Can or Will drive extender split files under 1GB in size

• Dienstag, 25. Mai 2010 01:58

   

   
  

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  Given my understanding of the way drive extender works, it would appear that it may be possible that drive extender could split files under the 1 GB thresh hold. A simple description of the basic extender technology can be found at  http://www.diskeeper.com/blog/post/2010/05/13/Diskeeper-support-for-Vail-storage-provisioning.aspx . Just to clarify I am not a Diskkeeper client, but the information was interesting. In the description, it is quite clear that as more space is required in a share, a 1 GB chunk is added.

  What would happen in the following situation.

  The video share has 300MB free and a 700MB video file is copied to the share. Does the drive extender look ahead and find not enough space available at present?, so requesting a further 1 Gb from the pool. This would let the file be copied to the newly requisitioned 1 Gb block, which could be situated on any physical disk, thus avoiding having the file split.

  Or does it start copying to the folder and when it runs out of space request another block. This would have the potential to split the 700 MB file, unless the added block happens to be on the same physical disk.

  Adding the 1Gb to the pool prior to copying would avoid splitting the file but would leave 300MB of unused and in a movie folder situation, probably unusable space.

  Adding the extra block during the copy would save loosing 300MB of disk space but could leave a sub 1GB file split.

  Does anyone have any further information on the drive extender, that can be released, as to which, if either, of the above situations, is correct? 

  Thanks Dave