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From: pearce@dsdlmail.ee.iastate.edu
Newsgroups: comp.sys.mac.misc
Subject: Re: cloning the A/UX root partition
Summary: use 'dd'
Message-ID: <1991Apr10.174213.15173@news.iastate.edu>
Date: 10 Apr 91 17:42:13 GMT
References: <6962@rex.cs.tulane.edu>
Sender: news@news.iastate.edu (USENET News System)
Distribution: usa
Organization: DSDL/SETFourth
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In article <6962@rex.cs.tulane.edu> dejesus@bourbon.ee.tulane.edu (Francisco X
DeJesus) writes:
>
>    Is there any program out there (preferably under MacOS) that can do an
>image copy of an entire SCSI partition, from one drive to another?

sure, just use dd under A/UX.  You don't have to worry about unmounting the
root file-system, but you should probably be in single-user mode when you do it
(unless you can boot A/UX from one drive, and copy from a second drive to a
third).  The command would look something like this:

dd if=/dev/rdsk/c2d0s31 of=/dev/rdsk/c3d0s31

which would copy all of the disk at SCSI address 2 onto the disk at SCSI
address 3 - note that slice 31 refers to the entire disk, and that dd likes to
act on the 'raw' device, hence the /dev/rdsk vs /dev/dsk.  Making image disk
copies only works for drives which are exactly the same size as each other, and
that support hardware sparing, since the altblk maps would be different for
each drive.

Mike Pearce, DSDL/SETFourth System Administrator
Iowa State University Dept. EE/CprE
email: pearce@dsdlmail.ee.iastate.edu