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

On Sat, Jul 14, 2018 at 2:15 PM Tony Schreiner <anthony.schreiner at
bc.edu> wrote:
> I don't have an answer to why kernel 514 is not booting,
> but what I was trying to say is:
>
> /dev/lvm_pool/lvol001
> and
> /dev/mapper/lvm_pool-lvol001
> are both symlinks to the same /dev/dm-X device file.
> You can use either name, but the one you listed was missing the volume
> group name
kernel 514 does boot.
kernel 862 hangs/panics.
I will try both entries in your example above on kernel 514 to confirm.
If both work then I'll try them also on kernel 862 to see if possibly
one will work.
thanks for your help.

/dev/lvm_pool/lvol001 and /dev/mapper/lvm_pool-lvol001 work with kernel 514.

they don't work with kernel 862.

the googling continues . . .

Cannot get the system storage manager (ssm) to create the raid 1 array
with logical volume and xfs file system in one step.
Cannot find my error or omission.
The 862 kernel crashes on reboot every time.
I went back to simple lvm on raid and everything worked on the first
try --- man page reviews and implementation complete in under 30 mins.
I'm giving myself permission to let it be.  :-)

Tested. Confirmed. Works --

fdisk /dev/sdb
primary partition
partition 1
type: fd
write to disk and exit.

fdisk /dev/sdc
primary partition
partition 1
type: fd
write to disk and exit.

[root at localhost ~]# systemctl reboot
[root at localhost ~]# mdadm --create /dev/md0 --level=1 --raid-devices=2
/dev/sdb1 /dev/sdc1
[root at localhost ~]# cat /proc/mdstat
[root at localhost ~]# systemctl reboot
[root at localhost ~]# ssm create --fstype xfs -p alpha -n charlie
/dev/md0 /mnt/data
add the following to /etc/fstab:  /dev/mapper/alpha-charlie
/mnt/data        xfs    defaults    0 0
[root at localhost ~]# systemctl reboot
copy/move/read/write/to/from  /mnt/data --- yes to all.

On Sat, Jul 14, 2018 at 2:25 PM Mike <1100100 at gmail.com>
wrote:
>
> /dev/lvm_pool/lvol001 and /dev/mapper/lvm_pool-lvol001 work with kernel
514.
>
> they don't work with kernel 862.
>
> the googling continues . . .