查询报错或卡住，耗时超长。
/var/log/messages日志中错误举例：
Nov 1 09:03:48 statcp1 kernel: [17707947.372126] sd 6:0:0:0: Device offlined - not ready after error recovery
Nov 1 09:03:48 statcp1 kernel: [17707947.372267] sd 6:0:0:1: [sdc] Unhandled error code
Nov 1 09:03:48 statcp1 kernel: [17707947.372275] sd 6:0:0:1: [sdc] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
Nov 1 09:03:48 statcp1 kernel: [17707947.372285] sd 6:0:0:1: [sdc] CDB: Write(16): 8a 00 00 00 00 03 be 77 41 fa 00 00 02 00 00 00
Nov 1 09:03:48 statcp1 kernel: [17707947.372313] end_request: I/O error, dev sdc, sector 16080388602
Nov 1 09:03:48 statcp1 kernel: [17707947.372378] sd 6:0:0:1: [sdc] Unhandled error code