Hello, I have been trying to setup LVM for the first time on an RAID 5 Array. The problem I have is that the raid array has 640Gb of usable space, but when I create the LVM Physical Volume and Volume group I wind up with 596Gb. I don't know where 44 gigs went to. I am on Debian with a 2.6.17 kernel. When I do fdisk -l I get this: fdisk -l Disk /dev/sda: 639.9 GB, 639977390080 bytes 255 heads, 63 sectors/track, 77806 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk /dev/sda doesn't contain a valid partition table Disk /dev/hda: 163.9 GB, 163928604672 bytes 255 heads, 63 sectors/track, 19929 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/hda1 * 1 19740 158561518+ 83 Linux /dev/hda2 19741 19929 1518142+ 5 Extended /dev/hda5 19741 19929 1518111 82 Linux swap / Solaris Here you can see /dev/sda is 639.9GB. I then do: $ pvcreate /dev/sda Physical volume "/dev/sda" successfully created $ pvdisplay /dev/sda --- NEW Physical volume --- PV Name /dev/sda VG Name PV Size 596.03 GB Allocatable NO PE Size (KByte) 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID po9rKd-gOKR-jfmx-yjUm-R5Wl-us2j-s6qZN1 You see here I only get 596Gb. Also if I run the lvmdiskscan utility I get: lvmdiskscan /dev/ram0 [ 8.00 MB] /dev/sda [ 596.03 GB] LVM physical volume /dev/ram1 [ 8.00 MB] /dev/hda1 [ 151.22 GB] /dev/ram2 [ 8.00 MB] /dev/ram3 [ 8.00 MB] /dev/ram4 [ 8.00 MB] /dev/ram5 [ 8.00 MB] /dev/hda5 [ 1.45 GB] /dev/ram6 [ 8.00 MB] /dev/ram7 [ 8.00 MB] /dev/ram8 [ 8.00 MB] /dev/ram9 [ 8.00 MB] /dev/ram10 [ 8.00 MB] /dev/ram11 [ 8.00 MB] /dev/ram12 [ 8.00 MB] /dev/ram13 [ 8.00 MB] /dev/ram14 [ 8.00 MB] /dev/ram15 [ 8.00 MB] 0 disks 18 partitions 1 LVM physical volume whole disk 0 LVM physical volumes Again listing 596.03Gb. What's going on here. Why do I seem to be getting less capacity in the physical volume than actually on the drive. I really would like to use LVM but if I am going to lose 40Gigs then its not really worth it. Any help or ideas would be appreciated. Regards, Michael MacFadden _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
