Reading Data From Flash Cache - IBM N series Hardware Manual

12.3.4 Reading data from Flash Cache

When the data is stored in the module, Data ONTAP can check to see whether the data is
there the next time it is needed, as shown in Figure 12-5.
Figure 12-5 Read request with Flash Cache module installed
When the data is there, access to it is far faster than having to go to disk. This process is how
a workload is accelerated, as shown in Figure 12-6.
Data in Module?
Not in Module?
Need Space in Read from Module
System Memory?
Read from Disk
Figure 12-6 More storage for WAFL extended cache
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Chapter 12. Flash Cache