Re: Help with memory disk

[roberto%redix.it@localhost]

Hi Gan,
First,  I've submitted some mail on netbsd-help mailing list, and someone 
on it redirect me to tech-embedded.

Ok I've already red about mount_mfs() and it works as you described.

But I cannot use mount_mfs() simply becouse I do not have any swap (or 
other writable) partition on disk. So I 'm try to use md.

Actually I want to use flash memory as hard disk, and mount it as read only 
root disk; the memory disk, mounted read-write, will be used for /var, 
/dev/ and /tmp.

Thanks for your answer,
Roberto

--On Monday, May 26, 2003 00:27:32 -0400 Gan Uesli Starling 
<alias%starling.us@localhost> wrote:

> roberto%redix.it@localhost wrote:
> > I'd like to setup a ramdisk (on netbsd 1.6 GENERIC) for temporary files,
> > without any file image and real disk device (eg. swap partition, so I
> > prefer to not use mount_mfs).
> >
> > As suggested I'm using md and mdconfig:
> >
> > 1) I've 2 device in /dev:
> > md0a b 17, 0
> > md0d b 17, 3
> >
> > (a first question: what is the means of these device?)
> >
> > 2) to create a 8 MB of ramdisk I run: "mdconfig /dev/md0a 9192 & "
> >
> > 3) before I can mount it I should create a file system with newfs; is it
> > correct?
> >
> >
> > Thanks in advance,
> > Roberto
>
> I did not see where anybody answered your question.
> I just did 'man mount_mfs' and played around with
> it. It seems to work pretty simply. I do like
> below as root...
>
> baal: {1} mkdir /foo
> baal: {2} mount_mfs -s 32m swap /foo
> baal: {3} cp /spare/jpg/x15.jpg /foo
> baal: {4} ls /foo
> x15.jpg
> baal: {5} umount /foo
> baal: {6} ls /foo
> baal: {7}
>
> ...so it is not very complex, apparently.
>
> Later,
>
> Gan
>
> --
>
>   Mistera Sturno - Rarest Extinct Bird
>
>   <(+)__       Gan Uesli Starling
>    ((__/)=-    Kalamazoo, MI, USA
>     `||`
>      ++        http://starling.us



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