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The following figure shows how the controller handles a host write request in SSD read
cache. The write data can also be frequently accessed data and populated into SSD cache
for next read.
Figure 10-8
Write Data
These steps are:
1.
A host requests to write data.
2.
Data is written to the HDD volume.
3.
The status is returned to the host.
4.
The SSD cache is populated if the write threshold is reached.
Write Data in Read-write Cache
The following figure shows how the controller handles a host write request in SSD read-
write cache. The write data stays in the SSD cache for a while, and will be flushed to the
HDD volume at the appropriate time.
Содержание XCubeSAN XS5224D
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