On 07/15/2017 09:28 PM, Torbjorn Jansson wrote: > On 2017-07-15 16:50, Alberto Bursi wrote: >> >> Since I don't know enough C to add GPT to the current binary tool used >> to make the mbr for the images, I am experimenting with dumping the main >> GPT partition table (first 2-ish MB) from a drive formatted like the >> target image, then assemble the image with dd like is done for sdcard or >> x86 images. >> > > I'm no expert on GPT but doesn't GPT also store some things at the end > of the disk too? > > The reason i ask is because I'm sure i once ran into problems with > that when changing from GPT to MBR using tools that wasn't fully GPT > aware and knew how to clear GPT. > i think i ended up with an MBR partition layout but with GPT leftovers > and some tools complained.
Yes, GPT stores a backup partition table at the end of the disk. Since it's a backup, the system works fine without if there is a primary partition table that works fine. It can (and should) be re-created easily on first LEDE boot by using Gdisk tool and a startup script. The fact that most MBR tools don't delete the backup table can also be seen as a feature, as it allows easy recovery of the partitions in the disk if it was handled wrong and the primary table got hosed. -Alberto _______________________________________________ Lede-dev mailing list Lede-dev@lists.infradead.org http://lists.infradead.org/mailman/listinfo/lede-dev
