LV Size limits

[Marco Santerre]

Hello everyone,

It must be Monday! I can't seem to figure this one out. This weekend I've added a couple of disks in one of my VGs. But for some reason whenever I try to extend the LV, it won't let me. All it keeps saying is "Not enough free PE available. I've tried some searches but came up empty handed so far..

The command I'm issuing is
lvextend -l 13042 /dev/vgdbPRD_4/lvdata2 /dev/dsk/c58t3d1

The answer I'm getting is
lvextend: Not enough free physical extents available.
Logical Volume "/dev/vgdbPRD_4/lvdata2" could not be extended.

I'm sure this has to do with some physical limitation of my VG or LV, but I can't seem to find the answer.

Thanks

[Jeff Schussele]

Hi Marco,

What is the extent size in that VG/LV?

Why don't you use -L & give the new size in MB?
Then you don't have to remember the extent size.

Rgds,
Jeff

[A. Clay Stephenson]

I am going to make the assumption that you do, in fact, have enough free extents IN TOTAL on the VG to perform the operation. That being the case, the most likely problem is lack of enough free extents to allocate additional spacer and to make certain no mirror extents share a common physical volume. You are probably dealing with physical extent allocation policy issues.

[Marco Santerre]

ooops! I wante dto attach this and forgot..

PE Size is 4 Mg

[Hazem Mahmoud_3]

Well, it seems that the answer is in your vgdisplay output. There are 8,628 Free PE, while you are trying to expand it by 13,042. Try with something like 8,600 or like what was suggested before, use MB (with -L) instead. It's easier that way:)

-Hazem

[Jeff Schussele]

Hi (again) Marco,

An lvdisplay -v on that LV would be useful.

Jeff

[Jeff Schussele]

Hi Hazem,

Nope - the -l is the new *total* extents & just has to be larger than current & with his free count of 8K the ~5K addition *should* fit.

Rgds,
Jeff

[Marco Santerre]

Sorry guys,

without knowing it I steered you in the wrong direction.. it's just me not able to use the calculator on Windows, thinking it'd be faster by hand. I added a one when it wasn't needed. everything works fine now that I'm using -l 12942 instead of 13042.

Thanks guys..

P.S. lvdisplay was at the bottom of the vg display.

[Jeff Schussele]

Ooops - sorry - scrolled right by it.
Glad you solved it - now give yourself a bunny.

Cheers,
Jeff

[Hazem Mahmoud_3]

You're right about that Jeff, thanks for correcting me. It works the same way for the -L option where you specify the total MB you want and not the increment. I wasn't thinking straight. Looks like the Monday symptoms are hitting me too:)
Glad to hear you figured it out Marco!

-Hazem (no points for this post please)