1、手动扫描磁盘

# cd /sys/class/scsi_host/
# echo "- - -" >  /sys/class/scsi_host/host0/scan
# echo "- - -" >  /sys/class/scsi_host/host1/scan
# echo "- - -" >  /sys/class/scsi_host/host2/scan
# fdisk -l

新增一块磁盘,磁盘无法识别问题