PowerFlex 3.0： 启用动态校验和时 SDS 崩溃

Summary: 在常规 I/O作期间，SDS 进程可能会崩溃，并在 SDS 跟踪中报告进程崩溃。

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Symptoms

当 SDC 向 SDS 发送零写入（写入 I/O，其中数据有效负载全部为零）时，可能会发生此问题。系统中启用了动态校验和。

SDS 从 MDM 断开连接，然后重新连接。“exp.0”文件显示以下崩溃字符串：

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]

影响

根据系统的状态，它可以暂时变为 DEGRADED 或 DATA_FAILED 状态。

Cause

在系统中启用动态校验和时，SDC 会计算并将校验和附加到每个写入 I/O。如果写入请求恰好是全零，则可能不会计算校验和（无效），这会触发 SDS 崩溃 - 它期望所有写入（甚至是全零写入）的有效校验和。

Resolution

禁用动态校验和机制。

Additional Information

受影响的版本
PowerFlex 3.5 及更高版本中已修复
的 PowerFlex 3.0.x

Affected Products

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