On Thu, Mar 8, 2018 at 1:58 PM, Jeff Andich <[email protected]> wrote: > Hi, > > I was needing a utility to read/clone an SD card without copying all of the > additional wasted space on an SD card like the original Win32 Disk Imager > Does. From what I can tell, the latest Etcher for Windows only writes to SD > card. > > So I just tried the latest Win32 Disk Imager which now has a checkbox, "Read > Only Allocated Partitions." With the beaglebone/beagleboard images, I > thought (in order to clone an SD card image without wasted space) for sure > that with the structure of the BeagleBone/BeagleBoard images having a single > ext4 partition and then MLO/u-boot in the "holes" below the partition > somewhere, I would have to: > > 1) upload/read just the ext4 partition, clicking the Read Only Allocated > Partition checkbox with Win32 Disk Imager > 2) Write that uploaded partition to the target SD card. > 3) Re-'dd' MLO and u-boot to the target SD card. > > But low and behold, I tried booting my board after step #2, and it boots > with my modified MLO.. > > Either Win32 Disk imager, when you click that checkbox, is reading from the > start of the SD card to the end of the ext4 partition (and not reading past > that point), or something else is going on. > > Why is the MLO/u-boot which reside in the "holes" copied as well? > > > Granted, I didn't google this in advance, so if this has already been > discussed somewhere, then please don't answer...
>From their readme: "Read Only Allocated Partitions - Option to read only to the end of the defined partition(s). Ex: Write a 2G image to a 32G device, reading it to a new file will only read to the end of the defined partition (2G)." My guess, it starts from zero -> end of partition... Not the start of the partition.. 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAOCHtYjqeoKfKJr2vtPr9hpbpiv5mZeJtmpZ8BpNufTtwSpD5Q%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
