Re: Block sizes for dd(1) to USB memory sticks (flash drives) for installers for FreeBSD
Date: Sat, 01 Oct 2022 23:45:37 UTC
On 30/09/2022 17:33, Craig Leres wrote: > On 9/30/22 00:26, Graham Perrin wrote: >> <https://www.freebsd.org/releases/13.1R/announce/#_availability> and >> elsewhere: >> >> bs=1m >> >> Why so small? >> >> I find things much faster with a larger block size. Is this my >> imagination? > > I rarely use dd after learning about recoverdisk(1). But I see why dd > would be referenced in installation instructions (e.g. switching from > a linux distro). > > Craig Evidently, the difference in speed was my imagination. I found less than one second difference between these two commands: time recoverdisk -v FreeBSD-13.1-RELEASE-amd64-dvd1.iso /dev/da3 time gdd if=FreeBSD-13.1-RELEASE-amd64-dvd1.iso of=/dev/da3 status=progress conv=sync bs=10M recoverdisk(1) is a great hint. Thanks.