I've found if there are block devices involved, nothing beats dd in terms of speed, if you're within the domain that contains both devices (i.e. BBB has both the eMMC and SD card. Once a network is involved, and in my case, a wireless one, it's network bandwidth that determines the speed.
rsync is great when we're doing incremental updates, but not so much when you just need a block copy. cpio I haven't touched since the 80's ;-) any idea of the location of the images? On Sat, Oct 31, 2015 at 5:35 PM, William Hermans <[email protected]> wrote: > You pretty much have 5 options. dd, cp, rsync, tar, and cpio. But if you > want a really good discussion about whats best, you can google stuff like > "unix exchange rsync" and just read everything. I was actually reading a > post last night about rsync versus cp I think. > > Anyway, it honestly does not get any easier than rsync -a <source> > <destination> . . . But I like dd too for variou occations, as well as tar. > I've never realy used cpio but have read about it, and cp . . . well it's > not up to snuff if you ask me. > > On Sat, Oct 31, 2015 at 2:32 PM, [email protected] <[email protected]> > wrote: > >> After slapping myself a few times, that's what I ended up doing. dd'ing >> would be faster, but I was not comfortable that I'd get the options right. >> >> Next experiment... >> >> On Sat, Oct 31, 2015 at 2:35 PM, William Hermans <[email protected]> >> wrote: >> >>> Or even rsync to sdcard . . . >>> >>> On Sat, Oct 31, 2015 at 1:14 PM, Robert Nelson <[email protected]> >>> wrote: >>> >>>> >>>> On Oct 31, 2015 2:41 PM, "[email protected]" <[email protected]> >>>> wrote: >>>> > >>>> > Hi Arsi, that was my backup plan, but that's a *little* bit less >>>> efficient than a direct write to the SD card on the BBB. >>>> > >>>> > I found Robert's 2 year old eMMC-to-SD script on GitHub; wonder if >>>> that's still up-to-date. Guess I'll try! >>>> >>>> It is, but it's a little risky on old rootfs, specially prior to Sep >>>> 2014.. As we made major changes to the location of the boot loader and >>>> kernel location on disk, that summer. (Since that major change we haven't >>>> broken it.) >>>> >>>> I'd recommend, NFS/rsync backup the boot/root.. Install the 2015-07-28 >>>> image, double check the new kernel works for you. (3.8.13 based in that >>>> image). Then rsync back just the 'root'.. Double check it still works with >>>> your changes.. Then you can use the built in emmc to SD backup across. >>>> >>>> Regards, >>>> >>>> -- >>>> 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 [email protected]. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "BeagleBoard" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/beagleboard/8G61AQECz08/unsubscribe. >>> To unsubscribe from this group and all its topics, send an email to >>> [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- >> 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 [email protected]. >> For more options, visit https://groups.google.com/d/optout. >> > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/8G61AQECz08/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
