New attached SAN disks doesn't appears in device mapper multipath?

Solution Verified - Updated -


  • 3 of newly attached disks are not multipathed. Can you provide documentation on how to add them to multipath configuration without incurring an outage?
/dev/sdc1 on /data1 type ext4 (rw,nodev)
/dev/sdd1 on /data2 type ext4 (rw,nodev)
/dev/sde1 on /data3 type ext4 (rw,nodev)
  • Also, we don't want to affect the current disk that is already multipathed.


  • Red Hat Enterprise Linux 6
  • Device Mapper(DM) Multipath

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