From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.redhat.com (mx1.redhat.com [172.16.48.31]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id n0NHHNP7026490 for ; Fri, 23 Jan 2009 12:17:58 -0500 Received: from sitemail.siteprotect.com (fw.mfg.onr.siteprotect.com [64.26.60.152]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id n0NHFKB7007473 for ; Fri, 23 Jan 2009 12:15:52 -0500 Received: from localhost (localhost [127.0.0.1]) by app00.sm.onr.chicago.hostway (Postfix) with ESMTP id 38416D0C0FF for ; Fri, 23 Jan 2009 11:14:35 -0600 (CST) MIME-Version: 1.0 Message-ID: <55636.1232730875@minneapolish3.com> Content-Type: text/plain; charset="utf-8" Date: Fri, 23 Jan 2009 11:14:35 -0600 From: ctd@minneapolish3.com Content-Transfer-Encoding: 8bit Subject: [linux-lvm] LVM Volume Size Question Reply-To: ctd@minneapolish3.com, LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: To: linux-lvm@redhat.com 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