Avamar：Exchange VSS 附掛程式備份失敗，並出現ACCESS_VIOLATION錯誤

Exchange DAG 備份可能會失敗，並出現類似以下的錯誤：
 

015/08/09-23:07:27.17499 [checksg]  ERROR: <0378> threadimpl::runthread() - Windows structured exception ACCESS_VIOLATION in threadID 12068
2015-08-09 18:07:27 avexvss Warning <0378>: threadimpl::runthread() - Windows structured exception ACCESS_VIOLATION in threadID 12068
2015/08/09-23:07:27.19099 [checksg]  ERROR: <5372> 0: RtlDeNormalizeProcessParams()+0x574 [0x7752ada4]
2015/08/09-23:07:27.19099 [checksg]  ERROR: <5372> 1: RtlDeNormalizeProcessParams()+0x4a4 [0x7752acd4]
2015/08/09-23:07:27.19099 [checksg]  ERROR: <5372> 2: OPENSSL_Applink()+0x16db1a [0x3f3bdc0a]
2015/08/09-23:07:27.19099 [checksg]  ERROR: <5372> 3: OPENSSL_Applink()+0x7c6f9 [0x3f2cc7e9]
2015/08/09-23:07:27.19099 [checksg]  ERROR: <5372> 4: CCheckSGFiles::operator=()+0xe877b [0x3f1def8b]
2015/08/09-23:07:27.19099 [checksg]  ERROR: <5372> 5: CCheckSGFiles::operator=()+0xe880f [0x3f1df01f]
2015/08/09-23:07:27.19099 [checksg]  ERROR: <5372> 6: BaseThreadInitThunk()+0xd [0x772d59cd]
2015/08/09-23:07:27.19099 [checksg]  ERROR: <5372> 7: RtlUserThreadStart()+0x21 [0x7750b981]
2015-08-09 18:07:27 avexvss Warning <5372>: 0: RtlDeNormalizeProcessParams()+0x574 [0x7752ada4]
2015-08-09 18:07:27 avexvss Warning <5372>: 1: RtlDeNormalizeProcessParams()+0x4a4 [0x7752acd4]
2015-08-09 18:07:27 avexvss Warning <5372>: 2: OPENSSL_Applink()+0x16db1a [0x3f3bdc0a]
2015-08-09 18:07:27 avexvss Warning <5372>: 3: OPENSSL_Applink()+0x7c6f9 [0x3f2cc7e9]
2015-08-09 18:07:27 avexvss Warning <5372>: 4: CCheckSGFiles::operator=()+0xe877b [0x3f1def8b]
2015-08-09 18:07:27 avexvss Warning <5372>: 5: CCheckSGFiles::operator=()+0xe880f [0x3f1df01f]
2015-08-09 18:07:27 avexvss Warning <5372>: 6: BaseThreadInitThunk()+0xd [0x772d59cd]
2015-08-09 18:07:27 avexvss Warning <5372>: 7: RtlUserThreadStart()+0x21 [0x7750b981]
2015-08-09 18:07:29 avexvss Error <10976>: ERROR: Selected writer 'Microsoft Exchange Writer' reported an error!
   - Status: 1 (VSS_WS_STABLE)
   - Writer Failure code: 0x800423f3 (The writer experienced a transient error. If the backup process is retried, the error may not reoccur).
   - Writer ID: {xxxxxx-xxxx-xxxx-xxxx-xxxxxxx}
   - Instance ID: {xxxx-xxx-xxxx-xxxx-xxxxxxx}
2015-08-09 18:07:29 avexvss Error <19211>: Exception occurred in BackupCompleteEx
2015-08-09 18:07:29 avexvss Error <13077>: Unable to complete backup.

編輯數據集以啟用選項「禁用一致性檢查（僅當 DAG 中有兩個以上的成員時建議）」

如選項名稱所示，僅當這是群集中具有兩個或更多節點的 Exchange 資料庫可用性組 （DAG） 時，才啟用此選項。  

如果這是獨立的 Exchange 伺服器，或者希望允許對 Exchange DAG 進行一致性檢查，請調整數據集中以下選項的值：

• #IOs 間停頓
• 暫停持續時間 （ms）

兩個參數的預設值均為 1000 毫秒。嘗試較低的值（如 500），並監控備份性能。根據需要向上或向下調整。