topic lvol size in Operating System - Linux

lvol size

Tonatiuh — Thu, 13 Jan 2005 13:50:16 GMT

RHAS 3 on a LUN of 124 GB size.

I have created the physical volume (ov) and the volme group (vg).

pvcreate -d /dev/sdd
vgcreate -s 128k /dev/vg01 /dev/sdd

But it limits the size of the logical volum (lvol) that I can create.

[root@itanium2 root]# lvcreate -L 123G /dev/vg01
lvcreate -- size 128974720 KB is larger than maximum VGDA kernel size of 8388352 KB

What can I do to create larger logical volumes (lvol)?

Re: lvol size

Steven E. Protter — Thu, 13 Jan 2005 22:28:42 GMT

Your volume group has too low a limit on the number of PE units it allows.

You need to re-create the volume group with different parameters.

command: vgcreate

parameters to look at:

-e max_pe
-s pe_size

You will need to up both from the default to make this work.

SEP

Re: lvol size

Slawomir Gora — Sun, 16 Jan 2005 16:01:22 GMT

Hi,
you can create only 65534 physical extents
in vg group.
in your example you can create lvol of size
128k*65534=8388352kB

If you want to create greater lvol you have to
create vg with bigger physical extend size
vgcreate -s 2M /dev/vg01 /dev/sdd

you can create max lvol 2M*65534=131068M