-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 What's up Ron! I think I have a 840 in my big laptop. Reading your questions reminded me of a test I had read about. I think this is the link for it. http://techreport.com/review/26058/the-ssd-endurance-experiment-data-retention-after-600tb
Have a safe holiday weekend On 07/06/2014 08:00 AM, [email protected] wrote: > Send tech-chat mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.linuxmoose.com/mailman/listinfo/tech-chat or, via > email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more > specific than "Re: Contents of tech-chat digest..." > > > Today's Topics: > > 1. anybody know endurance rating of samsung 840 pro ssd? (Ron > Frazier (TECHC)) > > > ---------------------------------------------------------------------- > > Message: 1 Date: Sat, 05 Jul 2014 11:25:53 -0400 From: "Ron > Frazier (TECHC)" <[email protected]> To: Tech Chat > List <[email protected]> Subject: [tech-chat] anybody know > endurance rating of samsung 840 pro ssd? Message-ID: > <[email protected]> > Content-Type: text/plain; charset=UTF-8 > > 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 > > > End of tech-chat Digest, Vol 9, Issue 1 > *************************************** > -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJTuXwHAAoJEO3lEi5rdGxQE7oH/1PKcKWr22TRJ2rYuHV8+pLw s1gF7H1QRJKpKn9e4/FbkWaWgysxkCAyRfQluBnCRw2cYYA91PKFQrFqA8CJ8LkW UqbHSog27F3cHRM1bjcpsIP5E1V1XxJ9E3czSOksyAvqVB1CHb8vQDML1Vcx5n9S ofCXrAIumQenugPvnRL/fdI78imKJtY25BIIw12w+Je8bN1woJBXFltA1C6vkJUz C1LG8x/xn0BYfzxdpCIuj9D2A+DSzjGIz3RP37Hm8u/arlBFOePI9NYWE8DvQf/D AHtmWhaGRDKCoSW5PkM7SOoqaDHZjg5sJEvhx85eF9S7GFIDge/jVtxp/nXaolE= =nxqz -----END PGP SIGNATURE----- _______________________________________________ tech-chat mailing list [email protected] http://lists.linuxmoose.com/mailman/listinfo/tech-chat
