clockworkmod recovery - ROMManager does not backup my sd-ext

I am using rooted LG P500 running stock 2.3.3. Recently I partitioned my SD card using ROMManager in to three partitions (swap, ext and usb storage). I checked with Mini Partition Tool and understood that the sd-ext type is ext3. Link2SD created mount script and linked apps perfectly, releasing loads of space in memory.

To try an unofficial CM10 ROM, I backed up using ROMManager (NAndroid) and installed the unofficial CM10 ROM. While using CM10, I wiped sd-ext partition and linked few apps with belief that backup is done. Since I was unhappy with the CM10 ROM I decided to restore the backup and while doing so only I observed that my sd-ext partition contents were not backed up.

Thinking that I might not have backed up properly, I tried again to back up in restored backup of stock 2.3.3 and observed a message:

"Could not mount sd-ext. sd-ext backup may not be supported on this device. Skipping backup of sd-ext"

Had if I had noticed this message, I would not have installed the CM10 ROM at all.

Question: How can I make ROMManager to backup sd-ext partitions as well? I guess just because it was unable to mount, it just skipped sd-ext backup. When Link2SD was able to mount, what is stopping ROMManager to mount it and how can I fix it?

Info:

1. I tried this with ClockworkMod Recovery version 5.0.2.7 and ROMManager version is 5.0.2.1


2. I have seen the question "Ext4 partition clockworkmod recovery backup" and this question differs because the partition used is ext3 and was created by ROMMananger itself.

Update:

1. 
   

   I have seen this modaco forum thread and it just only helped me to come to a assumption that my present recovery version 5.0.2.7 does not support it. I will be glad to confirm it either from any authoritative source or burst the myth if some other user successfully backed up (either with 5.0.2.7) sd-ext.

   
   


2. 
   

   When I attempted to use "mount and storage -> mount /sd-ext" option in CWM recovery console, I just get "Error mounting /sd-ext!" message.

   
   

Answer

My suspicion that ROM Manager doesn't support sd-ext backup is quite confirmed with my experience. While looking for alternatives, I understood that there are these three recoveries available:

1. Clockwork Mod recovery (CWM)


2. Amon Ra recovery


3. TeamWin recovery (TWRP)

I tried the TWRP 2.2.2.1 from its XDA thread and I am glad to inform that it did back up my ext3 partition. Other than this benefit, I have a touch interface which is much easier in par with CMW's user interface.