9/22/2023 0 Comments Multidock not openingDespite specific references to mechanical drives in MultiDock literature, the tech response was that this was simply outside their envisioned use pattern. Some Thunderbolt devices had this flaw at first, others did not. My one concern, for which I wrote tech support, was that mechanical drives would fail to spin down unless a Mac was actually asleep. Years ago I would have tried a blend of mechanical and solid state drives. So I'm appropriating their use case but I'm not their use case. I instead want trayless, fanless, not particularly price-sensitive storage, with the media easily transported between locations. They're focused on a very specific use case, video editing from fast SSDs. I'm about to order a MultiDock, and eventually a second for another location. If you do not know that all of your drives are BlackMagic Certified, then it is safe to assume that they can only be used internally, and this is your problem. Motherboard manufacturers routinely distribute lists of compatibly accessories where's the BlackMagic list? I find it astonishing that I cannot find a list of BlackMagic Certified drives. Many SSDs are not designed for external use, and will create myriad problems resembling Thunderbolt cabling issues. (Their 1 TB SSDs are apparently ok in their drives.) Because I was mislead, they processed a late (partial) refund.īottom line, you can only use BlackMagic Certified drives in the MultiDock. Later, they traced myriad Thunderbolt issues to this application, noting that their web site warned against external use of 2 TB SSDs. I ordered a 2 TB SSD from OWC, on their assurance that it would work in their external enclosure. I then checked with OWC tech support, who assured me I was right. I characterized this as a "sodomy" law and thought they were bonkers. Samsung technical support told me that I could not use this drive in an external enclosure. Present but not mounted, it would cause one second delays on an iMac 5K for opening any file. I had truly bizarre problems with the 2 TB Samsung 850 EVO SSD, in an external enclosure. This leads to timing errors where volumes fail to mount on reboot, or that simulate a faulty Thunderbolt cable. This sounds ridiculous how can the inside of an external enclosure not be "internal"? The answer is that one accesses an external enclosure by entirely different protocols, which many SSDs are way too stupid to handle properly. Many SSDs are only guaranteed to work as "internal" drives. As such, it will exhibit incompatibilities one thought one was leaving behind in the 1980's. Their lesser drives are not.ĭespite faith in the idea of SATA standards, one needs to realize that an SSD is a blisteringly stupid computer. Can anyone help with this? Other World Computing notes that their OWC Mercury EXTREME Pro 6G SSD lineup (I am not allowed to post URLs) is Blackmagic Certified. I came here in search of an official list of "BlackMagic Certified" SSDs, to avoid such issues with the MultiDock. I too suspected the Thunderbolt cable, when it was in fact unsuitable SSDs. But since the MultiDock 10G uses SATA 3 (6 Gbps) based connections to the actual drives themselves, the maximum throughput possible to a single drive is even lower, usually around 500 MB/s maximum after accounting for SATA interface overhead (and could be less depending on the drive).I do not yet own a MultiDock, but I recognize exactly the constellation of symptoms described here. USB 3.1 Gen 2 bus speeds are 10 Gbps (1250 MB/s) at the interface level, but due to overhead and other issues, real world maximum performance you can expect at the port level is around 900 MB/s or so. Sometimes this is due to connection related issues and disconnecting and reconnecting the cable improves things.Įven with USB 3.1 Gen 2 speeds, things are never going to be as fast through the MultiDock 10G as with the internal SSD. I've also seen situations where USB 3 capable ports don't always negotiate USB 3 speeds (even when using a USB 3 compatible cable). For example, a lot of USB-C cables designed for charging purposes only support USB 2.0 data speeds as they lack the additional data wires internally to support USB 3 data transfers. Usually the causes of this are some kind of cable or port issue. Although USB 2.0 has a maximum interface bandwidth of 480 Mbps (60 MB/s), due to interface overhead (and a few other factors), have real world transfer speeds in the range of 35 to 40 MB/s, which seems to be inline with what you are seeing. It sounds like the MultiDock 10G is only connected to the computer using USB 2.0 speeds (480 Mbps) rather than USB 3.1 Gen 2 speeds (10 Gbps).
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