Alexander, Samsung says that pm863 uses Samsung's "proprietary" 3-bit MLC V-NAND, and sm863 - 2-bit MLC V-NAND. But from endurance perspective these drives don't look as worth their money (except of some read-mostly cases).
С уважением, Дробышевский Владимир Компания "АйТи Город" +7 343 2222192 ICQ# - 1921011 Аппаратное и программное обеспечение IBM, Microsoft, Eset Поставка проектов "под ключ" Аутсорсинг ИТ-услуг 2015-08-25 18:35 GMT+05:00 Alexandre DERUMIER <[email protected]>: > Hi, > > If it was me, I'll just waiting a little to see real endurance of theses > samsung drives, > because AFAIK, they use TLC memory (and I remember of all theses EVO > drives TLC memory bugs) > > But it seem that Dell use them is these new full flash array, > http://www.tomsitpro.com/articles/dell-ssd-3d-tlc-afa,1-2754.html, > so maybe they are quite ok. > > > > ----- Mail original ----- > De: "aderumier" <[email protected]> > À: "Дробышевский, Владимир" <[email protected]> > Cc: "Jan Schermer" <[email protected]>, "ceph-users" <[email protected]> > Envoyé: Mardi 25 Août 2015 15:33:37 > Objet: Re: [ceph-users] Samsung pm863 / sm863 SSD info request > > Alexandre Derumier > Ingénieur système et stockage > > > Fixe : 03 20 68 90 88 > Fax : 03 20 68 90 81 > > > 45 Bvd du Général Leclerc 59100 Roubaix > 12 rue Marivaux 75002 Paris > > > MonSiteEstLent.com - Blog dédié à la webperformance et la gestion de pics > de trafic > > ----- Mail original ----- > De: "Дробышевский, Владимир" <[email protected]> > À: "Jan Schermer" <[email protected]> > Cc: "ceph-users" <[email protected]> > Envoyé: Mardi 25 Août 2015 15:26:02 > Objet: Re: [ceph-users] Samsung pm863 / sm863 SSD info request > > Jan, thanks for the opinion! > > Do you think that 5.11 DWPD is terrible? For example, Intel S3610 has 3 > DWPD or 5475 TBW (but for 5 years, of course). > For 1.6TB Intel S3610 it means ~$0.175 per TB written. For pm863 3.84TB > the price per TB written will be ~$0.108. And more than twice capacity per > drive bay ratio. > > For sm863 1.84TB it's even better: $0.057 per TB written. Actually, it's > better than for Intel S3710 1.2TB: $0.081 per TB written for Intel. But > s3710 has better speed specs of course (the only problem that we have not > enough CPU speed for such IOPS, I think). > > I found Intel prices on http://google.com/shopping (the lowest ones) and > the only one price I was able to find for Samsung - through "Where to Buy" > on the Samsung website. > For Intel prices were: > s3610 1.6TB - $1530 ($0.96 per GB of capacity) > s3710 1.2TB - $1780 ($1.49 per GB) > > For Samsung: > pm863 3.84TB - $2328 ($0.61 per GB) > sm863 1.92TB - $1324 ($0.69 per GB) > > As far as I know these are retail products (they are listed on Samsung > Business SSD section) but they aren't avaliable in my country and Support > said nothing about timescales. > > But I belive these SSDs will be avaliable in Europe and USA soon so I > consider them as an alternative to Intel drives for the new cluster I'm > working on. The only question is real speed. > > Best regards, > Vladimir Drobyshevskiy > > 2015-08-25 16:56 GMT+05:00 Jan Schermer < [email protected] > : > > > pm863 has terrible DWPD, I wouldn't even consider it. > sm863 is better and could be worthwile > > But I think both of these are OEM-only. Or can you buy them in bulk > somewhere? > > Jan > > > > On 25 Aug 2015, at 12:18, Дробышевский, Владимир < [email protected] > > wrote: > > > > Hello! > > > > For a few months I'm looking for any news about new VNAND Samsung sm863 > \ pm863 SSDs. A couple of weeks ago it's finally appeared on the Samsung > web-site. Final specs look very interesting: > > > > sm863: up to 1.92GB, 520 / 485 mb/s sequential read / write, 97k / 29k > random IOPS, cas latency 100, warranty: 5 years and 12320 TBW, suggested > retail price $1260 (1.92TB model) > > > > pm863: up to 3.84GB, 540 / 480 mb/s sequential read / write, 99k / 18k > random IOPS, cas latency 170, warranty: 3 years and 5600 TBW, suggested > retail price $2200 (3.84TB model) > > > > So I would like to ask: has anybody got it yet and did any tests (ceph > tests preferably)? > > > > Thanks! > > > > Best regards, > > Vladimir Drobyshevskiy > > _______________________________________________ > > ceph-users mailing list > > [email protected] > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > > > > _______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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