Slow RAID performance for Samsung EVO's

performance ssd storage raid

Samsung 850 EVO are consumer SSDs, lacking powerloss protected write back cache. So, the RAID controller will disable the SSD private cache, which is critical to extract good performance from consumer flash drive.

To restore performance you had to re-enable the disk cache, which can however impact data resilience against a sudden power loss.

You can see here for more information.

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