CentOS - Jul 2018 - ssm vs. lvm: moving physical drives and volume group to another system

When I change /etc/fstab from /dev/mapper/lvol001 to
/dev/lvm_pool/lvol001, kernel 3.10.0-514 will boot.

Kernel 3.10.0-862 hangs and will not boot.
On Sat, Jul 14, 2018 at 1:20 PM Mike <1100100 at gmail.com>
wrote:
>
> Maybe not a good assumption afterall --
>
> I can no longer boot using kernel 3.10.0-514 or 3.10.0-862.
>
> boot.log shows:
>
> Dependency failed for /mnt/data
> Dependency failed for Local File Systems
> Dependency failed for Mark the need to relabel after reboot.
> Dependency failed for Migrate local SELinux policy changes from the
> old store structure to the new structure.
> Dependency failed for Relabel all filesystems, if necessary.
>
>
> On Sat, Jul 14, 2018 at 12:55 PM Mike <1100100 at gmail.com> wrote:
> >
> > I did the following test:
> >
> > ###############################################
> > 1.
> >
> > Computer with Centos 7.5 installed on hard drive /dev/sda.
> >
> > Added two hard drives to the computer: /dev/sdb and /dev/sdc.
> >
> > Created a new logical volume in RAID-1 using RedHat System Storage
Manager:
> >
> > ssm create --fstype xfs -r 1 /dev/sdb /dev/sdc /mnt/data
> >
> > Everything works.
> > /dev/lvm_pool/lvol001 is mounted to /mnt/data.
> > Files and folders can be copied/moved, read/written on /mnt/data.
> >
> > ###############################################
> >
> > 2.
> >
> > I erased CentOS 7.5 from /dev/sda.
> > Wrote zeros to /dev/sda using dd.
> > Reinstalled CentOS 7 on /dev/sda.
> > Completed yum update - reboot - yum install system-storage-manager.
> >
> > RedHat system storage manager listed all existing volumes on the
computer:
> >
> > [root at localhost]# ssm list
> >
> >
--------------------------------------------------------------------------------------
> > Volume              Pool   Volume size  FS     FS size       Free
> > Type    Mount point
> >
--------------------------------------------------------------------------------------
> > /dev/cl/root        cl        65.00 GB  xfs   64.97 GB   63.67 GB
> > linear  /
> > /dev/cl/swap        cl         8.00 GB
> > linear
> > /dev/lvm_pool/lvol001 lvm_pool200.00 GB xfs  199.90 GB  184.53 GB
> > raid1   /mnt/data
> > /dev/cl/home        cl       200.00 GB  xfs  199.90 GB  199.87 GB
> > linear  /home
> > /dev/sda1                      4.00 GB  xfs    3.99 GB    3.86 GB
> > part    /boot
> >
--------------------------------------------------------------------------------------
> > [/CODE]
> >
> > So far, so good.  The new CentOS7 install can see the logical volume.
> >
> > Mounted the volume:  ssm mount -t xfs /dev/lvm_pool/lvol001 /mnt/data
> > Works.
> > cd to /mnt/data and I can see the files left on the volume from the
> > previous tests.
> > Moving/copying/read/write -- works.
> >
> > ###################################################
> >
> > 3. Is it safe to assume when using RedHat System Storage Manager
it's
> > not necessary to use the lvm commands (vgexport and vgimport) to move
> > two physical drives containing a logical volume in raid 1 from one
> > computer to another?
> >
> > Thanks for your help and guidance.

On Sat, Jul 14, 2018 at 1:36 PM Mike <1100100 at gmail.com> wrote:
> When I change /etc/fstab from /dev/mapper/lvol001 to
> /dev/lvm_pool/lvol001, kernel 3.10.0-514 will boot.
>
> Kernel 3.10.0-862 hangs and will not boot.
> On Sat, Jul 14, 2018 at 1:20 PM Mike <1100100 at gmail.com> wrote:
>
> Is that first entry /dev/mapper/lvol001 right?
I'd expect /dev/mapper/lvm_pool-lvo001

Tried --

umount -t xfs /mnt/data
vgchange -a n lvm_pool
vgexport lvm_pool
vgimport lvm_pool

Rebooted and kernel 862 still panics/hangs.
Can boot into kernel 514.

On Sat, Jul 14, 2018 at 1:35 PM Mike <1100100 at gmail.com>
wrote:
>
> When I change /etc/fstab from /dev/mapper/lvol001 to
> /dev/lvm_pool/lvol001, kernel 3.10.0-514 will boot.
>
> Kernel 3.10.0-862 hangs and will not boot.
> On Sat, Jul 14, 2018 at 1:20 PM Mike <1100100 at gmail.com> wrote:
> >
> > Maybe not a good assumption afterall --
> >
> > I can no longer boot using kernel 3.10.0-514 or 3.10.0-862.
> >
> > boot.log shows:
> >
> > Dependency failed for /mnt/data
> > Dependency failed for Local File Systems
> > Dependency failed for Mark the need to relabel after reboot.
> > Dependency failed for Migrate local SELinux policy changes from the
> > old store structure to the new structure.
> > Dependency failed for Relabel all filesystems, if necessary.
> >
> >
> > On Sat, Jul 14, 2018 at 12:55 PM Mike <1100100 at gmail.com>
wrote:
> > >
> > > I did the following test:
> > >
> > > ###############################################
> > > 1.
> > >
> > > Computer with Centos 7.5 installed on hard drive /dev/sda.
> > >
> > > Added two hard drives to the computer: /dev/sdb and /dev/sdc.
> > >
> > > Created a new logical volume in RAID-1 using RedHat System
Storage Manager:
> > >
> > > ssm create --fstype xfs -r 1 /dev/sdb /dev/sdc /mnt/data
> > >
> > > Everything works.
> > > /dev/lvm_pool/lvol001 is mounted to /mnt/data.
> > > Files and folders can be copied/moved, read/written on /mnt/data.
> > >
> > > ###############################################
> > >
> > > 2.
> > >
> > > I erased CentOS 7.5 from /dev/sda.
> > > Wrote zeros to /dev/sda using dd.
> > > Reinstalled CentOS 7 on /dev/sda.
> > > Completed yum update - reboot - yum install
system-storage-manager.
> > >
> > > RedHat system storage manager listed all existing volumes on the
computer:
> > >
> > > [root at localhost]# ssm list
> > >
> > >
--------------------------------------------------------------------------------------
> > > Volume              Pool   Volume size  FS     FS size       Free
> > > Type    Mount point
> > >
--------------------------------------------------------------------------------------
> > > /dev/cl/root        cl        65.00 GB  xfs   64.97 GB   63.67 GB
> > > linear  /
> > > /dev/cl/swap        cl         8.00 GB
> > > linear
> > > /dev/lvm_pool/lvol001 lvm_pool200.00 GB xfs  199.90 GB  184.53 GB
> > > raid1   /mnt/data
> > > /dev/cl/home        cl       200.00 GB  xfs  199.90 GB  199.87 GB
> > > linear  /home
> > > /dev/sda1                      4.00 GB  xfs    3.99 GB    3.86 GB
> > > part    /boot
> > >
--------------------------------------------------------------------------------------
> > > [/CODE]
> > >
> > > So far, so good.  The new CentOS7 install can see the logical
volume.
> > >
> > > Mounted the volume:  ssm mount -t xfs /dev/lvm_pool/lvol001
/mnt/data
> > > Works.
> > > cd to /mnt/data and I can see the files left on the volume from
the
> > > previous tests.
> > > Moving/copying/read/write -- works.
> > >
> > > ###################################################
> > >
> > > 3. Is it safe to assume when using RedHat System Storage Manager
it's
> > > not necessary to use the lvm commands (vgexport and vgimport) to
move
> > > two physical drives containing a logical volume in raid 1 from
one
> > > computer to another?
> > >
> > > Thanks for your help and guidance.

On Sat, Jul 14, 2018 at 1:57 PM Tony Schreiner <anthony.schreiner at
bc.edu> wrote:
>
> >
> > Is that first entry /dev/mapper/lvol001 right?
> I'd expect /dev/mapper/lvm_pool-lvo001
ssm list shows -

/dev/lvm_pool/lvol001

When I place /dev/lvm_pool/lvol001 into /etc/fstab the computer will
boot using kernel 514.
Kernel 862 still hangs/panics.