Win Svr Ent 2003 R2 ZH/ VSS Error backup fail with event VolSnap 20
Event Type: Error
Event Source: VolSnap
Event Category: None
Event ID: 20
Date: 2011-9-4
Time: 22:00:20
User: N/A
Computer: computer
Description:
The shadow copies of volume F: were aborted because of a failed free space computation.
For more information, see Help and Support Center at https://go.microsoft.com/fwlink/events.asp.
在32 bit作業系統中non-paged pool最大是256MB
There is a limitation with the 32 bit windows Server 2003 with volumes greater than 5 TB on which shadow copy is enabled (i.e on a single volume), a very basic chart is 1 TB of drive uses ~ 24MB of non-paged pool; so a 10tb drive would need 240mb
With 64-bits this isn’t an issue as the paged pool and non paged pool memory can grow to a maximum of 128GB
目前看來x86 OS的設計
目前可建議做法如下
1.重新安裝成x64版本
或是
2.將目前的F槽資料備份，磁碟分割成較小的size
其他參考資料 ：
Scalability Factors for Shadow Copies (裡面的最後一段有描述此問題 , 你的事件檢視器紀錄可以看到VolSnap Event Id 5的訊息)
https://technet.microsoft.com/en-us/library/cc755419(WS.10).aspx
Memory Management - Understanding Pool Resources