cat /proc/scsi/scsi
echo "- - -" >/sys/class/scsi_host/host2/scan
pvcreate /dev/sdd
vgextend VolGroup /dev/sdd
lvextend -l +30719 /dev/mapper/VolGroup-lv_root
fsadm resize /dev/mapper/VolGroup-lv_root
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原文：http://victor2016.blog.51cto.com/6768693/1916693