This can happen if you connect a (usually laptop) hard drive that has an ATA security password set to a USB bridge that doesn't pass ATA security commands: [10060.089263] end_request: critical target error, dev sdb, sector 0 [10060.090846] sd 8:0:0:0: [sdb] Unhandled sense code [10060.090865] sd 8:0:0:0: [sdb] Result: hostbyte=0x10 driverbyte=0x08 [10060.090889] sd 8:0:0:0: [sdb] Sense Key : 0x3 [current] [10060.090911] sd 8:0:0:0: [sdb] ASC=0x11 ASCQ=0x0 [10060.090930] sd 8:0:0:0: [sdb] CDB: cdb[0]=0x28: 28 00 00 00 00 00 00 00 08 00 [10060.090980] end_request: critical target error, dev sdb, sector 0 The drive looks good on SMART, i.e. the read failure doesn't show as a bad sector and it passes a self test. The Solution is to put the drive into a laptop to remove the password.