On Sat, 2006-02-11 at 11:26 -0500, Mark Haney wrote: > I am having a problem with df reporting the wrong disk size on a couple > of 7TB arrays on a Fedora box we are using. I have an lvm group on each > array of 6.36TB when I run df this is what I get: > > /dev/mapper/Volume02-Volume02lv > 2.4T 33M 2.3T 1% /mnt/arrays/array2 > /dev/mapper/Volume03-Volume03lv > 2.4T 950G 1.3T 43% /mnt/arrays/array1 > > > When I run vg display this is what it reports: > > pvdisplay PV Name /dev/sdd > pvdisplay VG Name Volume03 > pvdisplay PV Size 6.36 TB / not usable 6.00 TB > pvdisplay Allocatable yes (but full) > pvdisplay PE Size (KByte) 4096 > pvdisplay Total PE 1666397 > pvdisplay Free PE 0 > pvdisplay Allocated PE 1666397 > pvdisplay PV UUID UlaSJI-9Srm-e3AW-LdNW-g2HG-v6ZE-4yWwPw > pvdisplay > pvdisplay --- Physical volume --- > pvdisplay PV Name /dev/sdc > pvdisplay VG Name Volume02 > pvdisplay PV Size 6.36 TB / not usable 6.00 TB > pvdisplay Allocatable yes (but full) > pvdisplay PE Size (KByte) 4096 > pvdisplay Total PE 1666397 > pvdisplay Free PE 0 > pvdisplay Allocated PE 1666397 > pvdisplay PV UUID mK7WWj-UV0p-N6Qc-zhx6-EK3J-g0CO-g65ljs > > > I've looked around for a lvm tool to display the correct sizes, but > can't find one. Is there something I'm missing? > > Not sure why you are using LVM if you are going to entirely allocate the VG, might as well just use the partition directly.... First problem. Given the PE Size of 4MiB, you might be hitting a limit on how much of the PV can be used. You probably should have bumped up the PE Size when you created the VG.... Take a look at the man page for vgcreate (no it can't be changed after the fact), but this may identify the "not usable" phrase you are seeing. pvdisplay has nothing to do with the filesystems, supplying that means nothing. Now lvdisplay will show you the size of the underlying logical volume (Virtual partition). df is showing you the size of the filesystem laid on top of that logical volume. You haven't told us what Fedora version you are running, but, yes, I would be concerned about it reporting 2TiB.... Showing us lvdisplay output and tune2fs output could probably tell someone more.... --Rob
