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              [html]<thead><tr><td>• Ensures that the write cache between two nodes is in sync</td><td>• Caches partitioning to ensure that a slow back end cannot use the entire cache</td></tr></thead><tbody><tr><td>• Uses a destage algorithm that adapts to the amount of data and the back - end performance</td><td>• Provides read caching and prefetching</td></tr><tr><td>Combined, the two levels of cache also deliver the following functions :</td><td>• Pins data when the LUN goes offline</td></tr><tr><td>• Provides enhanced statistics for BM Tivolifill Storage Productivity Center, and maintains compatibility with an earlier version</td><td>• Provides trace for debugging</td></tr><tr><td>• Reports medium errors</td><td>• Resynchronizes cache correctly and provides the atomic write functionality</td></tr><tr><tdcolspan="2">• Ensures that other partitions continue operation when one partition becomes 100 % full of pimed data</td></tr><tr><td>• Supports fast - write ( two - way and one - way ), flush - through, and write - through</td><td>• Integrates with T3 recovery procedures</td></tr><tr><td>• Supports two - way operation</td><td>• Supports none, read - only, and read / write as user - exposed caching policies</td></tr><tr><td>• Supports flush - when - idle</td><td>• Supports expanding cache as more memory becomes available to the platform</td></tr><tr><td>• Supports credit throtiting to avoid I / D skew and offer fairness / balanced I / O between the two nodes of the I / O Group</td><td>• Enables switching of the preferred node without needing to move volumes between I / O Groups</td></tr><tr></tr><tr></tr><tr></tr><tr></tr><tr></tr><tr></tr><tr></tr><tr></tr><tr></tr><tr></tr></tbody>
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