Hello,
I've got a harddisk with a GPT and different partitions on it.
Now I want to get the GUID of every partition (because I'm looking for a
specific GUID).
I tried it that way:
// Get all BlockIO-protocols
Status = gBS->LocateHandleBuffer(
ByProtocol,
&gEfiBlockIoProtocolGuid,
NULL,
&Count,
&Handle);
// Loop through it
for( i=0; i<Count; i++ )
{
Status = gBS->HandleProtocol(Handle[i],
&gEfiBlockIoProtocolGuid, &BlockIo);
if (!BlockIo->Media->LogicalPartition)
continue;
Size=sizeof(GPT_HEADER);
AdjustBufferSize(BlockIo, &Size);
// Allocate memory to hold the data GPT header
Status = gBS->AllocatePool(EfiBootServicesData, Size, &Gpt);
// Read primary GPT
BlockIo->ReadBlocks(BlockIo, BlockIo->Media->MediaId, 1,
Size, Gpt);
// Right now I should get a good value for
Gpt->NumberOfPartitionEntries
// but that is not the case.
// In most cases Gpt->NumberOfPartitionEntries is empty and
the only other value
// is far too big to be the actual number of partitions
// All other entries in the Gpt structure have the same
disturbing values.
}
I had a look here:
http://feishare.com/efimail/messages/20101023-0646-Re__edk2__Need_pointers_o
n_how_to_handle_GPT_disk_in_EDK2-Andrew_Fish.html
And I think I've done it exactly as suggested. What am I missing?
Thank you.
Regards,
Michael
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