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Esata - Sata query
In message , Bill in Co
writes: Paul wrote: Bill in Co wrote: That is one weird looking connector. It will be interesting to see if I think the one on my Portégé laptop is the one shown above the one labelled laptop. this ever becomes mainstream. I think I'd prefer separate connectors, but maybe I'm being conservative and old fashioned. I think the eSata You are not alone, whatever! ones were a bit (slightly) flimsy at it is, however. The original ESATA intention was metal to metal contact and a 5000 cycle rating. The same rating as USB metal connectors. The internal SATA connector system, is plastic and the rating is 50 cycles. Although my tests in the Test machine (swapping drives all the time), is now many times over that figure. Those connector ratings are probably a "guaranteed minimum", but I don't know what "mis-mated" conditions they apply to test that out. The usage of metal barrels or surfaces for capture, makes a big difference to the spec number. Paul In retrospect, I misspoke, and was thinking of the SATA connector found on the internal SATA drive, which I thought was a bit flimsy. The eSATA connector on the end of the cable I've got looks rugged enough. Sorry! I remember back in the days of 25-way D connectors and the DIN 41612 family, there were three classes (I can't remember whether class 1 or 3 was best), which were mainly to do with how much gold plating was on the pins, rather than mechanical type of wear. The cheapest - about 50p for a D-25 - was "gold flashing", i. e. there was gold there, but really only to protect the pins from corrosion in storage while they were waiting to be assembled onto something and used; they were really intended for things that were plugged in and left in place, and rated at something like 3 to 5 insertions. Class 2 was IIRR about 0.5 to 1 micron of gold, and intended for things like circuit cards that would be replaced or moved around from time to time, and rated for a few tens of insertions. The most expensive - about 5 pounds for a D-25 - were 5 microns gold, intended for things being reconnected often; I think they were at a few hundred insertions. (For D types, there was also whether the pins were "formed" - made out of thin sheet brass, thus hollow [these worked better than you'd expect!], or "turned".) I don't _remember_ anything about the plastic housings having different number-of-mating-cycles qualities. -- J. P. Gilliver. UMRA: 1960/1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf The first banjo solo I played was actually just a series of mistakes. In fact it was all the mistakes I knew at the time. - Tim Dowling, RT2015/6/20-26 |
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