Rudi Ahlers
2011-Feb-25 13:15 UTC
[CentOS] can't create large LVM, even though pvscan shows enough space left
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 How do I actually create a 500GB volume? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532
Simon Matter
2011-Feb-25 13:27 UTC
[CentOS] can't create large LVM, even though pvscan shows enough space left
> 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 freenasYou just named different, the size is the same. Did you mix up the -L and -n options? Simon
Lamar Owen
2011-Feb-25 14:00 UTC
[CentOS] can't create large LVM, even though pvscan shows enough space left
On Friday, February 25, 2011 08:15:34 am Rudi Ahlers wrote:> [root at francois-pc ~]# lvcreate -L 500gig -n 500G freenas > Insufficient free extents (127999) in volume group freenas: 128000 required> How do I actually create a 500GB volume?try lvcreate -l 127999 -n 500G freenas The default '500G' size is 12,800 extents, but you only have 12,799 extents free; which gets rounded *up* to 500G by the free space display. And that's a lower-case 'L' option, not an upper-case 'I' option.
Robert Heller
2011-Feb-25 14:34 UTC
[CentOS] can't create large LVM, even though pvscan shows enough space left
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