Thread: [linuxdc-dev] Re: DC NFS root filesystem

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I think you meant lin...@li...

Thanks, I have now semi-successfully gotten the DC to boot.  I used the 
ip= setting and it mounted the NFS root filesystem.  Unfortunately, it 
seems to be mounting read-only, so I get a lot of errors during the boot 
process.  The root filesystem I am using is the Debian-based one from 
ftp://m17n.org/pub/super-h/debian-unstable/superh/tar+gz/ .
I examined the files in there, and the permissions seem normal, so I 
think it's an NFS problem.  The distribution also seems to be missing a 
few files that the startup scripts are expecting.

"options" :
root=/dev/nfs mem=16M video=pvrdc:640x480-32 
nfsroot=192.168.0.3:/mnt/dcnfs \
ip=192.168.0.4:192.168.0.3:192.168.0.3:255.255.255.0:::

"/etc/exports" :
/mnt/dcnfs 192.168.0.4(rw,no_root_squash)

192.168.0.4 is the DC
192.168.0.3 is the NFS server
Hardware is listed at bottom.

Thanks for the help,
Andrew Molloy

Karl Trygve Kalleberg wrote:

>As I've not had the chance to toy around with booting NFS on the DC
>myself yet (Haven't got the BBA), I'm forwarding this to the list.
>
>However, I wouldn't think it is too different from booting with NFS 
>on an x86, which I've done a few times before, so here's my dollar's worth
>of advice (ymmv, of course):
>
>In /etc/exports, I have:
>/local/karltk/nfsboot pudding.local(rw,insecure,no_root_squash)
>
>In /etc/hosts, I have:
>192.168.1.198   pudding.local   pudding
>
>The kernel parameters I use are (on one line, remove the \):
>nfsroot=192.168.1.199:/local/karltk/nfsboot \
>ip=192.168.1.198:192.168.1.199:192.168.1.199:255.255.255.0:pudding::
>
>I've had a few problems with BOOTP and RARP on 2.4.3 and 2.4.4 (got the
>101 error below), but when I specified all IPs explicitly in the ip=
>parameter sequence, it worked.
>
>192.168.1.199 is the NFS server.
>192.168.1.198 is the NFS client.
>
>
>Hope this helps a bit, at least.
>
>Kind regards,
>
>Karl T
>
>
>--Forwarded message from Andrew Molloy <amolloy1 at stevens dash tech dot edu> --
>
>Hi,
>
>I'm trying to get my Dreamcast to run linux.  I can get it to boot 
>successfully over the broadband adapter via dcload-ip.  I've been unable 
>to mount the root filesystem via NFS though.  This could just be that I 
>can't get the syntax right in my options file, or it might be or 
>portmapper problem, but I think the problem is on the DC side since I 
>can't get it to mount from two different servers.
>
>Thanks for any help,
>Andrew Molloy
>
>
>The error on the Dreamcast (manaully typed in):
>
>Looking up port of RPC 100003/2 on 192.168.0.3
>RPC: sendmsg returned error 101
>portmap: RPC call returned error 101
>Root-NFS: Unable to get nfsd port number from server, using default
>Looking up port of RPC 10005/2 on 192.168.0.3
>RPC: sendmsg returned error 101
>Root-NFS: Unable to get mountd port number from server, using default
>RPC: sendmsg returned error 101
>mount: RPC call returned erorr 101
>Root-NFS: Server returned error -101 while mounting /mnt/dcnfs
>VFS: Unable to mount root fs via NFS, trying floppy.
>VFS: Cannot open root device "nfs" or 02:00
>Please append a correct "root=" boot option
>Kernel panic: VFS: Unable to mount root fs on 02:00
>
>my "options" file:
>root=/dev/nfs mem=16M video=pvr2dc:640x480-32 nfsroot=192.168.0.3:/mnt/dcnfs
>
>relevant parts from my ".config" file:
>CONFIG_PCI=y
>CONFIG_BLK_DEV_LOOP=y
>CONFIG_BLK_DEV_NBD=y
>CONFIG_BLK_DEV_RAM=y
>CONFIG_BLK_DEV_RAM_SIZE=4096
>CONFIG_BLK_DEV_INITRD=y
>CONFIG_PACKET=y
>CONFIG_PACKET_MMAP=y
>CONFIG_NETLINK=y
>CONFIG_UNIX=y
>CONFIG_INET=y
>CONFIG_IP_PNP=y
>CONFIG_NETDEVICES=y
>CONFIG_NET_ETHERNET=y
>CONFIG_NET_PCI=y
>CONFIG_8139TOO=y
>CONFIG_INPUT=y
>CONFIG_INPUT_KEYBDEV=y
>CONFIG_INPUT_MOUSEDEV=y
>CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
>CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
>CONFIG_INPUT_JOYDEV=y
>CONFIG_INPUT_EVDEV=y
>CONFIG_MAPLE_KEYBOARD=y
>CONFIG_MAPLE_MOUSE=y
>#
># Network File Systems
>#
># CONFIG_CODA_FS is not set
>CONFIG_NFS_FS=y
>CONFIG_NFS_V3=y
>CONFIG_ROOT_NFS=y
># CONFIG_NFSD is not set
>CONFIG_SUNRPC=y
>CONFIG_LOCKD=y
>CONFIG_LOCKD_V4=y
># CONFIG_SMB_FS is not set
># CONFIG_NCP_FS is not set
>
>
>my hardware:
>Dreamcast   -  192.168.0.4
>Broadband Adapter
>VGA Adapter
>1 Joystick
>1 Mouse
>1 Keyboard
>1 Mega-Memory Card (4 sets of 200 blocks if I recall correctly)
>
>nfs-server #1   -  192.168.0.3
>Redhat 7.0
>portmap-4.0-29
>/etc/exports = /mnt/dcnfs 192.168.0.4(rw)
>
>nfs-server #2   -  192.168.0.2
>Snap Server  (basically a hard drive on the network, built for NFS 
>sharing, I have successfuly NFS-mounted other shares from this server)
>
>
>----- End forwarded message -----
>