Comment # 4 on bug 925564 from zhen ren

n2:/dev/disk/by-label # blkid -c /dev/null
/dev/sda1: UUID="11bad7b9-d54a-4e46-adff-090f207fede9" TYPE="swap"
PARTUUID="000739ea-01" 
/dev/sda2: UUID="1c3d1f98-1e60-464d-ac14-10196f3f3e0e"
UUID_SUB="3e5325ae-4bda-4cfd-92c2-ba20817722be" TYPE="btrfs" PTTYPE="dos"
PARTUUID="000739ea-02" 
/dev/sdb1: LABEL="multi-write_append_truncate-test"
UUID="a6302cb1-1949-4841-a465-1b7e2a7bb14b" TYPE="ocfs2" PARTUUID="eb3fdfcc-01" 
/dev/sdc1: PARTUUID="c7a37063-01" 
/dev/sdd1: LABEL="single_run" UUID="2f54a86a-e761-457a-bc9e-39aef01eb576"
TYPE="ocfs2" 

n2:/dev/disk/by-label # mount LABEL=multi-write_append_truncate-test
/mnt/shared/
mount: can't find LABEL=multi-write_append_truncate-test