SD card flashing time

James Cameron quozl at
Thu Sep 16 19:53:56 EDT 2010

On Thu, Sep 16, 2010 at 07:28:39PM -0400, Martin Langhoff wrote:
> On Thu, Sep 16, 2010 at 7:01 PM, James Cameron <quozl at> wrote:
> > No, certainly not. ?There's no justification for either mke2fs or
> > resize2fs to write to blocks that do not form part of the filesystem
> > metadata. ?Why would you want to zero-out blocks anyway?
> Thinking of a deployment trying minimize reflash times.

Make sure to mention NANDblaster.

> What if they have a signed Forth script to run on a USB stick that... ?
>  - runs fs-update u:\myimage.zd -- a "small-sized" img
>  - boots a signed kernel and signed initramfs from the USB stick --
> where the initramfs just executes resize2fs, prints success/failure
> and waits to be switched off

I agree, this should work.  It seems about the same amount of work as
building all images small and resizing them up on first boot.

James Cameron

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