Why does the first partition start at sector 34 when I choose "Guided - Use entire disk" during install?

Posted by Kent on Ask Ubuntu See other posts from Ask Ubuntu or by Kent
Published on 2012-10-12T18:49:38Z Indexed on 2012/10/12 21:48 UTC
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partitioning

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gpt

After choosing "Guided - Use entire disk" during installation I find that the first partition starts on sector 34. Why that specific sector and not the first one?

(parted) print
Model: ATA WDC WD30EZRX-00M (scsi)
Disk /dev/sda: 5860533168s
Sector size (logical/physical): 512B/4096B
Partition Table: gpt

Number  Start    End          Size         File system  Name  Flags
 1      34s      390659s      390626s      fat32              boot
 2      390660s  890660s      500001s      ext2
 3      890661s  5860533118s  5859642458s

(parted)

In case you prefer bytes as the unit:

(parted) unit B
(parted) print
Model: ATA WDC WD30EZRX-00M (scsi)
Disk /dev/sda: 3000592982016B
Sector size (logical/physical): 512B/4096B
Partition Table: gpt

Number  Start       End             Size            File system  Name  Flags
 1      17408B      200017919B      200000512B      fat32              boot
 2      200017920B  456018431B      256000512B      ext2
 3      456018432B  3000592956927B  3000136938496B

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