The reason the list contains SAS controllers is because they are just as good as an option as SATA controllers: many of them are as inexpensive as SATA controllers (even though they target the enterprise market), they are fully compatible with SATA 3Gbps and 6Gbps disks, and they support all the usual features: hotplug, queueing, etc.A SAS controller typically present SFF-8087 connectors, also known as internal mini SAS, or even i PASS connectors.No commitment taken to produce Proposal: Marketing proposal for customer feedback.No commitment taken to design or produce NRND: Not Recommended for New Design.Intel and Silicon Systems (acquired by Western Digital in 2009) used the term write amplification in their papers and publications as early as 2008.
Because flash memory must be erased before it can be rewritten, with much coarser granularity of the erase operation when compared to the write operation, the process to perform these operations results in moving (or rewriting) user data and metadata more than once.
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