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Diffstat (limited to 'doc/README.gpt')
| -rw-r--r-- | doc/README.gpt | 17 |
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diff --git a/doc/README.gpt b/doc/README.gpt index ac975f6..91e397d 100644 --- a/doc/README.gpt +++ b/doc/README.gpt @@ -237,6 +237,23 @@ doc/arch/index.rst: => gpt swap host 0 name othername [ . . . ] +Modifying GPT partition layout from U-Boot: +=========================================== + +The entire GPT partition layout can be exported to an environment +variable and then modified enmasse. Users can change the partition +numbers, offsets, names and sizes. The resulting variable can used to +reformat the device. Here is an example of reading the GPT partitions +into a variable and then modifying them: + +U-BOOT> gpt read mmc 0 current_partitions +U-BOOT> env edit current_partitions +edit: uuid_disk=[...];name=part1,start=0x4000,size=0x4000,uuid=[...]; +name=part2,start=0xc000,size=0xc000,uuid=[...];[ . . . ] + +U-BOOT> gpt write mmc 0 $current_partitions +U-BOOT> gpt verify mmc 0 $current_partitions + Partition type GUID: ==================== |