I like the idea of using btrfs. How difficult would it be to modify the script that generates the MachineKit images to use a btrfs filesystem rather than ext4? For starters I guess, how do you generate the MachineKit images and how might I do that myself?
On Friday, September 18, 2020 at 11:26:05 AM UTC-6 RobertCNelson wrote: > Wait, that's btrfs snapshots, which also works today.. > > On Fri, Sep 18, 2020, 12:01 PM John Allwine <jo...@pocketnc.com> wrote: > >> The ultimate goal here would be to be able to essentially flash a board, >> but always be able to revert to a previously installed firmware. So rather >> than always flash the eMMC, leverage a much larger microSD card that could >> have several different images and instead of ever overwriting them, >> allocate spare space to a new partition and change whatever setting is >> necessary to default to booting to that partition (and provide some >> interface for reverting to any previous one). >> >> On Fri, Sep 18, 2020 at 10:50 AM John Allwine <jo...@pocketnc.com> wrote: >> >>> Thanks Robert! I'll give it a try. It sounds like 4 different images >>> would be the limit using that strategy? Let's say I had a 256GB microSD >>> card with 10 different partitions. Any idea on what I would have to change >>> to be able to select one besides one of the first 4? >>> >>> On Friday, September 18, 2020 at 8:55:48 AM UTC-6 RobertCNelson wrote: >>> >>>> On Fri, Sep 18, 2020 at 9:47 AM John Allwine <jo...@pocketnc.com> >>>> wrote: >>>> > >>>> > Has anyone partitioned a microSD card such that it can be booted into >>>> different partitions on a Beaglebone Black or AI? How would I go about >>>> doing something like that? I'd like to avoid needing to physically take >>>> out >>>> the microSD card and potentially add bootable partitions over time. Would >>>> that be doable from the Beaglebone itself? >>>> >>>> We use "/boot/uEnv.txt" as a trigger file.. >>>> >>>> Take an existing partition, shrink it to half, (dont' touch the 4mb >>>> hole), then clone that partition to the empy space (and update it's >>>> /etc/fstab).. >>>> >>>> On startup, u-boot will search the first 4 partitions for >>>> "/boot/uEnv.txt" so either rename the one on the first partition to >>>> the boot the second/etc.. >>>> >>>> There's probably a better way, but this will just work with the >>>> existing setup with the fewest mod's.. >>>> >>>> Regards, >>>> >>>> -- >>>> Robert Nelson >>>> https://rcn-ee.com/ >>>> >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "BeagleBoard" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to beagleboard...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/beagleboard/15487b80-ad54-40df-9079-e12f60368419n%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/beagleboard/15487b80-ad54-40df-9079-e12f60368419n%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to beagleboard...@googlegroups.com. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/CAPEK9qafMH2HPHuxq%2BUETxaTR4bmD8TACDnn0zdrTTsGYekmNQ%40mail.gmail.com >> >> <https://groups.google.com/d/msgid/beagleboard/CAPEK9qafMH2HPHuxq%2BUETxaTR4bmD8TACDnn0zdrTTsGYekmNQ%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/5bb42fda-9ee0-433e-b4a7-6eeaf9b98a20n%40googlegroups.com.
