I am using Ubuntu 12.04 LTS (Precise) and I have not had backup problems before now. I usually boot from a Clonezilla Live CD and image the part of my drive devoted to Linux, then store it on an external drive. I am currently using the Clonezilla Alternate Live 20140114 (saucy) version. The disk imaging started out fine with a couple of Xandros partitions and an old Ubuntu partition imaged, but when it got to "sdb3", my 41 Gb current Ubuntu boot partition, there was a big problem. It started the bitmap, but when it got to about 98%, it quit with a message something like "5,000,000 free". It was over 5,000,000, but I don't recall the exact number. It would not image the boot partition by itself either.
I don't know what all this means. I have used Ubuntu for a number of years, but outside of some fairly simple things, I am pretty much a newbie. I am not comfortable with a terminal and prefer using a GUI. I checked the partition with GParted, and it doesn't seem to see anything glaringly wrong with it. sdb3's mount point is /, and it is flagged as boot. 21.21 Gb are used and 19.80 Gb are unused. The first sector is 438285330 and the last is 524297339. Total sectors = 86012010.
I thought about having Clonezilla use fsck before imaging, but this is my boot partition, so I'm a bit afraid of doing it. I tried using System Rescue CD, but I was not knowledgeable enough to use it well. Partimage gave me the same result as Clonezilla.
As a last resort, I used the Ubuntu Backup application to save most of the files in the partition to a 32 Gb flash drive. That is an OK work-around, but I would really prefer to have a whole partition image or whole disk image for restoration purposes (should that ever become necessary)
I would be most grateful for any help the forum community can give me.
Angela C. Murphy