On 19/12/2020 17:32, Dale wrote:
Neil Bothwick wrote:
On Sat, 19 Dec 2020 07:02:23 -0600, Dale wrote:
I have another question related to LVM. Let's say a system crashes and
dies. Or I just move a drive, or drives, with LVM on it to another
system. Does the system just recognize the drives and knows how to add
them or do I have to do that manually on the new system?
It should just work if you move all the PVs in the volume group. One
thing to watch out for is if the destination system is already using LVM,
the volume groups must be named differently. That's why I always use
unique VG names based on the hostname.
Ahhh, so it stores the info on the drive so that it knows what it is.
Neato!! I was thinking it was in /etc/lvm/ or something. I've wondered
about that for a while now.
mdadm version 0 stored its information in mdadm.conf. That was a mistake
- it had the downside you couldn't boot from the array, it was wide open
to errors, arrays were regularly trashed because things had got
confused, etc etc. Sticking all the necessary information in a
superblock is now considered must-do good practice.
Naming them based on hostname is also a good idea. I don't have mine
named that way but if I ever redo them, I will. It could save me some
problems down the road.
Again, that's now the default for mdadm - not necessarily the user name,
but the internal array name is something like "tigger:0", to quote one
of mine - array 0 created on tigger.
Cheers,
Wol
