[root@master1 ~]# cd /application/kvm_data/
[root@master1 kvm_data]# ll
total 2592776
-rw-r--r-- 1 qemu qemu 1322713088 Mar 19 11:03 gsl.qcow2
-rw-r--r-- 1 root root 1332412416 Mar 18 16:56 moban.qcow2
[root@master1 kvm_data]# qemu-img create -f qcow2 gsl_add01.qcow2 5G
Formatting 'gsl_add01.qcow2', fmt=qcow2 size=5368709120 encryption=off cluster_size=65536 lazy_refcounts=off
[root@master1 kvm_data]# ll
total 2592972
-rw-r--r-- 1 root root 197120 Mar 19 11:24 gsl_add01.qcow2
-rw-r--r-- 1 qemu qemu 1322713088 Mar 19 11:03 gsl.qcow2
-rw-r--r-- 1 root root 1332412416 Mar 18 16:56 moban.qcow2
[root@master1 kvm_data]# qemu-img info gsl_add01.qcow2
image: gsl_add01.qcow2
file format: qcow2
virtual size: 5.0G (5368709120 bytes)
disk size: 196K
cluster_size: 65536
Format specific information:
compat: 1.1
lazy refcounts: false
[root@master1 kvm_data]# pwd
/application/kvm_data
[root@master1 kvm_data]# ll
total 2592972
-rw-r--r-- 1 root root 197120 Mar 19 11:24 gsl_add01.qcow2
-rw-r--r-- 1 qemu qemu 1322713088 Mar 19 11:03 gsl.qcow2
-rw-r--r-- 1 root root 1332412416 Mar 18 16:56 moban.qcow2
[root@master1 kvm_data]# pwd
/application/kvm_data
[root@master1 kvm_data]# virsh attach-disk gsl /application/kvm_data/gsl_add01.qcow2 vdb --cache=none --subdriver=qcow2
Disk attached successfully
[root@master1 kvm_data]# virsh domblklist gsl
Target Source
------------------------------------------------
vda /application/kvm_data/gsl.qcow2
vdb /application/kvm_data/gsl_add01.qcow2
hda -
