Hi all, I'm studying ssd's again and wanting to buy one, even if it's small. Two fabulous contenders are the samsung 840 pro and the samsung 850 pro (soon to be released).
The 840 pro uses MLC flash and has a 5 year warranty. The 850 pro uses VERTICAL flash and has a 10 year warranty at 150 TB written or about 41 GB / day. If you do the math on a 128 GB drive, this amounts to only about 1171 program / erase cycles. For larger drives with the same rating, it amounts to even fewer p/e cycles, getting down to 150 p/e cycles for a 1 TB drive. That number is pretty appalling. The MLC flash in the 840 pro SHOULD be good for about 3000 p/e cycles, which would mean the drive can support writes of about 384 TB. TechReport has pushed one of these to over 500 TB of writes, with no unrecoverable errors, which would tend to support this theory. (I would be suspect of long term data retention with power off after that many writes though.) BUT, I haven't been able to find an endurance spec anywhere on the 840 pro. Has anybody seen any credible data on this? The tradeoff seems to be: 840 pro, potentially longer actual endurance, shorter warranty, somewhat slower performance 850 pro, potentially shorter actual endurance, longer warranty, somewhat higher performance similar prices, both support trim, both support encryption (I think) Any help is appreciated. Sincerely, Ron -- Sent from my Android Acer A500 tablet with bluetooth keyboard and K-9 Mail. Please excuse my potential brevity if I'm typing on the touch screen. (PS - If you email me and don't get a quick response, you might want to call on the phone. I get about 300 emails per day from alternate energy mailing lists and such. I don't always see new email messages very quickly.) Ron Frazier 770-205-9422 (O) Leave a message. linuxdude AT techstarship.com _______________________________________________ tech-chat mailing list [email protected] http://lists.linuxmoose.com/mailman/listinfo/tech-chat
