dump

[Eric "Shubes"]

betty wrote:
> thank you for your response;
> what i want the result to be is that i have an internal backup of my 
> entire drive , in case hda fails someday.
> what i would like to do is, once the whole drive (hda) is copied to hdb, 
> to periodically just do updates so that it stays a mirror of hda. is 
> that possible?  i don't plan on ever using hdb, and hdb is a large as hda.
> so if i do ;
> 
> # dd if=/dev/hda of=/dev/hdc bs=4k
> 
> as you suggested (changing hdc to hdb, of course)
> would i need to partition the drive (hdb) first??? or just format it?

Neither. Just do the command, and it'll do a bit for bit replication,
partitions and all.

> i have never booted from a live CD so i guess i have to dig one out of 
> the drawer of software, i know i have at least one, i think knoppix and 
> maybe mepis??.

Either would be fine. Anything that'll get you to a command prompt.

After you have the initial copy, you can use the rsync command periodically
to keep them in sync. I don't know the exact syntax for that off hand.
Someone else here undoubtedly does though.

> betty i
>> : Sat, 18 Nov 2006 10:05:53 -0700
>> From: "Eric \"Shubes\"" <plug at shubes.net>
>> Subject: Re: dump on to hdb
>>
>>   
>> I think that dd would be better suited.
>>
>>   
>>
>> What do you want the result to be? How do you plan to use the new and old
>> drives?
>>
>> If you want your new drive to look exactly like the old one, and the new one
>> is at least as large as the old one, you can easily do this with dd (new
>> drive is hdc in this example):
>>
>> # dd if=/dev/hda of=/dev/hdc bs=4k
>>
>> Be sure that you boot from a Live CD before doing this, as both drive should
>> not be mounted when doing this command.
>>
>>   
>  
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-- 
-Eric 'shubes'