Jul 10 11:36:29 localhost kernel: sdf: Unit Not Ready, sense:
Jul 10 11:36:29 localhost kernel: Current 00:00: sense key Not Ready
Jul 10 11:36:29 localhost kernel: Additional sense indicates Medium not present
Jul 10 11:36:29 localhost kernel: sdf : READ CAPACITY failed.
Jul 10 11:36:29 localhost kernel: sdf : status = 1, message = 00, host = 0, driver = 08 
Jul 10 11:36:29 localhost kernel: Current sd00:00: sense key Not Ready
Jul 10 11:36:29 localhost kernel: Additional sense indicates Medium not present
Jul 10 11:36:29 localhost kernel: sdf : block size assumed to be 512 bytes, disk size 1GB.  
Jul 10 11:36:29 localhost kernel: sdf: Write Protect is off
Jul 10 11:36:29 localhost kernel:  /dev/scsi/host2/bus0/target0/lun4: I/O error: dev 08:50, sector 0
Jul 10 11:36:29 localhost kernel:  I/O error: dev 08:50, sector 0
Jul 10 11:36:29 localhost kernel:  unable to read partition table