[svlug] Software Raid 1 vs straight ext3 partition

Mark msalists at gmx.net
Tue Jan 9 17:38:33 PST 2007

The main problem I have with dd is that it either 
- generates huge files or
- takes forever to compress/uncompress the files

That's why I want to use partimage. It knows what is unused space and doesn't bother wasting archiving time/space for it...


> -----Original Message-----
> From: Holt Sorenson [mailto:hso at nosneros.net] 
> Sent: Tuesday, January 09, 2007 5:19 PM
> To: Mark
> Cc: svlug at lists.svlug.org
> Subject: Re: [svlug] Software Raid 1 vs straight ext3 partition
> On Tue, Jan 09, 2007 at 05:05:29PM -0800, Mark wrote:
>  > Shifting the focus a little - assuming we would just go 
> change the type from fd to 83, take the snapshot, get 
> everything except for
>  > the md metadata at the end. Would there be a way to 
> recreate the metadata? Or would that involve having to resync 
> the two raid
>  > partitions. If so, the last time I did that it took over 1 
> full day - in the background of the running system, but still. The box
>  > was pretty slow. So at that point I might be better of 
> just using dd...
> Of the options your considering, dd is most likely to keep the data
> intact.
> However, dd isn't optimal when you have drives of different sizes (I'm
> sure you're already aware of this).
> -Holt

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