Here is the result:
# pvesh get /storage
200 OK
[
{
"content" : "iso,rootdir,vztmpl,images",
"digest" : "21548bc295f8e3bbd14da50ebb26a93705725b64",
"maxfiles" : 0,
"path" : "/var/lib/vz",
"priority" : 0,
"storage" : "local",
"type" : "dir"
}
]
Thanks for your help