PowerFlex 3.0： 啟用傳遞檢查總和時 SDS 發生錯誤

Summary: SDS 程序可能會在一般 I/O 作業期間當機，且 SDS 追蹤中會報告程序錯誤。

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Symptoms

當 SDC 向 SDS 發送零寫入（數據有效負載全部為零的寫入 I/O）時，可能會出現此問題。系統隨即啟用進行檢查總和。

SDS 與 MDM 中斷連線，然後重新連線。「exp.0」檔案顯示下列錯誤字串：

02/03 14:58:34.740139 Panic in file /data/builds/workspace/ScaleIO-Common-Job@2/src/tgt/ioh/ioh.c, line 2227, function ioh_PrepareDataAndChksmForWrite, PID 2648.Panic Expression !(((((*pReqFlags) & (0x8)) != 0) ? ((BOOL)1) : ((BOOL)0))) PANIC_ID_tgt_1497349764087.
/opt/emc/scaleio/sds/bin/sds-3.0.1000.208(mosDbg_PanicPrepare+0x135) [0x8dd885]
/opt/emc/scaleio/sds/bin/sds-3.0.1000.208(ioh_PrepareDataAndChksmForWrite+0x22d) [0x5f938d]
/opt/emc/scaleio/sds/bin/sds-3.0.1000.208(iohComb_WritePrimary+0x644) [0x5fef84]
/opt/emc/scaleio/sds/bin/sds-3.0.1000.208(ioh_Write+0x703) [0x601fe3]
/opt/emc/scaleio/sds/bin/sds-3.0.1000.208(ioh_NewRequest+0x42b5) [0x606995]
/opt/emc/scaleio/sds/bin/sds-3.0.1000.208(contNet_RecvIORequest+0x28d) [0x609a9d]
/opt/emc/scaleio/sds/bin/sds-3.0.1000.208(netRecvGroup_WaitForWork+0x38f) [0x6cec7f]
/opt/emc/scaleio/sds/bin/sds-3.0.1000.208(netRecvGroup_WaitForWorkLoop+0x18) [0x6cee08]
/opt/emc/scaleio/sds/bin/sds-3.0.1000.208(mosUmt_StartFunc+0x7a) [0x717d5a]
/lib64/libc.so.6(+0x48190) [0x7fcb84ece190]

影響

視系統的狀態而定，可能會暫時進入降級或DATA_FAILED狀態。

Cause

在系統中啟用飛行校驗和后，SDC 會計算校驗和並將其附加到每個寫入 I/O。如果寫入要求恰好是全零，則檢查總和可能無法計算 （無效），這會觸發 SDS 錯誤 - 它期望所有寫入的有效校驗和，即使是全零的寫入也是如此。

Resolution

停用傳遞中檢查總和機制。

Additional Information

受影響的版本
PowerFlex 3.0.x

修正在PowerFlex 3.5 及更新版本中

Affected Products

ScaleIO, PowerFlex Software
Article Properties
Article Number: 000185114
Article Type: Solution
Last Modified: 25 Nov 2025
Version:  6
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