X-500 / X-55 Series Power Fail Protection
The X-500 and X-55 SSDs use an internal DRAM, but only management data is cached in the DRAM, no user data (as done in other SSDs). User data is always processed through the small internal controller cache directly into the flash chips.
Together with the user data, also the page mapping information is saved into the flash. The information in the DRAM is merely a copy of the management data for better performance.
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