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


The shadow copies of volume F: were aborted because of a failed free space computation.

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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






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)

Memory Management – Understanding Pool Resources

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