User manual

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Figure 5.4.4.1

On Linux and UNIX platform, a command named sync can be used to make the

operating system flush data from write caching into disk. For Windows platform,

Microsoft also provides a tool – sync, which can do exactly the same thing as the

sync command in Linux/UNIX. It will tell the OS to flush the data on demand. For

more detail about sync tool, please refer to:

104

http://technet.microsoft.com/en-

us/sysinternals/bb897438.aspx

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What if the snapshot space is over?

Before using snapshot, a snapshot space is needed from RG capacity. After a period

of working snapshot, what if the snapshot size over the snapshot space of user

defined? There are two different situations:

1. If there are two or more snapshots existed, the system will try to remove the

oldest snapshots (to release more space for the latest snapshot) until enough

space is released.

2. If there is only one snapshot existed, the snapshot will fail. Because the

snapshot space is run out.

For example, there are two or more snapshots existed on a VD and the latest

snapshot keeps growing. When it comes to the moment that the snapshot space is

RAG362