DS4200 Flash/Volume Copy - 41Y0738
IBM FlashCopy is designed to provide a point-in-time copy of a logical drive. Using a pointer-based
repository system, FlashCopy is designed to manage up to four copies of a logical drive. Upon the receipt of
a FlashCopy command for a logical drive, called the base logical drive, the storage system initiates the
creation of a new logical drive whose contents reflect all the data at the time of the FlashCopy command.
As I/O continues to the base logical drive, all writes to the base logical drive cause a movement of the
old data to the underlying repository to preserve the point-in-time copy of data. Any reference to the
FlashCopy logical drive will access the base volume for data unchanged since the FlashCopy command and
will access the repository for the older unchanged data if the base logical drive’s data has been changed.
VolumeCopy is designed to extend the replication functionality of IBM TotalStorage DS4000 series storage
systems by providing the ability to copy the contents of one volume to another. This feature is completely
implemented within the storage system and does not rely on host or application resources. Unlike
FlashCopy, a volume copy is the exact same size (or larger) as the original. VolumeCopy would follow a
point-in-time FlashCopy of the logical drive. The two tools are designed to allow the creation of a complete
point-in-time copy or clone of a base volume, with minimal impact on the base volume. This clone can
help provide additional protection from some classes of failures and can also be used for the uses listed
above.
DS4200 Flash/Volume Copy - 41Y0738
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Compatibility Notes
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IBM System Storage DS4200 Model 7V
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Contents
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Flash / Volume Copy
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Returns Policy
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Due to manufacturer restrictions, all sales on this item are final.
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Warranty - Labor
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N/A
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Warranty - Parts
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N/A
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DS4200 Flash/Volume Copy - 41Y0738
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