On 12/05/2020 01:50 AM, Peter Grandi wrote: >> Are disk identifiers important in Linux (CentOS)? [...] Last, >> googling suggests there is confusion between disk identifiers >> and partition UUIDs. I am specifically asking about the >> former. > That "disk identifiers" is not specific. Which one do you mean > among disk serial numbers, disk WWNs, disk label identifiers? > Also apart from partition identifiers there are also partition > lavbels, MD set identifiers, MD member identifiers, and filetree > labels and identifiers. Not all of these are present in every > case. > > It may be interesting to have a look at the contents of the > '/dev/disk/by-*/' directories. > > As to the importance of any of these it depends on which > specific configuration goals you have. Each of them has some > advantages and disadvantages. I was referring to what fdisk -l calls "disk identifier". Interestingly enough I found neither the all-zeroes or the third disk with a UUID disk identifier in any of the /dev/disk/by-* subdirectories. Could it be used somewhere else?
