Hi Jagan, > Hi, > > I have created GPT table start from 8MB for kernel, roots etc. > something like > > Part Start LBA End LBA Name > Attributes > Type GUID > Partition GUID > 1 0x00004000 0x00023fff "boota" > attrs: 0x0000000000000004 > type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 > guid: c12a7328-f81f-11d2-ba4b-00a0c93ec93b > 2 0x00024000 0x00043fff "bootb" > attrs: 0x0000000000000004 > type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 > guid: 21686148-6449-6e6f-744e-656564454649 > 3 0x00044000 0x00243fff "rootfsa" > attrs: 0x0000000000000000 > type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 > guid: b921b045-1df0-41c3-af44-4c6f280d3fae > 4 0x00244000 0x00443fff "rootfsb" > attrs: 0x0000000000000000 > type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 > guid: 8da63339-0007-60c0-c436-083ac8230908 > 5 0x00444000 0x0070bfde "data" > attrs: 0x0000000000000000 > type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 > guid: 4f72ab70-69be-5948-81ff-4fc3daf24faa > > I have not included SPL, U-Boot to the partition list since it start > from 0x400 in i.MX6. So > I'm writing SPL separately using fastboot(with offset) or ums. > > But by doing this, the partition header seems overlapped so the > output looks > > GUID Partition Table Entry Array CRC is wrong: 0x6a1aba0a != > 0x8e4fd548 find_valid_gpt: *** ERROR: Invalid GPT *** > find_valid_gpt: *** Using Backup GPT *** > Part Start LBA End LBA Name > Attributes > Type GUID > Partition GUID > 1 0x00004000 0x00023fff "boota" > attrs: 0x0000000000000004 > type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 > guid: c12a7328-f81f-11d2-ba4b-00a0c93ec93b > 2 0x00024000 0x00043fff "bootb" > attrs: 0x0000000000000004 > type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 > guid: 21686148-6449-6e6f-744e-656564454649 > 3 0x00044000 0x00243fff "rootfsa" > attrs: 0x0000000000000000 > type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 > guid: b921b045-1df0-41c3-af44-4c6f280d3fae > 4 0x00244000 0x00443fff "rootfsb" > attrs: 0x0000000000000000 > type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 > guid: 8da63339-0007-60c0-c436-083ac8230908 > 5 0x00444000 0x0070bfde "data" > attrs: 0x0000000000000000 > type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 > guid: 4f72ab70-69be-5948-81ff-4fc3daf24faa > > So, what I understand is If I create the GPT first and then write the > SPL, the SPL writing process will destroy the GPT Table and if I write > SPL first and then create GPT, the GPT creation process will destroy > the SPL. > > Is there any way to fix this? I remember we can prevent this overlap > by preserving GPT Table som other or boot partition instead of having > them at the beginning by default. > > Any inputs?
On the diagram of GPT description [1] there is the info that partitions can start from LBA 34 (0x200 * 34) = 0x4400 From the above it seems like you starts from 0x4000 your boota partition, which then overwrites the "Entries 5-128" which shall be 0 and are protected by CRC written in the Primary GPT Header. Please try to adjust your partition scheme to start from 0x4400. > > Jagan. Links: [1] - https://en.wikipedia.org/wiki/GUID_Partition_Table Best regards, Lukasz Majewski -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lu...@denx.de
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