多路径ignoring map

FCSAN连接过来两块盘，但是配置多路径之后，只能发现一个盘
[root@CH17201 multipath]# multipath -ll
multipathdev1 (360002ac0000000000000001c00006b9e) dm-0 3PARdata,VV
size=5.0T features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
  |- 0:0:0:0 sda 8:0  active ready running
  `- 1:0:0:0 sdd 8:48 active ready running

然后执行multipath -r 时发现，将一个设备ignore是怎么回事啊？
Aug 11 16:27:38 | multipathdev2: ignoring map
Aug 11 16:27:38 | multipathdev2: ignoring map


message日志报错如下：
Aug 11 15:36:45 CH17201 kernel: device-mapper: table: 252:1: multipath: error getting device
Aug 11 15:36:45 CH17201 kernel: device-mapper: ioctl: error adding target to table
Aug 11 15:36:45 CH17201 kernel: device-mapper: table: 252:1: multipath: error getting device
Aug 11 15:36:45 CH17201 kernel: device-mapper: ioctl: error adding target to table
Aug 11 15:36:45 CH17201 multipathd: multipathdev2: ignoring map
Aug 11 15:36:45 CH17201 kernel: device-mapper: table: 252:1: multipath: error getting device
Aug 11 15:36:45 CH17201 kernel: device-mapper: ioctl: error adding target to table
Aug 11 15:36:45 CH17201 kernel: device-mapper: table: 252:1: multipath: error getting device
Aug 11 15:36:45 CH17201 kernel: device-mapper: ioctl: error adding target to table
Aug 11 15:36:45 CH17201 multipathd: multipathdev2: ignoring map
Aug 11 15:36:46 CH17201 multipathd: multipathdev1: event checker started

配置文件如下：
blacklist {
}
defaults {
        udev_dir        /dev
        path_grouping_policy    multibus
        failback    15
        no_path_retry   fail
        user_friendly_names yes
}
multipaths {
        multipath {
                wwid 360002ac0000000000000001f00006b9e
                alias multipathdev2
        }
        multipath {
                wwid 360002ac0000000000000001c00006b9e
                alias multipathdev1
        }
}