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-   -   Partition does not start on physical sector boundary!!?? (http://www.cfd-online.com/Forums/lounge/127064-partition-does-not-start-physical-sector-boundary.html)

immortality December 2, 2013 15:21

Partition does not start on physical sector boundary!!??
 
Hi
what does it mean?
Code:

Partition ... does not start on physical sector boundary
does it mean the partitioning have any problems?:mad::D
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


wyldckat December 8, 2013 15:04

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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