RE: [OT] Disk imaging (again)

[drew2@xxxxxxxxxxxx]

I can't give a lot of details right now, as I'm not in my own office,
because
I'm at an associate's office, ghosting a lab of computers. ;)

Let me assure you: Symantec (Norton) Ghost does NOT do a sector-by-sector
copy.
I do not believe that PowerQuest Imagecenter does either. I *do* know that
older versions of some imaging suites did do sector-by-sector copies - I
believe that ImageMagic (I think that's the right name) did that, as well
as
many other freeware and even commercial utilities. That has largely gone by
the
wayside, though, with drives now being huge, and reliability increasing.

That said, I remember performing several sector-by-sector copies back in
the
day. It was a rather convenient way to save yourself if a disk was failing,
as
I could typically get failing drives to image their data over to another
drive... where I could perform data recovery much easier.

Andrew Shriner

Quoting "White, Peter" <peter.white@xxxxxxx>:

>
> I'm being told that we're getting a xfer rate of 1Gb per minute via
the
> USB2/IDE connection, however, as there's 40GB going across rather than
the
> 4-8GB, it's taking 40 mins rather than 5-10. The size of the image is
not as
> important, but the time it takes to do the xfer is, as time is money,
and
> we're doing about 7,500 of these things....
>
> I'll get our guys to look into PQI - thanks.
>
> Pete
>
>    _____
>
> From: Paul Gordon [mailto:paul@xxxxxxx]
> Sent: 22 October 2004 16:59
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] [OT] Disk imaging (again)
>
>
> Hi Peter,
>
> Can't really speak for Ghost, since I tend to almost exclusively use
> Powerquest Imagecenter (sic). (PQI)
>
> However, your description of the way Ghost works surprises me
somewhat..
> I should have thought that it would be as intelligent as you describe,
-
> I'm pretty certain PQI is...
>
> I Use PQI all the time to image 10GB system partitions, which
typically
> have about 6GB used on them, and with PQI's compression turned up to
> max, I usually get image sizes around the 1.5GB-2GB size.
>
> Obviously it has the potential to look at the whole disk, since as you
> say, the data could be scattered all over it, but it sounds like you
are
> saying the software meticulously reads the whole capacity of the
> partition, whether data is there or not....
>
> PQI only copies *Used* areas of the partition, which is to say that if
I
> have 6GB of data on a 10GB partition or 6GB of data on a 200GB
> partition, both the final image size, and the time taken to create the
> image is the same.. - In each case PQI reads & writes just the 6GB
that
> is used....
> Are you saying that in your case, the 6GB of data on the 200GB
partition
> would either take longer or produce a larger image?
>
> Paul G.
>
>
>
> > -----Original Message-----
> > From: White, Peter [mailto:peter.white@xxxxxxx]
> > Sent: 22 October 2004 16:34
> > To: ukha_d@xxxxxxx
> > Subject: [ukha_d] [OT] Disk imaging (again)
> >
> >
> > Chaps
> >
> > You may remember I asked about this a while ago, and I've got
just 1
> more
> > question....the problems we're seeing with Norton Ghost (and
similar)
> is
> > that to do the disk image, it has to go through all 40Gb or 80Gb
of
> the
> > source disk, then copy the image over to the destination disk. 
The
> > problem
> > is that the source disks only have 4-8GB of data on them, so
ideally
> I'd
> > like something a bit more logical in doing the copy.  I know data
can
> be
> > scattered all over the disk, but we will get the users to do a
defrag
> > first,
> > so it shouldn't be too bad.  Does anyone have any suggestions in
terms
> of
> > a
> > good disk imaging app? We're using USB2-IDE to actually connect
the
> > drives.
> >
> > Thanks, and sorry about the OT post.
> >
> >
> > Pete
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
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