Re: [debian-knoppix] beating ghost
--- Yasar Arman <yasar.arman@waibschd.de> wrote:
> Nathaniel Sbar schrieb:
> >
> > I need some help to justify the use of GPL'd
> software
> > to my supervisor in the replacement of Norton
> Ghost.
> > So far, I've used UDPcast and by itself, it does a
> > wonderful job. The problem is that sometimes, we
> need
> > to save an image of a hard drive instead of just
> > copying one hard drive to another. We can't use
> the
> > network, so to facilitate this, we purchased an
> > external USB 2.0 hard drive. I connected the
> external
> > drive, booted off the Knoppix CD, build
> 2003-03-30,
> > started in runlevel 2, and made the following
> series
> > of commands.
> >
> > - modprobe ehci-hcd
> > - mount /dev/sdb
> > - dd if=/dev/hda | lzop > /mnt/sdb/test.lzo
> >
> > OK, I might have thrown a cd or ls in there, but
> these
> > are the important commands. The process worked,
> but
> > after about an hour of waiting, I decided to ^c.
> > About 10GB of a 20GB hard drive had been copied so
> > far. This is compared to the same drive being
> fully
> > Ghosted in about 15 minutes to a test.gho file.
> Does
> > anybody know what I can do to make dd more
> > competetive?
> >
>
> Try to turn on dma for hda KNOPPIX doesn't use DMA
> for default. At least
> I have to turn on always DMA manually for the IDE
> drives. Gives factor
> 10 the moste times!
>
> Try to check the drive speed with hdparm -t. Maybe
> you catched up the
> wrong USB Port (1.x instead of 2.x). You the system
> has definitely an
> USB 2.x Port?
>
> You can also first blank the unused space with
> zeroes (files containing
> zeroes) and then use bzip2 for compression. This
> should also give you
> some more speed.
>
> Just for comparison:
>
> when I dump an 10GB HDD (2 NTFS Partitions,
> fragmented, not zeroed,
> 80%full) this takes about 10 to 12 Minutes, whithout
> compression!
>
> regards,
>
> yasar
Thanks a lot Yasar, turning on DMA seemed to be what
did the trick.
Nate.
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