Utilizing internal SD card RT-N66U

[cmcgrath5035]

I have a 32GB SD card partitioned (all ext2) as

/dev/sda1              1010.8M      1.3M    958.2M   0% /tmp/mnt/entware
/dev/sda3               493.9M      2.3M    466.1M   0% /tmp/mnt/jffsspace
/dev/sda4                27.3G     44.0M     26.2G   0% /tmp/mnt/dataspace

I plan to install entware to sda1
I would like to replace the default /jffs using onboard flash with partition sda3.
This way I presume /jffs contents would survive future upgrades and, well, 500M of 32GB is not a lot to give up from my free SD card space.

I see /tmp/etc/fstab is empty, so boot time mounts are setup elsewhere.

Or, should I load entware first and let it manage the /sda3 mount?

Thanks for any hints or pointers to "How-To", Wiki-Jffs has good info but no help this topic.

 

[RMerlin]

You can't. jffs is mounted much earlier than the USB devices, so for various functions having jffs mounted on an SD card won't work properly.

 

[cmcgrath5035]

Thanks, I guess I'll just repartition the SD and recover my 500Mb.

As you likely recognize, my SD partitions were set up following OWTRW2 threads over at DD-wrt. I gave up on them, primarily because I like (==buy) Asus hardware and could not figure out which branch might actually run, and it is not obvious Optware runs anywhere there at the moment. So here I am, delighted so far.

A related question: I unsderstand why /jffs might get wiped in a future upgrade.
Am I correct that when my ASUSwrt-Merlin new load comes up, I'll at least have basic access to my SD card? My thinking is to maybe rename the 500MB (too big, I understand) 'jffsbackups' and use it as a recovery scratchpad.and perhaps keep a copy of nvram backup there too?

A simple "Good Idea/Bad idea" sufficient.

 

[RMerlin]

Thanks, I guess I'll just repartition the SD and recover my 500Mb.

As you likely recognize, my SD partitions were set up following OWTRW2 threads over at DD-wrt. I gave up on them, primarily because I like (==buy) Asus hardware and could not figure out which branch might actually run, and it is not obvious Optware runs anywhere there at the moment. So here I am, delighted so far.

A related question: I unsderstand why /jffs might get wiped in a future upgrade.
Am I correct that when my ASUSwrt-Merlin new load comes up, I'll at least have basic access to my SD card? My thinking is to maybe rename the 500MB (too big, I understand) 'jffsbackups' and use it as a recovery scratchpad.and perhaps keep a copy of nvram backup there too?

A simple "Good Idea/Bad idea" sufficient.

The SD card is functional. I use it on my development RT-N66U to host Entware. You could make an automated backup of your JFFS partition to it.