6.6. Insufficient Free Extents for a Logical Volume
6.6. Insufficient Free Extents for a Logical Volume You may get the error message "Insufficient free extents" when creating a logical volume when you think you have enough extents based on the output of the vgdisplay or vgs commands. This is because these commands round figures to 2 decimal places to provide human-readable output. To specify exact size, use free physical extent count instead of a multiple of bytes to determine the size of the logical volume. The vgdisplay command, by default, includes this line of output that indicates the free physical extents. Alternately, you can use the vg_free_count and vg_extent_count arguments of the vgs command to display the free extents and the total number of extents. With 8780 free physical extents, you can enter the following command, using the lower-case l argument to use extents instead of bytes: This uses all the free extents in the volume group. Alternately, you can extend the logical volume to use a percentage of the remaining free space in the volume group by using the -l argument of the lvcreate command. For information, see Section 4.4.1, "Creating Linear Logical Volumes" .
vgdisplay --- Volume group --- Free PE / Size 8780 / 34.30 GB vgs -o +vg_free_count,vg_extent_count VG #PV #LV #SN Attr VSize VFree Free #Ext testvg 2 0 0 wz--n- 34.30G 34.30G 8780 8780 lvcreate -l 8780 -n testlv testvg vgs -o +vg_free_count,vg_extent_count VG #PV #LV #SN Attr VSize VFree Free #Ext testvg 2 1 0 wz--n- 34.30G 0 0 8780