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OESF Forums > Distros, Development, and Model Specific Forums > Distro Support and Discussion > Sharp ROMs
xamindar
I'm getting the itch to mess around with some other distros out there for my c3100 but I do not want to lose the exact setup I have now. I am using the original sharp rom heavily customized to exactly my needs. So I want to know what you guys out there recomend to do to back it up so that if I want to go back to it I can restore it completely as if nothing had happened.

I am thinking first of all to go into the D+M menu and use the tool in there to backup the internal 4gig drive onto an external 8gig cf I have...then do a NAND backup. But that leaves the actual installed and currently running os in flash...how do I back that up? A NAND is just a backup of the original rom as if I reformated back to factory defaults right? Or does it backup EVERYTHING?

Or, can I just dd the whole thing onto my f card? But that leaves the trouble of how do I restore it.

Thanks for any help...I hope to eventually get a dual boot setup so I can have a more modern os on my zaurus for doing certain things and then still be able to go back to my old sharp rom for the japanese/pim/music stuff I have come to love on the zaurus.
xamindar
It looks like a NAND backup copies everything except the internal hard disk. Is that right? If so then all I need to do is backup the NAND and the internal hard drive and that would work?
the_oak
Not sure if C3100 nand backup is the same, but back when I tried Guylhem's SL-6000L ROM, his nand image completely overwrote the factory internal nand ROM image, including changing the partition sizes. (Don't know if this helps or not.)
Capn_Fish
If you do a NAND backup, and dd your microdrive somewhere (tarring it up may work as well, so long as you preserve permissions), you'll be good to go.
the_oak
QUOTE(Capn_Fish @ Jun 27 2008, 10:02 AM) *
If you do a NAND backup, and dd your microdrive somewhere (tarring it up may work as well, so long as you preserve permissions), you'll be good to go.


To add to that, make sure that the card you back up to is not FAT or VFAT, as these will NOT preserve permissions. (Learned that the hard way trying to make an exact copy of an ext2 2 GB card to move to a 4 GB (VFAT) card, just using copy and paste. dry.gif )
xamindar
QUOTE(the_oak @ Jun 27 2008, 11:06 AM) *
QUOTE(Capn_Fish @ Jun 27 2008, 10:02 AM) *
If you do a NAND backup, and dd your microdrive somewhere (tarring it up may work as well, so long as you preserve permissions), you'll be good to go.


To add to that, make sure that the card you back up to is not FAT or VFAT, as these will NOT preserve permissions. (Learned that the hard way trying to make an exact copy of an ext2 2 GB card to move to a 4 GB (VFAT) card, just using copy and paste. dry.gif )


hmm, I used the D+M menu to do a backup of the internal hard drive as well and it looks like it copied everything exactly as it is on the internal drive...all three partitions and everything. So that looks cool. I just hope it restors properly
Capn_Fish
I didn't know you could do a D+M backup of the MD. Neat!
xamindar
dang, i tried to restore my nand but it keeps saying "format error". what could cause this? i ended up downloading a different nand online and it worked. but then i tried uboot again and it failed again. now even the nand i downloaded gives that same "format error". so is my original nand backup useless and i lost everything?

also, why would the downloaded nand work once but not the next time?

and, whats up with uboot? every time i flashed it my z becomes "dead". i can sometimes manage to get to the emergency console but it doesnt come up most of the time. and no matter what i do uboot doesnt do anything or come up at all.
Capn_Fish
Does the NAND backup you're trying to restore have uBoot installed (did you have uBoot when you made the backup)?
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