Hi Sathya
There is a bit defined in each partition entry, in the fields *attributes*
which may be helpful to determine if this partition is bootable
Bit 0 Required Partition
If this bit is set, the partition is required for the platform to function.
The owner/
creator of the partition indicates that deletion or modification of the
contents
can result in loss of platform features or failure for the platform to boot
or
operate. The system cannot function normally if this partition is removed,
and it
should be considered part of the hardware of the system. Actions such as
running diagnostics, system recovery, or even OS install or boot could
potentially stop working if this partition is removed. Unless OS software or
firmware recognizes this partition, it should never be removed or modified
as
the UEFI firmware or platform hardware may become non-functional.
Thanks
Ranga
On Tue, Oct 1, 2013 at 9:08 PM, Galla Rao <gallagnv....@gmail.com> wrote:
> Hi Sathya
>
> I think you can try to locate Primary GPT in LBA1 through block
> IO->Readblock and check for signature in the GPT header
>
> Uefi Spec Section
> 5.3.2 GPT Header
> Signature 0 8 Identifies EFI-compatible partition table
> header. This value must contain the ASCII
> string “EFI PART”, encoded as the 64-bit
> constant 0x5452415020494645.
>
> Thanks
> Ranga
>
>
> On Mon, Sep 30, 2013 at 10:58 PM, Prakash, Sathya
> <sathya.prak...@lsi.com>wrote:
>
>> I am writing a shell tool to send some I/O to hard drives. I want to
>> remove the OS installed drives from my list of drives to work on. I used
>> to check legacy boot drives by reading the MBR and looking for boot
>> partitions. I am not able to find a way to identify the GPT based UEFI OS
>> installed disks. Any help is appreciated.****
>>
>> ** **
>>
>> Thanks****
>>
>> Sathya****
>>
>>
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