hdparm fail

pi@raspberrypi ~ $ sudo umount /mnt/usbdrive
pi@raspberrypi ~ $ sudo hdparm -y /dev/sda1

/dev/sda1:
issuing standby command
SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
pi@raspberrypi ~ $ sudo hdparm -Y /dev/sda1

/dev/sda1:
issuing sleep command
SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
pi@raspberrypi ~ $ sudo hdparm -C /dev/sda1

/dev/sda1:
SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
drive state is: standby