A larger block size as lucio says, and also try two dd's with a pipe between them, one reading and one writing. dd(1) is single threaded but you have two asynchronous physical devices.
I have had good success copying sd-cards using fcp - rsc's multithreaded cp, already in the distribution, though I don't know what blocksize it uses offhand. -Steve > On 1 Mar 2024, at 09:39, Lucio De Re <lucio.d...@gmail.com> wrote: > > Increasing the dd block size (-bs 1024k or as big as the man pages > allow) could make a big difference. > > > On 3/1/24, Aleksandar Kuktin <a...@triklod.rs> wrote: >>> On Fri, 1 Mar 2024 10:08:25 +0100 >>> Marco Feichtinger <ma...@germteig.com> wrote: >>> >>>> and the computer isn't a SBC bitty box, the transfer rate is weirdly >>>> low. >>> >>> Well, both disk are on the same machine. >>> It's a Supermicro X7SPA-H-D525 board. >>> >>> -marco >> >> Well, that's not a bitty box. Wish I bought something like that instead >> of my BananaPi. Anyway, someone more knowledgeable on Plan 9 than me is >> needed. I can only speculate that the OS and hardware fight. I have >> something similar happening on my desktop with modern hardware running >> old software. I run GNU/Linux on it. For some reason I can't figure out, >> transfers start off normal but then degrade to 10 Mbps or less after a >> few GiB are transferred. If I try it with CentOS 7, it runs fine. But >> when I use my own homegrown distro it's pathologic. Kernel version >> 3.16.85, vanilla. >> >> -- >> Svi moji e-mailovi su kriptografski potpisani. Proverite ih. >> All of my e-mails are cryptographically signed. Verify them. >> -- >> You don't need an AI for a robot uprising. >> Humans will do just fine. >> -- >> > > > -- > Lucio De Re > 2 Piet Retief St > Kestell (Eastern Free State) > 9860 South Africa > > Ph.: +27 58 653 1433 > Cell: +27 83 251 5824 ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/T0fd6444acb9c7811-Mb5849711471b91fba2a419ff Delivery options: https://9fans.topicbox.com/groups/9fans/subscription
