On Sat, Jul 29, 2000 at 12:47:20PM -0700, Dave Lers wrote:
> On Sat, 29 Jul 2000, Brian T. Schellenberger wrote:
> > Dave Lers wrote:
> > > > = ----- Original Message -----
> > > > = From: "fasi74" <[EMAIL PROTECTED]>
> > >
> > > > = > I want to copy my whole harddrive including MBR & all operating systems
> > > > = > present on that drive.
> > > > = > On an harddrive that is not as same as this harddrive in capacity.
> > > > = > is there some software like this ?
>
> > > A simple
> > >
> > > dd if=/dev/hda of=/dev/hdc
> > >
> > > works great, super backup method, all you need to do is swap drives
> > > (plug hdc in where hda was). You want both drives as master, 1 per
> > > channel. The drive you are writing to needs to be the same size or
> > > bigger.
>
> > you would want to copy off the first xx bytes
> > someplace safe and copy them back in case they contain drive geometry
> > (some drives store this _on_ the drive).
>
> Any modern drives that do this? E.g.? If this is a real concern
> (must be pretty rare as I've never seen it mentioned in dd disk
> mirroring discussions) he could still dd the whole drive if he took
> the precaution of backing up the first xx bytes off the disk being
> copied to. I thought drives were pretty flexible/forgiving, I've
> temporarily made a 6.4 gig drive into a 16meg drive with totally
> wrong settings in bios and it worked fine.
I would think this would be a non-issue. All modern IDE and SCSI drives
write lots of information to the hard drive. But they write it to
locations that the firmware absolutely WILL NOT let you get to
directly. Maxtor used this trick way back when I was working on SCSI
drives there.
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