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Installing into own partition schema for SSD?


I am new owner of an Intel SSD. After reading about the need to properly align
the partitions, logical volumes and filesystems to the SSD's erase block size
I tried to follow these recommendations[1] and install Debian (6.0.1a) into an
prepared partition scheme.

My preferred setup is a 1GB /boot partition and the rest an dm-crypt encrypted
partition with lvm on top.

How can I tell the installer to use the prepared partitions?

Alternatively I want to know how to specify the align-payload option to
cryptsetup (--align-payload=2048).


[1] Resources I use:

* http://ldn.linuxfoundation.org/blog-entry/aligning-filesystems-ssd%E2%80%99s-erase-block-size
* http://www.spinics.net/lists/dm-crypt/msg02421.html
* http://www.ocztechnologyforum.com/forum/showthread.php?54379-Linux-Tips-tweaks-and-alignment

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