All multipath devices have different wwids on each cluster node on Red Hat Enterprise Linux 5

Environment

• Red Hat Enterprise Linux 5 (RHEL5)
  • Issue observed on RHEL5 update 8. It is currently unknown if other updates are affected.
• device-mapper-multipath
  • Issue observed on device-mapper-multipath-0.4.7-48.el5_8.1. It is currently unknown if other versions are affected.
  • There are no aliases configured in multipaths {} section of /etc/multipath.conf
  • Aliases have been customized in the bindings file at /var/lib/multipath/bindings (or at the new location if bindings_file is configured in multipath.conf).
  • There are no multipath files in the initrd file.

• SAN storage shared between 2 different servers:

  • The wwid is different when read with the scsi_id command for the same device on different servers:

  node1# scsi_id -g -s /block/sdamf
  360060e80100ae4300530264b000002c3
  node2# scsi_id -g -s /block/sdfd
  360060e80100ae43000090010a28b02c3
  

  • SAN is a Hitachi DF600 model as per /proc/scsi/scsi:

  # cat /proc/scsi/scsi
  <some data omitted>
  Host: scsi5 Channel: 00 Id: 00 Lun: 275
    Vendor: HITACHI  Model: DF600F           Rev: 0000
    Type:   Direct-Access                    ANSI SCSI revision: 04