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ubuntu@ubuntu:~$ sudo parted -l

Warning: /dev/sda contains GPT signatures, indicating that it has a GPT table.

However, it does not have a valid fake msdos partition table, as it should.

Perhaps it was corrupted -- possibly by a program that doesn't understand GPT

partition tables.  Or perhaps you deleted the GPT table, and are now using an

msdos partition table.  Is this a GPT partition table?

Yes/No? Yes                                                              

Error: The backup GPT table is corrupt, but the primary appears OK, so that will

be used.

OK/Cancel? Ok                                                            

Model: ATA Hitachi HTS54505 (scsi)

Disk /dev/sda: 500GB

Sector size (logical/physical): 512B/4096B

Partition Table: gpt

 

Number  Start  End  Size  File system  Name  Flags

 

 

Error: /dev/sdb: unrecognised disk label                                  

 

Model: hp v115w (scsi)

Disk /dev/sdc: 8053MB

Sector size (logical/physical): 512B/512B

Partition Table: msdos

 

Number  Start   End     Size    Type     File system  Flags

 1      1049kB  8053MB  8052MB  primary  fat32        boot, lba