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Partition does not start on physical sector boundary!!??

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Old   December 2, 2013, 16:21
Default Partition does not start on physical sector boundary!!??
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Ehsan
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Hi
what does it mean?
Code:
Partition ... does not start on physical sector boundary
does it mean the partitioning have any problems?
Code:
ehsan@Ehsan:~$ sudo fdisk -l
[sudo] password for ehsan: 

Disk /dev/sda: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0xd41cd41c

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *          63   204796619   102398278+   7  HPFS/NTFS/exFAT
Partition 1 does not start on physical sector boundary.
/dev/sda2       409609305  3907007999  1748699347+   f  W95 Ext'd (LBA)
Partition 2 does not start on physical sector boundary.
/dev/sda4       204796620   409609304   102406342+   7  HPFS/NTFS/exFAT
Partition 4 does not start on physical sector boundary.
/dev/sda5       409609368   614389859   102390246    7  HPFS/NTFS/exFAT
/dev/sda6       614391808  1023981567   204794880   83  Linux
/dev/sda7      1023983163  1535990714   256003776    7  HPFS/NTFS/exFAT
Partition 7 does not start on physical sector boundary.
/dev/sda8      1535990778  2047998329   256003776    7  HPFS/NTFS/exFAT
Partition 8 does not start on physical sector boundary.
/dev/sda9      2047998393  2662404254   307202931    7  HPFS/NTFS/exFAT
Partition 9 does not start on physical sector boundary.
/dev/sda10     2662404318  3276810179   307202931    7  HPFS/NTFS/exFAT
Partition 10 does not start on physical sector boundary.
/dev/sda11     3276810181  3907007999   315098909+   7  HPFS/NTFS/exFAT
Partition 11 does not start on physical sector boundary.

Partition table entries are not in disk order
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Old   December 8, 2013, 16:04
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Bruno Santos
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Hi Ehsan,

I don't remember ever seeing such an error message from fdisk.

Nonetheless, a quick search online lead me to this answer: http://askubuntu.com/a/157000

If you're not able to see the page at that link, then the summary answer is simple:
Quote:
Originally Posted by http://askubuntu.com/a/157000
This line explains the warning:
Code:
Sector size (logical/physical): 512 bytes / 4096 bytes
[...]
In theory this sort of partitioning may affect read/write IO rates somewhat, depending on your drive's firmware. If you are happy with the performance now, ignore the warning, and no need to do anything.
[...]
Best regards,
Bruno
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