[OpenWrt-Devel] Help with SysupgradeNAND

Ben Mulvihill ben.mulvihill at gmail.com
Wed Jul 9 03:58:31 EDT 2014

On Wed, 2014-07-09 at 09:02 +0200, John Crispin wrote:
> On 09/07/2014 08:42, Ben Mulvihill wrote:
> > Hello Daniel,
> > 
> > I have got SysupgradeNAND working on the BTHOMEHUBV2B with an 
> > all-ubifs rootfs, with a patch which I'll submit in another email,
> >  once I've recompiled with the latest trunk and made sure that 
> > everything is working, but in the meantime I have a question: am I
> >  right in thinking that the only type of overlay supported is 
> > squashfs + ubifs, not squashfs + jffs2 ?
> > 
> ubifs is jffs3 essentially, a jffs2 with nand awareness added ...
> correct me if i am wrong ...

At the moment, SysupgradeNAND recreates rootfs_data as 
ubifs, then after reboot, the system tries to mount it as jffs2
and generates errors. But as you said in your reply to André,
there is no particular benefit to using jffs2 instead of 
ubifs for rootfs_data. jffs2 just happens to be what is used
currently. I'll have a look at moving over to squashfs + ubifs.
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