RE: [cobalt-users] hard drive 61 revisited

[Gerald Waugh <gwaugh@xxxxxxxxxxxxxxxxxxxxxxx>]

On Thu, 5 Sep 2002, William J.A. Brillinger wrote:

> At 11:59 AM 05/09/02 -0400, you wrote:
> > >  From Gerald's post:
> > >  >Just use dd, put a second drive in the RaQ and dd it once in a while,
> > >  >or dd it once and then use rsync to keep it up to date.
> > >
> > > Does this take care of all mkfs issues, or do I have to "make" a drive
> > > first? Is dd like a "real" mirroring system where it will take a drive out
> > > of the box and just do it?
> > >
> >
> >Yes, dd does a bit by bit copy, anything on one disk will be copied to
> >the other, formats and all
> >
> >dd if=/dev/hda of=/dev/hdc
> >Copies everything from a to b (this will take a while)
> >"if" is in-file and "of" is out-file
>
> What are the ramifications of doing this on an in production server?
> - Bill

Not really sure, it would be wise to do this during a scheduled
maintenace period. I have never ran a dd for the whole drive on
a server other than during a maintenance period.

You have to shut the thing down to add the second drive anyway.

Gerald
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