RAC 19c: ASM disk not in multipath

Hi,

we have a two node RAC 19c:

$ crsctl query crs softwareversion -all

Oracle Clusterware version on node [*****1] is [19.0.0.0.0]

Oracle Clusterware version on node [*****2] is [19.0.0.0.0]

We've found a strange configuration related to an ASM DISK (it's a new contact, we're still in discovery phase). This RAC has 3 databases with 17 ASM disks. 16 disk are configured in multipath.conf, and 1 it is not.

This is because the LUN presented by SAN has been partitioned in primay and extended,and ONLY the primary partition has been provisioned using multipath. The second one is in direct attach (I think...). two ASM DISKS has been cfreated using this partitions, EXT1 and EXT2. This scenario probably has been made because in multipath.conf the LUN ID can be present only once, and both primary and extended partition have the same id string.