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Re: how to make hda become hdb?

On Fri, Nov 29, 2002 at 02:05:33AM -0500, sean finney wrote:
> hiya,
> > I have debian installed on /dev/hda, how can I switch this hard drive to
> > become /dev/hdb?
> you have to physically change the connecter on your hard drive.  ide
> goes something like this
> /dev/hda*	<-	master disk on primary ide chain
> /dev/hdb*	<-	slave disk on primary ide chain
> /dev/hdc*	<-	master disk on secondary ide chain
> /dev/hdd*	<-	slave disk on secondary ide chain
> so you need to move your hard drive from master to slave on the
> same ide chain to make it hdb.  

Which does not involve unplugging it and changing its position on the
cable, like a floppy drive does. You'll only need to do this sort of
thing if you're not happy with your current /dev/hdb becoming /dev/hda.

> also, you'll have to change the jumper settings on the hard drive too. 

Well, not "also". Just change the jumpers so that your current master
is the new slave, and the current slave is the new master. This will
exchange /dev/hda and /dev/hdb.

> if you're lucky, there'll
> be a diagram on the back of the drive that says which way you
> should put it, and if not, you'll either need your manual or
> google with the model number.

Course, if they're the same type of drive, you can simply swap the
settings. (Unless they're WDC2850s...)

> of course, this leads me to ask why you want to do this in the
> first place :)

Oh, I do stuff like this all the time. Something to do with picking up
second hand hard drives for a quid a shot, seeing which ones work and
gradually putting bigger and bigger ones in. Interestingly, you tend
to find _larger_ SCSI than IDE drives when doing this. Many thanks to
whoever mentioned Tekram SCSI cards on the list -
www.pcwebshopper.com/pcibusulwids.html is cool.


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