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[ubuntu] How do I align partitions during installation?

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I need the starting offset of my partitions to be a multiple of 8. Is there a way to set this alignment during the installation process of Ubuntu Server 12.04? I have been looking into passing a boot parameter to partman but was wondering if there was a better way to do this?

Here is an example of a misaligned machine:

Code:

# fdisk -lu

Disk /dev/sda: 34.4 GB, 34359738368 bytes
255 heads, 63 sectors/track, 4177 cylinders, total 67108864 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xrrrrrrrrr

  Device Boot      Start        End      Blocks  Id  System
/dev/sda1  *        2048      499711      248832  83  Linux
/dev/sda2          501758    67106815    33302529    5  Extended
/dev/sda5          501760    67106815    33302528  8e  Linux LVM

Thus you can see that /dev/sda2 is the misaligned partition since 501758 is not divisible by 8. I set this installation up by selecting "use entire disk" during the partition section at installation. Is there a better option at installation time that will automatically align the partitions?

Note: I have been abstracting the system as a whole to keep things simple. Let me know if it would help to know the details of the rest of the system (cluster); it has many layers.

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