[ 5180.468262] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 5180.468268] sd 6:0:0:0: [sdb] Attached SCSI removable disk
[ 6693.770817] hfs: unable to find HFS+ superblock
[ 6924.958492] hfs: unable to find HFS+ superblock
[ 6928.563794] hfs: unable to find HFS+ superblock
[ 6932.405466] hfs: unable to find HFS+ superblock
[ 6942.562289] hfs: can't find a HFS filesystem on dev sdb.
[ 6962.214428] hfs: can't find a HFS filesystem on dev sdb.
[ 6967.198776] hfs: can't find a HFS filesystem on dev sdb.
[ 7928.482460] hfs: unable to find HFS+ superblock