RAID duplication

[maitre at ccs.neu.edu (Brad Noyes)]

Hi
Thanks for replying Mike. I would like to get this to work without the 
volumes being mounted. I'm looking to make an exact duplicate, simaler to
how ghosting works (or as i understand it to work anyway). 

Idealy i want to make a bootable linux floppy, and have it duplicate
arrays reguardless of OS and filesystem on the array. So i'm not sure if
this is even possible. Any thoughts?

Thanks,
--Brad 


On Thu, Dec 07, 2000 at 03:52:54AM -0500, Michael Bilow wrote:
> As a mounted volume?  Why not just use tar?
> 
> 	tar -cpf - -c /vol1 . | tar -xpf - -c /vol2
> 
> I'm not contending that this exact syntax will work -- I just dashed it
> off now without testing it -- but it should illustrate the concept.
> 
> You cannot really use dd to copy an exact disk array because most
> filesystems (including second extended) precomute the locations of the
> spare superblocks based upon the logical media size.  If you use dd, then
> you will mess this up and things like ext2fs can fail, even if you do
> manage to get a mountable volume.
> 
> -- Mike
> 
> 
> On 2000-12-06 at 16:22 -0500, Brad Noyes wrote:
> 
> > Hi Guys,
> > I'm trying to find a way to duplicate a RAID 5 array. I'm using the compaq 3200 smart array controller. I can setup 2 arrays on the machine, and i'm
> > looking to copy one to the other, to duplicate the array. Has anyone tried this, or know one way or another if this is possible, or have any
> > suggestions on doing this (i was thinking dd)?
> > 
> > Thanks,
> > --Brad
-
Subcription/unsubscription/info requests: send e-mail with
"subscribe", "unsubscribe", or "info" on the first line of the
message body to discuss-request at blu.org (Subject line is ignored).