dir=cmdFix.Flag.String("dir","/tmp","data directory to store files")
volumeId=cmdFix.Flag.Int("volumeId",-1,"a non-negative volume id. The volume should already exist in the dir. The volume index file should not exist.")
fixVolumePath=cmdFix.Flag.String("dir","/tmp","data directory to store files")
fixVolumeId=cmdFix.Flag.Int("volumeId",-1,"a volume id. The volume should already exist in the dir. The volume index file should not exist.")