Craig White wrote:
I was able to reduce the size of the logical volumes, move the logical volumes so they are adjacent and then reduce the size of the physical LVM but I cannot seem to reduce the partition itself and I'm gathering that this may not be possible. # pvdisplay --- Physical volume --- PV Name /dev/sda2 VG Name VolGroup00 PV Size 95.00 GB / not usable 31.81 MB Allocatable yes PE Size (KByte) 32768 Total PE 3039 Free PE 127 Allocated PE 2912 PV UUID oAYcCQ-5n28-0C6i-1LLE-voCR-E19v-SQYQK0 # fdisk -l /dev/sda Disk /dev/sda: 203.9 GB, 203928109056 bytes 255 heads, 63 sectors/track, 24792 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x00086350 Device Boot Start End Blocks Id System /dev/sda1 * 1 13 104391 83 Linux /dev/sda2 14 24792 199037317+ 8e Linux LVM # df -h Filesystem Size Used Avail Use% Mounted on /dev/root 88G 54G 30G 65% / /dev/sda1 99M 36M 59M 39% /boot so in the end, /dev/sda2 remains approximately 200G and even the gpartd-liveCD cannot resize /dev/sda2 ;-( Is it even possible?
What you are attempting is not a common way to use the LVM system. I often create many pv on one disk (sda2, sda3, sda4) just to avoid this kind of problems. The pv is now 95G, so only the first 95G of sda2 are used (usable). Now, thinking about it, resizing sda2 could simply mean you have to delete and immediately recreate sda2 with a smaller size. We just have to be sure about where the pv metadata are stored. According to http://www.guug.de/lokal/rhein-main/2004-09-23/LVM2_sage_23.09.pdf we learn that LVM2 format is an ASCII text format which is at the beginning, after a disk label, of every PV in 2 copies by default in large configurations... so it is at the beginning of the pv. The procedure I'd try (assuming I had a backup of everything, as _this is obviously dangerous_): 1) Boot from CD and without any kind of lvm detection. 2) Destroy sda2 and recreate it as 100G. 3) Boot the system again, check that the LVM is OK and pvresize sda2 in automatic size (so it goes from 95G to 100G). Step 3) avoids that you have to calculate the new size for sda2, which is very difficult because of the partition and LVM roundings. If you find the courage to try this, let me know how it went. :-) -- Roberto Ragusa mail at robertoragusa.it -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
