I am using clonezilla to backup 80gb hdd. It only has 2.7 gigs worth of data on it.
It looks like clonezilla backs up the whole 80gb sector by sector which is obviously huge. I then try to compress the file it makes using any compression tool and 3 hours after it only copresses it to about 55gigs. I can also use a compression tool in clonezilla that will do it on the fly, and it makes the file about 55gigs as well.
Now my question is, why is it so large? I mean there is only 2.7 gigs of actual data on the HDD, can't any kind of rar/zip whatever make it smaller?
I had a fake ISO once when it was a 4.37 gig image file with mostly 0's in it and it compressed to 3 m3gs, while extracted it reported 4.37 gigs...
Sounds like what you're making is a physical clone...every bit on every sector of the drive. Still, one would think a smart compression program might do a better job than reducing 80GB to 55GB...esp if every unused sector was formatted or overwritten with zeros or something.
Does clonezilla not offer a logical clone capability? (or if it plans to do so, it may simply not be functional yet...I've seen some utilities actually claim functions only to find that a claimed function is still not yet actually implemented...just planned for the future)
If it doesn't, you might try HDclone...the self-booting version for an arbitrary system, or there is also a version that runs an separate app under Windows but STILL lets you clone a drive regardless of the OS used on the drive to be cloned (e.g. you can clone a Linux drive that is connected to a Windows system just for the purposes of making the backup).
The free version of HDclone may not let you do what you want, but I'd wager one of the paid versions would.
edit to add:
BTW, just to let you know, I've used the freeware version of HDclone to successfully clone an entire drive to another drive of equal or greater size...I realize but that's not what you're looking for but I'm just saying the freeware part of the functionality has been rock-solid, suggesting the rest of the claimed functionality (e.g. the "Smart" function under the "Professional" version) might be decent as well.
And the HDclone website says this, which seems like it might help you determine if your disk can be backed up in a given mode without spending any money up front...
Note- Please use the Free Edition to find out if a certain PC system and its mass storage media are supported. The Free Edition shows all supported and recognized drives, but some of them may only be usable with one of the higher editions.
i am also trying hd clone and even with all the bells and whistles enabled like smart copy, the img file is still 55 gigs. although i just checked again, on that disk im trying to backup there is only like 2 gigs worth of stuff and 70 gigs free space. its been recently full formatted too so it shouldn't have any data in the empty section
i was reading forums, ppl say it depends on the exact layout of info, like if the drive is fragmented it wont be compressed as much. Also, the HDD was never full formatted and it was previously used, so maybe there is a lot of info still on the drive that the filesystem cant see.