[dundee] dd revisited

[Paul Lancaster]

Nistur wrote:
> Ok, I still haven't got quite to the bottom of this dd thing, and now 
> I have a new problem. I installed OSX to a friend's laptop, when we 
> tried getting audio to work and rebooted, the thing froze on the apple 
> logo. We reinstalled and I said I'd make a backup to her external 
> storage, forgetting that it would be FAT32 and her partition size is 
> 10GB.
> Basically, I've looked into using search and count to create 2GB 
> chunks which then (hopefully) I could put back together if her system 
> goes bust again.
> I got confused though. I managed to get the first one with:
> dd count=4194304 if=/dev/sda3 of=/mnt/usb/OSXBackup.1
> When I tried:
> dd search=4194305 count=4194304 if=/dev/sda3 of=/mnt/usb/OSXBackup.2
> it started off the filesize as 2GB. I didn't check to see whether 
> FAT32 would make later volumes, that would start at 4GB for example. I 
> just thought I should check before I make a mistake. My main concern 
> is that I overwrite the first part of the next partition when I dd it 
> back when the inevitable happens and appleazalia messes up again. I 
> also don't know how easy it would be to tar everything up as I haven't 
> yet found a liveCD that can access a hfs partition :(
>
> Thanks in advance and I'll continue googling
> Nistur
>
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>
Fat 32 will have no problems with a 10GB partition but will truncate 
file sizes at 4.0GB - hence the problems with DVD iso's.

Paul