Jan, sorry, I misundestood "TBW" definition. It's still a little bit better (1.33 DWPD) than 0.8 DWPD but much worse than I thought. So it means $0.41 per TB written for pm863 and $0.105 per TB written for sm863 which is just terrible in comparison with Intel drives.
Best regards, Vladimir Drobyshevskiy 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 Jan Schermer <[email protected]>: > I can't really comment on price, I haven't found them anywhere maybe > because they are pretty fresh but I think I read they are oem-only to sell > in complete systems. That doesn't mean they can't be bought of course. > > I was commenting on DWPD of PM863 - at 0.8 DWPD that's pretty terrible and > at least in my cluster it would die a horrible death... > Keep in mind that when you start approaching the cell lifetime you will > get a lot more CRC errors, lot more corrupted (undetectable!) sectors and > some of the errors can go undetected until another drive fails (which is > when you read the most). > And do you really want to change all the drives yearly? > I don't think this SSD is suitable for any server for storage, maybe for > OS or some read-intensive tasks... > > Jan > > > On 25 Aug 2015, at 15:26, Дробышевский, Владимир <[email protected]> wrote: > > 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 >> >> > >
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