change some settings in /etc/iscsi/iscsid.conf:

node.conn[0].timeo.noop_out_interval = 5
node.conn[0].timeo.noop_out_timeout = 10
node.session.timeo.replacement_timeout = 15

/etc/init.d/iscsi start

iscsiadm -m iface -I iface0 –op=new
iscsiadm -m iface -I iface1 –op=new
iscsiadm -m iface -I iface0 –op=update -n iface.hwaddress -v 00:11:22:33:44:55
iscsiadm -m iface -I iface1 –op=update -n iface.hwaddress -v 66:77:88:99:AA:BB

iscsiadm -m discovery -t st -p 10.X.X.X
iscsiadm -m node –loginall=all
iscsiadm -m session

The configuration file (/etc/multipath.conf) is set up by default

devnode_blacklist {
  devnode "^sda$"
  devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
  devnode "^hd[a-z]"
  devnode "^cciss!c[0-9]d[0-9]*"
}

multipaths {
  multipath {
    #get wwid by #multipath -ll
    wwid 360a9800043336a414c3a3954725a7869
    alias  my-lun0
  }

}
devices {
  device {
    vendor  "NETAPP"
    product  "LUN"
    path_grouping_policy  group_by_prio
    getuid_callout  "/sbin/scsi_id -g -u -s /block/%n"
    #prio_callout  "/opt/netapp/santools/mpath_prio_ontap /dev/%n"
    features  "1 queue_if_no_path"
    path_checker  readsector0
    failback  immediate
  }
}
/etc/init.d/multipathd start

multipath -ll

restart multipathd

restart iscsi

fdisk /dev/mpath/my-lun0

mkfs.ext3 /dev/mpath/my-lun0p1

mount /dev/mpath/my-lun0p1 /mnt