GT I9300 clockworkmod Cyanogen 10 nightly external SD not mounting I haven't played around with custom ROMs since my G1 back in 2008, so when I put Cyanogen 10 on Galaxy S3 last night I wasn't surprised that things have changed a bit.

I rooted the phone first, then put on CM touch, then C10 and the appropriate gapps. 
My problem is that I can't see the ext sd that worked fine under the stock ROM.

These are the specifics:


recovery-cwm-touch-6.0.1.2-i9300 
cm-10.1-20121220-NIGHTLY-i9300
gapps-jb-20121212-signed


I'm trying to mount via the CWM menu but get this response:

Error mounting /external_sd!

I've also tried to use ICS SD Binder, but with no success.

Any help would be grand.
First to the recovery:

Samsung phones that use Odin have their recovery image as part of the kernel. You should flash the CyanogenMod zip file, and that should flash the CWM recovery. Alternatively, you could flash the Siyah kernel, which comes with a modified CWM touch recovery image.

Now to the EXT partition:

Make sure that the EXT partition is primary, and also ensure that your ROM has EXT support - you should ask on your ROM's forum post/website to check if it does. If it does, then it could be an issue with the mount script, if it doesn't well we know what the issue is now ;)