Marck,
On Tue, 22 Oct 2002 10:32:58 -0400 Mark Meade wrote:
> Hi Brad,
>
> Your instructions look great -- well written and concise.
Thank you for taking the time to read my work and make
suggestions.
> One suggestion: the mtd modules in 2.4.18 won't work with any DiskOnChip
> devices formatted with newer revisions of the M-Sys DFORMAT utility (5.x or
> later). An earlier version (4.2 -- still available at www.m-sys.com) is
> needed to insure compatibility with 2.4.18 modules.
>
> The failure occurs when loading the nftl.o module. This issue has been
> fixed in newer versions of the DiskOnChip modules.
I will note this in the instructions. Do you know if partitioning
and formatting a DFORMAT 5.x formatted DoC with fdisk/mkfs makes
any difference? Will using GRUB eliminate this issue?
> The DFORMAT command creates one FAT partition by default, so running fdisk
> and mkfs.msdos may not be necessary.
That is what I figured. My DoC was already formatted. I will
add a note to that section to say it may not be necessary.
> Regarding the "mounting twice" problem: I tried this today (with newer
> versions of the modules), and it seems to work fine. I'm assuming that
> simply mounting the DoC twice, in two different places, is similar to what's
> going on in the root.linuxrc script; for instance:
>
> mount /dev/nftla1 /mnt/doc1
> mount /dev/nftla2 /mnt/doc2
Actually, the same partition is mounted twice like this:
mount /dev/nftla1 /mnt/doc1
mount /dev/nftla1 /mnt/doc2
If you are able to test that scenario with newer drivers than are
included with 2.4.18, I would like to hear what happens. Can you
also tell me what version of the the modules you're using.
> Also, it's possible to replace the proprietary M-Sys DoC firmware with the
> GNU GRUB bootloader. There are two compelling reasons to consider this
> option:
>
> 1) GNU GRUB is licensed under the GPL
> 2) The M-Sys firmware takes up considerably more memory than Grub
>
> Disadvantages to this option include the additional steps required to build
> and burn the Grub firmware, and also the DoC support is not yet part of the
> main Grub source tree.
>
> If anyone is interested, the procedure to do this is documented at:
>
> http://lists.infradead.org/pipermail/linux-mtd/2002-October/006166.html
It appears the linux-mtd archives are unavailable right now. At
the least I will add a link for the curious as a footnote in my
instructions. If I can make time to try it out, I will
incorporate the GRUB instructions into optional steps in the
DocBook instructions.
Thanks again, Mark.
--Brad
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