Have 1x WD1600JD 160GB SATA HDD inside this: Digitus USB 3.0 External Enclosure - SATA HDD 3.5" Model: DA-70577 Rev 1-0 Getting below message when device plugged in and powered on: ========================================================================= [sdd] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Nov 19 15:53:28 Eeyore kernel: [11547.426758] sd 12:0:0:0: [sdd] Sense Key : Medium Error [current] Nov 19 15:53:28 Eeyore kernel: [11547.426763] sd 12:0:0:0: [sdd] Add. Sense: Unrecovered read error Nov 19 15:53:28 Eeyore kernel: [11547.426768] sd 12:0:0:0: [sdd] CDB: Read(10): 28 00 00 00 00 80 00 00 08 00 ========================================================================= NOTE: HDD does not appear to be powering up. NOTE2: HDD Power Management Jumper (PM2) is ON (Jumpers 3-4 shorted). NOTE3: Ubuntu 10.04/USB2.0 http://wdc.custhelp.com/app/answers/detail/a_id/958/session/L2F2LzEvc25vLzEv... Getting this on USB enclosure power-off: ========================================================================= [12320.040194] [<ffffffff81012cb3>] apic_timer_interrupt+0x13/0x20 Nov 19 16:06:21 Eeyore kernel: [12320.040197] <EOI> [<ffffffff8101a67f>] ? mwait_idle+0x6f/0xd0 Nov 19 16:06:21 Eeyore kernel: [12320.040205] [<ffffffff8154566a>] ? atomic_notifier_call_chain+0x1a/0x20 Nov 19 16:06:21 Eeyore kernel: [12320.040210] [<ffffffff81010e53>] ? cpu_idle+0xb3/0x110 Nov 19 16:06:21 Eeyore kernel: [12320.040214] [<ffffffff8152cba7>] ? rest_init+0x77/0x80 Nov 19 16:06:21 Eeyore kernel: [12320.040219] [<ffffffff8184bddd>] ? start_kernel+0x36d/0x376 Nov 19 16:06:21 Eeyore kernel: [12320.040224] [<ffffffff8184b33a>] ? x86_64_start_reservations+0x125/0x129 Nov 19 16:06:21 Eeyore kernel: [12320.040228] [<ffffffff8184b438>] ? x86_64_start_kernel+0xfa/0x109 Nov 19 16:06:21 Eeyore kernel: [12320.040231] ---[ end trace 285acc4f109c4813 ]--- ========================================================================= Going to remove drive, disable power management, and try again.