[Sugar-devel] Building a customized image of Sugar .100

[Gustavo Duarte]

Thanks James, I went for the easier way, got a USB FLASH and all working
fine.

Regards.




On Sun, Aug 10, 2014 at 9:31 PM, James Cameron <quozl at laptop.org> wrote:

> On Sun, Aug 10, 2014 at 12:24:38PM -0300, Gustavo Duarte wrote:
> > fiemap ioctl() failed
> > zhashfs: zhashfs.c:156: read_extents: Assertion `(fiemap != ((void *)0))'
> > failed.
>
> The FIEMAP feature is not supported on your NFS.  It isn't clear that
> it will remain unsupported; there seems ample mention of the
> combination in a quick Google.
>
> When I built the sparse .zd feature I used a pattern fill of unused
> blocks to recognise them [1], but when Daniel Drake merged this he
> used FIEMAP [2].
>
> To avoid the problem, you may either:
>
> - use eMMC or SD card,
>
> - use USB FLASH or hard drive,
>
> - use the network block device (nbd-server, nbd-client), or;
>
> - use the loopback block device (losetup) over NFS.
>
> You can also use a version of bin/zhashfs.c before the change, but you
> will also have to change how the empty image is created.
>
> References:
>
> [1]
>
> http://wiki.laptop.org/go/User:Quozl/fs-update-skip-unused-blocks#Pattern_Fill_Unused_Blocks
>
> [2]
>
> http://dev.laptop.org/git/projects/olpc-os-builder/commit/?id=bf0e0408ad49a32d733883c3bc832be0717b0298
>
> --
> James Cameron
> http://quozl.linux.org.au/
>
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