Hi, we encounter a problem that a disk is blocked forever, the key log is: mpt2sas0: TEST_UNIT_READY: handle(0x000a), lun(0) mpt2sas0: TEST_UNIT_READY: handle(0x000a), lun(0) mpt2sas0: Spinning up disk.... handle(0x000a), lun(0) mpt2sas0: TEST_UNIT_READY: handle(0x000a), lun(0) mpt2sas0: Spinning up disk.... handle(0x000a), lun(0) mpt2sas0: TEST_UNIT_READY: handle(0x000a), lun(0) mpt2sas0: Spinning up disk.... handle(0x000a), lun(0) sd 2:0:1:0: device_blocked, handle(0x000a) looking into the driver code, it seems that the device is blocked by function _scsih_block_io_to_children_attached_directly() in mpt2sas/mpt2sas_scsih.c with reason_code == MPI2_EVENT_SAS_TOPO_RC_DELAY_NOT_RESPONDING, what does this reason_code mean please? when should it be returned? and any way to handle it? Best Regards, spren 2013-01-26 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html