不重啟服務器在線擴容FCSAN存儲

以下命令針對不增加LUN，只在存儲端修改LUN的大小后，linux在線更新LUN信息，并擴容LVM

multipath -ll /dev/mapper/dev01_OLD
for i in $(ls /sys/class/scsi_device/); do echo 1> /sys/class/scsi_device/$i/device/rescan; done #掃描所有LUN
multipathd resize map /dev/mapper/dev01_OLD
#擴容lvm
pvresize /dev/mapper/dev01_OLD
lvextend /dev/mapper/vgnfs-lvnfs -l +100%FREE
resize2fs /dev/mapper/vgnfs-lvnfs