[linux-lvm] lvextend

[Terry Rigby]

I am trying to add a full hard drive to my LV by following the directions at
TLDP.org. It says there to use lvextend -L +XXG where XX is the size in GB
you want to add to the LV. Is there a more simple way to just add a whole
hard drive ie: /dev/hde

It seems like a pain to have to manually figure out the size of the hard drive
then add it using lvextend -L +200GB for a 200GB hard drive especially since
we all know its not actually 200GB.

Thanks for your response.

Terry Rigby

[Sean Boyd]

Post by Terry Rigby
I am trying to add a full hard drive to my LV by following the directions at
TLDP.org. It says there to use lvextend -L +XXG where XX is the size in GB
you want to add to the LV. Is there a more simple way to just add a whole
hard drive ie: /dev/hde
It seems like a pain to have to manually figure out the size of the hard drive
then add it using lvextend -L +200GB for a 200GB hard drive especially since
we all know its not actually 200GB.

You could increase the LV by using the remaining free physical extents
(PE).

To check how many PE's are available after extending the VG run
vgdisplay and check "Free PE / Size". The first value will give you the
total number of PE's available.

Then extend your LV using the -l switch to specify PE's rather than
having to determine a size using the -L switch.

For example "lvextend -l +25 /dev/volGroup00/myLVM" will extend myLVM by
25 PE's.

Of course you then need to extend to file system to be able to use this
extra space :)

--Sean

[Terry Rigby]

thx Sean, I had just stumbled upon that as well. another alternative seems to
be pvdislplay /dev/hde |grep "PV Size" and then use that size in GB using
lvextend -L +XXG /path/to/lv

Terry Rigby

Post by Sean Boyd

Post by Terry Rigby
I am trying to add a full hard drive to my LV by following the directions
at TLDP.org. It says there to use lvextend -L +XXG where XX is the size
in GB you want to add to the LV. Is there a more simple way to just add
a whole hard drive ie: /dev/hde
It seems like a pain to have to manually figure out the size of the hard
drive then add it using lvextend -L +200GB for a 200GB hard drive
especially since we all know its not actually 200GB.

You could increase the LV by using the remaining free physical extents
(PE).
To check how many PE's are available after extending the VG run
vgdisplay and check "Free PE / Size". The first value will give you the
total number of PE's available.
Then extend your LV using the -l switch to specify PE's rather than
having to determine a size using the -L switch.
For example "lvextend -l +25 /dev/volGroup00/myLVM" will extend myLVM by
25 PE's.
Of course you then need to extend to file system to be able to use this
extra space :)
--Sean
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[dean gaudet]

you could do "pvdisplay /dev/hde" to find the number of extents... then
use "lvextend -l" instead of -L ...

-dean

Post by Terry Rigby
I am trying to add a full hard drive to my LV by following the directions at
TLDP.org. It says there to use lvextend -L +XXG where XX is the size in GB
you want to add to the LV. Is there a more simple way to just add a whole
hard drive ie: /dev/hde
It seems like a pain to have to manually figure out the size of the hard drive
then add it using lvextend -L +200GB for a 200GB hard drive especially since
we all know its not actually 200GB.
Thanks for your response.
Terry Rigby
_______________________________________________
linux-lvm mailing list
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/