At Fri, 25 Feb 2011 15:15:34 +0200 CentOS mailing list centos@centos.org wrote:
I'm trying to create a 500GB lv volume on a 500GB physical volume, but can't:
[root@francois-pc ~]# pvscan PV /dev/sdd VG freenas lvm2 [500.00 GB / 500.00 GB free] PV /dev/sdc VG thecus lvm2 [1010.00 GB / 910.00 GB free] PV /dev/mapper/ddf1_RAIDp2 VG VolGroup00 lvm2 [931.25 GB / 0 free] Total: 3 [2.38 TB] / in use: 3 [2.38 TB] / in no VG: 0 [0 ] [root@francois-pc ~]# lvcreate -L 500gig -n 500G freenas Insufficient free extents (127999) in volume group freenas: 128000 required
Even dropping the size a bit, I get this:
[root@francois-pc ~]# lvcreate -L 500gig -n 450G freenas Insufficient free extents (127999) in volume group freenas: 128000 required
'-n' is the *name*, -L is the size. You are still asking for a 500G sized volume.
Try this:
lvcreate -l 100%FREE -n volume freenas
This will create a logical volume (named volume) that uses all of the *available* free space, which will be *slightly* less than the 500B of the VG.
How do I actually create a 500GB volume?
You can't. There is one extent's worth of space used for LVM meta data.