>>> On 12/12/2018 at 11:39 AM, Neal Scheffler <vmwiz...@gmail.com> wrote: 
> The Linux group expanded the root vg to a second physical dasd volume.
> Doing a pvdisplay shows the PV Name of /dev/dasdm1
> zipl.conf was updated to include the parm "rd.dasd=0.0.010a" since
> this is part of the root file system.
> 
> After reboot, dasd 010a is now /dev/dasdb1 so the server reboot failed.
> 
> What is the best way to handle this?
> Should they be using /dev/disk/by-path/ccw-0.0.010a-part1 to reference
> the new dasd?

This doesn't make much sense to me.  LVM doesn't care about the names of block 
devices, whether /dev/dasdb1 or /dev/disk/by-path/ccw-0.0.010a-part1.  Apart 
from any block devices that are excluded in /etc/lvm/lvm.conf, LVM looks at all 
available block devices to see if they have any LVM metadata on them, and uses 
them regardless of their name.

Exactly _how_ did the reboot fail?


Mark Post

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