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Top Forums UNIX for Advanced & Expert Users How to shrink root file system (LVM) in Linux Fedora 9? Post 302807159 by maverick_here on Tuesday 14th of May 2013 08:12:07 AM
Old 05-14-2013
RedHat Linux Rescue mode

Shrink requires an unmount of the filesystem and since it is the root filesystem it cannot be done in the way it is done for none root filesystems.

Go to rescue mode using a bootable media ( First CD) and.
Do NOT mount /mnt/sysimage, press skip on this step.

You would be directed to rescue shell, In rescue shell do the following

Code:
a] vgchange -a y VGNAME
b] e2fsck -f /dev/VolGroup00/LogVol00
c] resize2fs -f /dev/VolGroup00/LogVol00 Size(in M,G)
d] lvresize -L Size /dev/VolGroup00/LogVol00

 

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vxdestroy_lvmroot(1M)													     vxdestroy_lvmroot(1M)

NAME
vxdestroy_lvmroot - remove LVM root disk and associated LVM volume group SYNOPSIS
vxdestroy_lvmroot [-v] [-b] lvm_root_disk DESCRIPTION
The vxdestroy_lvmroot command tears down and removes the LVM volume group associated with the specified physical disk. This is done by removing the volumes in the volume group and then removing the volume group. OPTIONS
-b Invokes the setboot command to change the primary boot disk to the VxVM root disk from which the system was booted (if the pri- mary boot disk is not already set to this disk). The alternate boot device remains unchanged. If the -v option is also speci- fied, the settings of the primary and alternate boot devices are displayed. -v Outputs verbose messages including a timestamp that indicates major operations being performed. ARGUMENTS
lvm_root_disk Specifies the device name of the LVM root disk that is to be destroyed, along with its entire volume group. EXAMPLES
This example shows the vxdestroy_lvmroot command invoked in its simpliest form: /etc/vx/bin/vxdestroy_lvmroot c5t1d0 # /etc/vx/bin/vxdestroy_lvmroot -v -b c3t0d0 Are you sure about destroying c3t0d0 (imported on VG /dev/vg02) ? YES vxdestroy_lvmroot 06:02: Tearing down /dev/vg02 on device c3t0d0 vxdestroy_lvmroot 06:02: Unmounting and removing any volumes associated with /dev/vg02 vxdestroy_lvmroot 06:02: removing logical volume /dev/vg02/lvol1 vxdestroy_lvmroot 06:02: removing logical volume /dev/vg02/lvol2 vxdestroy_lvmroot 06:02: removing logical volume /dev/vg02/lvol3 vxdestroy_lvmroot 06:02: removing logical volume /dev/vg02/lvol4 vxdestroy_lvmroot 06:02: removing logical volume /dev/vg02/lvol5 vxdestroy_lvmroot 06:02: removing logical volume /dev/vg02/lvol6 vxdestroy_lvmroot 06:02: removing logical volume /dev/vg02/lvol7 vxdestroy_lvmroot 06:02: removing logical volume /dev/vg02/lvol8 vxdestroy_lvmroot 06:02: Removing Volume Group /dev/vg02 vxdestroy_lvmroot 06:02: Removing device files in /dev/vg02 vxdestroy_lvmroot 06:02: Removing LVM Physical Volume c3t0d0 vxdestroy_lvmroot 06:02: Removing LVM Physical Volume c1t1d3 vxdestroy_lvmroot 06:02: Removing LVM Physical Volume c1t1d4 vxdestroy_lvmroot 06:02: Removing LVM Physical Volume c1t1d5 vxdestroy_lvmroot 06:03: Current setboot values: vxdestroy_lvmroot 06:03: Primary: 0/0/6/0/0.0.0 vxdestroy_lvmroot 06:03: Alternate: 0/0/1/0/0.1.0 vxdestroy_lvmroot 06:03: Making disk c0t1d0 (0/0/1/0/0.1.0) the primary boot disk vxdestroy_lvmroot 06:03: Removal of device c3t0d0, volume group /dev/vg02 was successful SEE ALSO
cpio(1), dd(1), fsck(1M), setboot(1M) vxbootsetup(1M) vxcp_lvmroot(1M) vxres_lvmroot(1M) VxVM 5.0.31.1 24 Mar 2008 vxdestroy_lvmroot(1M)
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