Bill Kenworthy <bi...@iinet.net.au> [16-01-16 11:04]: > On 16/01/16 17:27, Neil Bothwick wrote: > > On Sat, 16 Jan 2016 04:50:49 +0100, meino.cra...@gmx.de wrote: > > > >> to post a firmware image of my embedded linux computer > >> to a friend I want to size it down. > >> > >> System wise I did that already (only the really necessary > >> stuff of Gentoo plus some configuration and addons related > >> to the embedded system)...the problem comes with the size of > >> the microSDcard I use: 32 GB.... > >> > >> The microSDcard (source) has two partitions (boot + the rest). > >> The boot partition is the first partition and it is of a fixed > >> and tiny size. The second partition contains the "rest": Gentoo. > >> Currently the used space of this partition is also small. > >> > >> The image needs to be of a format, which makes > >> it possble to 'dd' it onto a microSDcard (target) and afterwards use > >> g/parted to resize/expand the second partition to the end > >> of the microSDcard to get all storage space available. > > > > Quick and kludgy. Partition an SD card of the correct size, rsync your > > data to it, then dd that card. > > > > Any other method you use will require you to have a smaller SD card to > > test the resultant image, so you may as well use that as the source and > > know it works. > > > > > > It is possible to create a dd image of the whole SD card and mount it in > a loopback to repartition etc. > > Mount it then shrink your existing file system (and probably the > partition too) to less than the required size, then recreate the dd > image to a size still less than the new sd card. > > On the new card, dd it across until it errors off, then fix/expand the > partition and then the file system. You dont care if the end is missing > as long as your data is within the size needed. > > BillK > > > Hi Neil, hi Bill,
THANKS FOR THE EXPLANATIONS! :) Will try that! Best regards, Meino
