Try a scsi rescan after srdf split and before pvscan => echo 1 > /sys/block/sdm/device/rescan After that reload device maps => multipath -r /dev/sdm And now vgimport.
Linux Redhat 6.4 vMAX40k (local) -> vMAX40k(remote), both on 5876.  The problem is with the vgimport, the underline volumes are presented under VMware ESXi host v5.1, then presented to VM machine (linux platform) as RDM disk.  Local/source server: [root[NAME] ~]# umount /rdf [root[NAME] ~]# vgchange -a n vg_rdf   0 logical volume(s) in volume group "vg_rdf" now active [root[NAME] ~]# vgexport vg_rdf   Volume group "vg_rdf" successfully exported  Then I did split/failover (both option came back with same symptom) on the SRDF pairs.  Remote/Target server: [root[NAME] ~]# pvscan   PV /dev/sdm     is in exported VG vg_rdf [10.00 GiB / 96.00 MiB free]   PV /dev/sda3 VG vg00      lvm2 [55.09 GiB / 0 free]   PV /dev/sda2 VG vg_swap   lvm2 [24.41 GiB / 0    free]   Total: 3 [89.50 GiB] / in use: 3 [89.50 GiB] / in no VG: 0 [0   ] [root[NAME] ~]# vgimport vg_rdf   /dev/sdm: open failed: Read-only file system [root[NAME] ~]# vgchange -a y vg_rdf   Volume group "vg_rdf" is exported  Anyone can shed on some light? Appreciate it.
Problem with vgimport on SRDF R2 device on Linux