[lug] LVM and software raid

David L. Anselmi anselmi at anselmi.us
Mon Oct 2 22:13:53 MDT 2006

Nick Golder wrote:

> LVM did something strange - the PV Name has changed from
> /dev/md0 to /dev/sdc1 (sdc1 being a member of md0).
> I get this anytime I start working with the PV:
> Found duplicate PV jkHruDmfHDnFPJ3W4kDvtI5agwGC4FJJ: using /dev/sdc1 not
> /dev/sda1

Perhaps looking at the various device numbers will tell you something. 
The sd*, md*, and vg* numbers will tell you what the kernel thinks they 
are and it's probably bad to use if /dev/sdc* is major 8 (a SCSI device 
rather than software RAID).

Does mdadm tell you anything useful?


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