Re: GPT Question

[Jim Meyering]

Christian wrote:
> On mer, 2011-11-09 at 00:16 +0100, Christian wrote:
>> Hi,
>>
>> I created a GPT table on a file (1 MB), using parted 2.2.
>> Looking at the hexdump seems that the CHS-start-sector of the GPT
>> partition may not be correct. Those are MBR (64 byte) partitions:
>>
>>   Status  CHS    Type  CHS     LBA start  LBA sectors
>>   00      000100 EE    FEFFFF  01000000   FF070000
>>   00      000000 00    000000  00000000   00000000
>>   00      000000 00    000000  00000000   00000000
>>   00      000000 00    000000  00000000   00000000
>>
>> CHS start bytes are HEAD: 00, SECTOR: 01 CYLINDER: 00.
>>
>> Using the formula:
>>
>> LBA = (CYL * NHEADS + HEAD) * NSECTORS + SECTOR - 1
>>
>> LBA = (0 * 4 + 0) * 32 + 1 - 1
>>
>> LBA = 0
>>
>> But the GPT header is at LBA 1 (as the LBA start field 01000000).
>>
>> This is an error or CHS values ​​are ignored?
>>
>> Many thanks!
>>
>> Christian.
>
> Parted 3.0 have this "error" too.

Thanks, but it's not an error.
That first sector is called the protective MBR.
Note the "type" of EE.

  https://secure.wikimedia.org/wikipedia/en/wiki/GPT_Disk