[Arm-netbook] Fwd: Notification from Dropbox

[Justin Cormack]

On Thu, Apr 19, 2012 at 5:13 PM, Gordan Bobic <gordan at bobich.net> wrote:

> Alejandro Mery wrote:
> > On Thu, Apr 19, 2012 at 17:06, Gordan Bobic <gordan at bobich.net> wrote:
> >> Weird. How big is the actual file? I would expect a reasonably
> >> minimalistic rootfs to compress down to < 150MB, which I wouldn't expect
> >> to get noticed.
> >
> > it's a dd image of a 4GB SD card
>
> That doesn't mean it should be significantly bigger than the tar ball if
> it was made cleanly. If you have a recent e2fsprogs and kernel you
> should get discard support on MMC, so a mkfs should blank all the unused
> blocks (i.e. those should all compress to not far from 0 bytes).
>
>  From there on if you only did a minimal clean install (or extracted a
> rootfs tar ball), the compressed dd image shouldn't be _much_ bigger
> than a tar ball of the rootfs.
>
> Having said that, is there a good reason why a tar ball wouldn't be more
> useful anyway? It would let people format up the SD card in a way that
> may be more suitable to that particular card (e.g. different erase block
> sizes, etc.). SD cards are sufficiently slow that every small thing like
> that helps to make the performance bearable.
>
>
There is a copy at
https://s3.amazonaws.com/download.myriabit.com/mele-ubuntu-lucid.img.lzma

I will extract the tarball as well.

Justin
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