SSD Cache
189
3.
The requested data is returned to the host. And the system will check whether the
requested data is hot data.
4.
If it is, the SSD cache is populated.
INFORMATION:
The actions that read data from the HDD and then write to the SSD are
called populating the cache. For more information, please refer to the
chapter 10.2.5,
Read Data with Cache Hit
The following figure shows how the controller handles a host read request when the data is
in the SSD cache.
Figure 10-7
Read Data with Cache Hit
These steps are:
1.
A host requests a read data. The system finds that the data is in SSD cache, so it is
called cache hit.
2.
Data is read from the SSD cache.
3.
The requested data is returned to the host.
4.
If there is an SSD cache error, data is read from the HDD volume.
Write Data in SSD Read Cache
Содержание XCubeSAN XS5224D
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Страница 327: ...Support and Other Resources 305 Figure 15 1 Download Service Package in the SANOS UI...
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