[linux-lvm] how to change UUID of PV of duplicate partition (followup)
list at xenhideout.nl
Fri Jan 6 19:10:20 UTC 2017
This is what I mean:
Found duplicate PV 3U9ac3Ah5lcZUf03Iwm0cgMMaKxdflg0: using /dev/sdb4
Using duplicate PV /dev/sdb4 without holders, replacing /dev/sdc4
Volume group containing /dev/sdb4 has active logical volumes
Physical volume /dev/sdb4 not changed
0 physical volumes changed / 1 physical volume not changed
It immediately replaced the good PV with the bad PV (that I was trying
to change) so I cannot actually get to the "bad" PV (which is duplicate)
to change it without booting an external system in which I can effect
one disk in isolation.
But, after running that command my root filesystem was now mounted
read-only instantly so even just attaching the disk basically causes the
entire system to instantly fail.
Real good right.
Probably my entire fault right :-/.
"Let's cause this system to crash, we'll attach a harddisk." "Job done!"
Actually I guess in this case it replaced the bad with the good but
behind the scenes something else happened as well. This time it is
hiding /dev/sdc4, the other time it was hiding /dev/sdb4, it seems to be
Basically any eSata system that a disk gets attached to could cause the
operating system to fail. The same would probably be true of regular USB
Even inserting a USB stick could crash a system like this.
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