If you are using full bells and whistles 40Gb TB3 you are limited to 4 shared PCI lanes for all the NVMe's in the enclosure.
Given the price and the purpose of these PCIe storage arrays, it seems to make sense to have them on PCIe 16x cards otherwise you cannot access them at their native speeds and they might just as well use much cheaper 4xSATA/SAS hangout ng of PCIe3 4x. Tomas On Mon, Sep 21, 2020, 15:02 John Jason Jordan <[email protected]> wrote: > On Sat, 19 Sep 2020 17:06:32 -0700 > Jason Barnett <[email protected]> dijo: > > >Good luck in your parts hunting, and the reddit forum is great if you > >have the ability to wait for a deal, or as a research tool. > >https://www.reddit.com/r/buildapcsales/ > > I entered a message on Reddit, but after some time there has been no > response. I put it in a forum labeled as for Thunderbolt 3 discussion, > but that may not have been the best place. > > I'm also having a difficult time communicating with vendors of > enclosures. Evidently they're all too busy to take more orders. > > Apparently there are only two multi-bay enclosures, both with four > bays: An OWC Express 4M2, which is advertised as being able to handle > only drives up to 4TB, totaling a max of 16TB, and a Netstor NA622TB3, > which does not clearly state what size drives it will take. Neither > company has replied to my queries. > > There also exist PCIe cards that will take up to four NVMe drives, and > there are several Thunderbolt enclosures that can take up to three > cards. One such card claims that it needs 16 lanes for maximum > throughput but, of course, none of the enclosure vendors gives a clue > about how many lanes their enclosures provide. > > And for all of the above I can find no reviews or benchmarks, > although there was some discussion on Reddit about the PCIe 3x16 card. > > As for NVMe drives, there now exist 8TB drives from two different > vendors, although the prices approach $1500. And again, no reviews or > benchmarks. You can get a 2TB drive for almost exactly twice the price > of its 1TB sibling, but a 4TB drive will typically cost two and a half > times what its 2TB sister goes for. In other words, 2TB is the best > price point at this time. And prices seem rather volatile; refresh a > Newegg page 24 hours later and many prices are different. > > Still poking around. :) > _______________________________________________ > PLUG: https://pdxlinux.org > PLUG mailing list > [email protected] > http://lists.pdxlinux.org/mailman/listinfo/plug > _______________________________________________ PLUG: https://pdxlinux.org PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
