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Why the error getting when excuting the fdisk -l command in linux.

# fdisk -l /dev/sdb 

WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.
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The real limitation is that the fdisk tool in the util-linux package doesn't support GPT-type partition tables, which you can find on any disk. However, they're commonly found on disks greater than 2 GiB, because the old MBR-type partition tables don't support sizes that large.

The easiest fix is, as the error suggested, to just use the GNU Parted software instead. If you'd like to still have the old fdisk style interface, the gnu-fdisk package provides GNU Fdisk, an alternate version of fdisk that does support GPT.

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I have find it finally, as it is an simple concept. /dev/sdb has 3000GB where fidsk won't support, because it will support only upto 2000GB harddisk. Instead fdisk we have to use parted.

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