First MB

[alexchamberlain]

On the Arch image, the first MB is unused. What is the reason for this?

It is the same with the Debian image.

[asb]

You want to align your partitions to the SD card erase blocks (which are typically 1, 2, 4 megabytes). The wheezy images align partitions to 4MiB.

[alexchamberlain]

You want to align your partitions to the SD card erase blocks (which are typically 1, 2, 4 megabytes). The wheezy images align partitions to 4MiB.

I see, and you can't use the first MiB because of this? (0 is a multiple of 1, 2 and 4, right?)

What are erase blocks?

[asb]

Take a read of: http://lwn.net/Articles/428584/

You can't stick the first partition starting at 0 bytes because you need the partition table.

[alexchamberlain]

Take a read of: http://lwn.net/Articles/428584/

You can't stick the first partition starting at 0 bytes because you need the partition table.

I'd completely forgotten about the partition table! Thanks!