On Thursday 16 May 2019 08:20:29 am andy pugh wrote: > On Thu, 16 May 2019 at 02:23, Gene Heskett <[email protected]> wrote: > > Got question on Rock64 since they came with almost zero docs, I note > > there are 3 std sized usb ports, two have white plastic inserts, > > while the single stack port adjacent to the pair has a robins egg > > blue plastic insert. Does this means it is the usb-3 port? > > Blue normally means USB-3, though typically it is a deeper blue than > the egg of a robin. > > (Way, way of topic:) > Robins'-egg blue is an interesting phrase, considering that there are > two completely different species called "Robins" > https://en.wikipedia.org/wiki/American_robin > (Very blue eggs) > https://en.wikipedia.org/wiki/European_robin > (much cuter bird, eggs are not blue at all) This is a bit more intense of a color, as the broken robins eggshell I picked out out of the grass is a noticeably paler blue that this bit of plastic. In any event I don't think a usb2 port is quite up to this: root@rock64:~# /sbin/hdparm -Tt /dev/sda
/dev/sda: Timing cached reads: 1566 MB in 2.00 seconds = 783.17 MB/sec Timing buffered disk reads: 744 MB in 3.01 seconds = 247.51 MB/sec So I think its fast enough to build linuxcnc on. So ATM my next step is blocked as no lcnc source debs seem to be available. Ahh, found it on git-hub, got the zip, copied it to the users dir on the rock64, ssh'd in as the user, launched mc, stepped on linuxcnc-master.zip and told mc to put the unzipped directory on the ssd, /media/slashafter making sure I owned it. But I have a copy speed problem, mc is doing it at about 2.5 kilobytes a second, so will take about a day to finish the unpack and copy of 78 megs. Anybody have a clue what the heck is the bottleneck? I know a .zip is slow to unpack, but this is unreal. I have to go get some ink for my big printer, about a 2 hour round trip run up the superslab, and it won't be anywhere near done when I get back. Currently estimated by mc at around 10 hours. And mc time estimates are always much less than wall time. Sheesh... Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
