Thursday, January 24, 2013

Add a new LUN to live Multipath environment CentOS/RHEL


  • Rescan SCSI bus:
    # /usr/bin/rescan-scsi-bus.sh
  • Lookup the names of newly available disks
    # lsblk
  • Lookup WWID for each newly discovered disk:
    # scsi_id --page=0x83 --whitelisted --device=/dev/<disk>
  • Add those WWIDs to blacklist_exceptions and multipaths in /etc/multipath.conf.
  • Reload multipathd and check the disks are properly configured:
    # /etc/init.d/multipathd reload
    # lsblk
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