CONTAP-467410: CONTAP-467410：由于没有可用的备件但存在备用分区，Coredump 失败
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问题描述
系统发生死机事件，生成核心文件。
如 EMS 所示，节点重新启动时未保存核心文件：Tue May 20 12:42:22 +0000 [Node-01: NwkThd_01: sk.panic:alert]: Panic String: src/Protocols/StreamConnection.cpp:3126:ActivateNfsEventWaitingRewoundOp: Assertion failure. in process NwkThd_01 on release 9.16.1P3 (C)
Tue May 20 12:42:22 +0000 [Node-01: NwkThd_01: coredump.shutdown.trace:notice]: coredump shutdown times: kmod dumper start 516, panic_info set 22, sf_dumpcore sent 0, sparecore id sent 3793, fmot_outage info sent 0, disk_dump_start done 1938, coredump begin 6 (all in msec).
Tue May 20 12:42:22 +0000 [Node-01: NwkThd_01: coredump.dump.find.spare.failed:error]: No valid spare disk found
Tue May 20 12:42:22 +0000 [Node-01: NwkThd_01: coredump.dump.failed:EMERGENCY]: Dumpcore failed