PowerStore：PUHC failed - The system encountered unexpected backend errors.請聯絡支援部門。(0xE0101001000C)

在 PowerStore 作業系統代碼升級期間，升級前執行狀況檢查失敗

在 PowerStore 節點日誌記錄中記錄了以下原因

Sep 28 22:56:54.847708 ASSET-A control-path[124493]: 2021-09-28 22:56:54.847 [NDU] [INFO] [com.emc.cyclone.contexts.infrastructure.ndu.application.NDUCommonUtil.ApplianceUpgradeUtil|vert.x-eventloop-thread-0] [72fee6ed-bc69-47f6-a4e3-05d8ac9deb1d|9b3b14a3-e90d-4fee-914d-1ac253b28bb1|fetchApplianceSessionInfo] Platform request to fetch appliance session id completed successfully1
 Sep 28 22:56:54.847772 ASSET-A control-path[124493]: 2021-09-28 22:56:54.847 [NDU] [INFO] [com.emc.cyclone.contexts.infrastructure.ndu.application.NDUCommonUtil.ApplianceUpgradeUtil|vert.x-eventloop-thread-0] [72fee6ed-bc69-47f6-a4e3-05d8ac9deb1d|9b3b14a3-e90d-4fee-914d-1ac253b28bb1|fetchApplianceSessionInfo] Is rollback failed state on the appliance upgrade session is null
 Sep 28 22:56:54.954970 ASSET-A control-path[124493]: 2021-09-28 22:56:54.954 [NDU] [INFO] [com.emc.cyclone.contexts.infrastructure.ndu.application.NDUCommonUtil.AwaitResponsesFromPlatformUtil|vert.x-eventloop-thread-0] [72fee6ed-bc69-47f6-a4e3-05d8ac9deb1d|9b3b14a3-e90d-4fee-914d-1ac253b28bb1|prestageHandleResponse] Platform request completed successfully
 Sep 28 22:57:24.996368 ASSET-A control-path[124493]: 2021-09-28 22:57:24.996 [NDU] [ERROR] [com.emc.cyclone.contexts.infrastructure.services.platform.gateway.application.upgrade.service.cycloneCommandService.PrestageUpgradePackageAS|vert.x-eventloop-thread-0] [72fee6ed-bc69-47f6-a4e3-05d8ac9deb1d] 
 Prestage failed: (with error 'java.lang.Exception: 錯誤：15G free space is required.Clean up the space under /cyc_cfs and try again.

解釋
cyc_fs 檔案系統用於儲存支援材料診斷檔案，通常會自動管理這些檔案所使用的空間。在少數的罕見情況下，保留的支援材料過多，導致 cyc_fs 空間不足。

使用 PowerStore Manager GUI 或 service shell 指令檔 svc_dc 移除較舊的資料收集，以釋放 cyc_fs