@Rafa,

I recommend you ssh into the device instead of running lzma through the terminal on the device itself. As qole mentioned, sometimes it can take ALOT (5 to 10 times) longer to run lzma.

Also, I would STRONGLY recommend to anyone beta testing that you not panic and turn off the device if it becomes slow or unresponsive. I did this yesterday and it resulted in a corrupted FAT in /dev/mmcblk0p1.

I noticed this after I cleaned up some old images that saw that '/du -sh /home/user/MyDocs' and 'df -h' were off by 9GB.

Luckily unmounting MyDocs and running an fsck -a -r /dev/mmcblk0p1 recovered the lost clusters.