On Thursday 26 July 2018 03:06:31 Mark Morgan Lloyd wrote: > On 25/07/18 21:30, Gene Heskett wrote: > > On Wednesday 25 July 2018 16:15:03 Mark Morgan Lloyd wrote: > >> There are still ways of working round that sort of problem. For > >> example, you can copy an entire device using dd to capture boot > >> segments and partition layout, inspect and recreate the filesystems > >> using mkfs, then use [something] to copy files one at a time into > >> the new filesystems taking care that some bootloaders need a wakeup > >> call when a file moves. > >> > >> As far as "something" is concerned: > >> > >> dd: Sector-by-sector copy between devices and files. > >> tar: Good ol' archiver, with directory-exclude etc. options. > >> netpipes: Do a tar or dd over the LAN. > >> rsync: File-by-file copy over LAN. > >> rdist: Ditto, less well-known but with some good points. > > > > I'll have to look at that. I need dd like copies, but I don't > > want /media/slash to be anything but an empty dir in the image it > > makes. > > dd to a file, then use losetup -f -P to make the partitions in that > file mountable, mount the appropriate one and delete the stuff you > don't want.
Wouldn't the file, if put on /media/slash, it seems dd would include /media/slash in that file, and the result even if it didn't get into a recursion forever loop, would still be around 10GB bigger than media//slash, and it already has some stuff on it: pi@picnc:~ $ df Filesystem 1K-blocks Used Available Use% Mounted on /dev/root 30387788 10165868 20189152 34% / devtmpfs 468264 0 468264 0% /dev tmpfs 472584 0 472584 0% /dev/shm tmpfs 472584 6548 466036 2% /run tmpfs 5120 4 5116 1% /run/lock tmpfs 472584 0 472584 0% /sys/fs/cgroup /dev/mmcblk0p1 41322 32253 9070 79% /boot /dev/sda3 50132520 3064328 44545348 7% /media/slash /dev/sda1 1079216 4 1079212 1% /media/boot tmpfs 94520 4 94516 1% /run/user/1000 That totals quite a bit more than the 50GB available on that SSD. I need dd like to preserve the file addresses in /boot as I've read they are expected to be at fixed addresses with this boot method. Maybe it would be best if I used the resize utility to resize the / to just over whats used. I've made a copy of /home/pi/linuxcnc, so I at least have the codes I've already written backed up locally. And I've not been able to find, but haven't looked online, a man page for rdist. Now have, but bears a re-read, its nothing like a dd. -- 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>
