On Thursday 30 Jul 2015 20:52:24 Francisco Ares wrote: > 2015-07-30 16:26 GMT-03:00 Grant Edwards <[email protected]>: > > On 2015-07-30, Neil Bothwick <[email protected]> wrote: > > > On Thu, 30 Jul 2015 20:32:05 +0200, [email protected] wrote: > > >> Firstly I want to shrink the first partition and secondly it is a > > >> plain FAT32 partition not ext-something. I did not find a > > >> "resizefat32" or similiar. > > > > > > You need fatresize, which doesn't appear to be in portage. The approach > > > when reducing a partition's size is to first reduce the size of the > > > filesystem, to slightly less than the final partition size for safety. > > > Then delete and recreate the partition, with the same starting point. > > > Finally resize the filesystem to fill the new partition. > > > > > >> What tools do I need? > > > > > > The easiest way is probably to use GParted, which does all the hard > > > work for you, just tell it the new size of the partition. It will also > > > create the second partition for you, as a bonus. > > > > I've read good things about Parted Magic: > > https://partedmagic.com/ > > > > AFAICT, it's a friendly front-end to parted (as is GParted), but also > > includes some extra abilities like cloning partitions and disks for > > backup purposes. > > > > >> (beside the way to backup the SDcard, reinitialize it, put 2 > > >> partitions on it and copy back the stuff.) > > > > > > Given that you should backup any important data before resizing any > > > filesystem, this may be the easiest method. > > > > I've had resize operations go pear-shaped on me. I haven't seen it > > often, but I wouldn't attempt a resize without a backup copy of the > > partition involved. > > > > -- > > Grant Edwards grant.b.edwards Yow! Did YOU find a > > > > at DIGITAL WATCH in YOUR > > > > box > > > > gmail.com of VELVEETA? > > Flash memory devices are tricky when you try do defrag, as there is extra > logic inside them to do the opposite: spread as much data as possible, as > to equalize the number of write operations - the main limit for flash > memory - for all sectors. > > Most defrag tools do this by reading files to RAM, reordering them, erasing > the originals from the media, then writing them again, using no direct > sector access, leaving that to the operating system. And it works on > magnetic media, as it creates empty spaces suitable for continuous files. > > So that extra logic may fool you, making you believe it worked, when it > didn't. > > Considering this, as already said, I would copy everything to another > media, set up a new partition layout, format the new partitions as desired, > then get all data back to the new layout. > > Just my 2 cents, of course. > > Good luck > Francisco
Good catch - I didn't notice it was an SDcard. Yes, defrag does not apply. -- Regards, Mick
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