...
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Hydraulix
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Posts: 447
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| Posted: Thu Aug 24, 2006 11:01 pm Post subject: |
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| drescherjm wrote: | The logical volume is indeed resized now you need to resize the filesystem: | Code: | | resize2fs /dev/vg/usr |
Should do the trick... |
Worked like a charm. Thanks. 
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cayenne
l33t
Joined: 17 Oct 2002
Posts: 945
Location: New Orleans
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| Posted: Sun Apr 05, 2009 4:41 pm Post subject: this might do it |
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| heikole wrote: | Not exactly what I meant
You probably have reiserfs or ext3 or some other filesystem set up on your logical volume. That's why you have to extend the filesystem itself using a command line tool like
| Code: | | resize_reiserfs /dev/mapper/vg-usr |
Similar commands are available for other (but not all) filesystems. Use
to see what filesystems are in use on your partitions or volumes. |
Hi All,
I think I need to do this. I have reiserfs. Do you have to unmount the LV that you have expanded with lvextend (successfully) before you can use the reiserfs. I read that is said you needed to for reducing the size, but, what about extending it?
thanks in advance,
cayenne
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