Hi Mike, Could you give us the output of : vgdisplay -v vg lvdisplay /dev/vg/myth I think your myth LV is already 1.5TB, so you only need to run : # mount -o remount,resize /dev/vg/myth for the JFS filesystem to be resized. Please backup everything before running that :) However, since what you're doing essentially amounts to RAID0 without the performance benefits (if you lose one drive, your data is lost), I'd run a full backup and run the following commands to create a striped LV : lvremove /dev/vg/myth vgremove vg pvremove /dev/sdb1 pvremove /dev/sdc1 dd if=/dev/zero of=/dev/sdb bs=4096 count=10000 dd if=/dev/zero of=/dev/sdb bs=4096 count=10000 pvcreate /dev/sdb pvcreate /dev/sdc vgcreate vg /dev/sdb /dev/sdc lcreate -i 2 -I 8 -L 1700M -n myth vg /dev/sdb /dev/sdc (adjust 1700 to whatever your drives will take) mkfs.jfs /dev/vg/myth You will lose a bit of space but gain some performance ; the available VG size can then be used for other LVs or snapshots. Best, Francois On Fri, 23 Jan 2009 11:14:35 -0600 ctd@minneapolish3.com wrote: > Hey there, > > > > I have most likely a simple question concerning LVM that I figured someone might be able to provide some insight into. > > > > I just setup LVM with both /dev/sdb1 and /dev/sdc1 being assigned to my “vg” volume group. There is only one logical volume “myth” off of “vg”. > > > > My steps: > > fdisk /dev/sdc [created 1 partition to span the entire drive of type 8e] > emerge lvm2 > vgscan > vgchange -a y > pvcreate /dev/sdc1 > vgcreate vg /dev/sdc1 > lvcreate -L900GB -nmyth vg > mkfs.jfs /dev/vg/myth > fdisk /dev/sdb [created 1 partition to span the entire drive of type 8e] > pvcreate /dev/sdb1 > vgextend vg /dev/sdb1 > lvextend -L+700G /dev/vg/myth > > > Sdb1: 700GB drive with one partition > > Sdd1: 1TB drive with one partition > > > My question is related to the space available in /dev/vg/myth. I > would assume that I should have ~1.7TB of space on that logical > partition, but df does not seems to indicate that. > > > # df > Filesystem 1K-blocks Used Available Use% Mounted on > … > /dev/mapper/vg-myth 943656628 544996248 398660380 58% /mnt/store > … > mythserver michael # pvdisplay /dev/sdb1 > --- Physical volume --- > PV Name /dev/sdb1 > VG Name vg > PV Size 698.64 GB / not usable 2.34 MB > Allocatable yes > PE Size (KByte) 4096 > Total PE 178850 > Free PE 292 > Allocated PE 178558 > PV UUID SetyUA-DkWL-zDDo-Wm-3avR-nJH8-OnUujv > mythserver michael # pvdisplay /dev/sdc1 > --- Physical volume --- > PV Name /dev/sdc1 > VG Name vg > PV Size 931.51 GB / not usable 3.19 MB > Allocatable yes (but full) > PE Size (KByte) 4096 > Total PE 238466 > Free PE 0 > Allocated PE 238466 > PV UUID DX11mo-r0Eh-jN5N-objS-oqo6-eVSU-MShkS2 > mythserver michael # lvextend -L+700G /dev/vg/myth > Extending logical volume myth to 2.27 TB > Insufficient free space: 179200 extents needed, but only 292 available > > I am guessing that I should have run these commands to extend the logical volume to its desired size: > vgextend vg /dev/sdb1 > lvextend -L+700G /dev/vg/myth > > before creating the filesystem with this command which I am guessing locked the size to the 900GB with I used in my setup steps > mkfs.jfs /dev/vg/myth > > > Does that sound like my issue? > > Any thoughts on how to get out of this situation while ensuring no loss of my data that currently resides on /dev/mapper/vg-myth? > > > I am thinking that the following steps should work: > Copy all of my files on /dev/mapper/vg-myth to other paritions (I > assume the call to mkfs.jfs below will delete all the contents of this > partition) > "lvreduce -L-641G /dev/vg/myth" (to get the size matched up with 931GB + 698GB [ 2.27TB – 931GB – 698GB) > "mkfs.jfs /dev/vg/myth" (recreate the filesystem now that the size has been corrected) > remount /dev/vg/myth > copy back the files > > Thanks in advance > Mike > > _______________________________________________ > 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/ _______________________________________________ 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/
