At Fri, 25 Feb 2011 15:15:34 +0200 CentOS mailing list <centos at centos.org> wrote: > > I'm trying to create a 500GB lv volume on a 500GB physical volume, but can't: > > [root at 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 at 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 at 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. > > > > -- Robert Heller -- 978-544-6933 / heller at deepsoft.com Deepwoods Software -- http://www.deepsoft.com/ () ascii ribbon campaign -- against html e-mail /\ www.asciiribbon.org -- against proprietary attachments