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Enterprise SSDs usually don't use SLC caching—especially not to the extent that consumer drives do—so their sequential write speed doesn't drop much for really
by wtallis 2y ago
Enterprise SSDs usually don't use SLC caching—especially not to the extent that consumer drives do—so their sequential write speed doesn't drop much for really large/sustained writes, and doesn't have a short unsustainable burst of accepting writes quickly into a cache.
- nick__m 2y agoIn high end enterprise storage, the drive do a form of caching (SLC to TLC in background by the drive) and it also does compression and encryption. Look at the Flashcore FCM4 used in IBM Flashsystem. https://www.redbooks.ibm.com/redpapers/pdfs/redp5725.pdf https://www.redbooks.ibm.com/redpapers/pdfs/redp5725.pdf (no affiliation except that work recently aquire an IBM SAN and I am satisfied by this storage unit, it's not like a Purestorage SAN but it's fast enough)
- wtallis 2y agoIBM's drives are exactly why I said "usually don't" rather than "never". SLC caching is still not normal for enterprise drives, whereas it is now universal for consumer SSDs.