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11. The cdrom nfs server side

This section describes how to mount and export via NFS a cdrom drive.

Mount the cdrom. If you encounter a problem with your cdrom drive, read the CDROM-HOWTO. I assume that the cdrom device is /dev/hdd but it could be /dev/sr0 or /dev/hdb etc. The mount point I choose is /cdrom but you can choose the one you want:

 $ mount -t iso9660 /dev/hdd /cdrom
 

You have to set up nfs services. If something goes wrong, read the NFS-HOWTO

Verify your kernel supports nfs:

 $ cat /proc/filesystems 
 ext2
 nodev proc
 nodev nfs
 nodev ncpfs
 nodev devpts
 iso9660
 

Verify your portmapper can handle mountd and nfs client requests:

 $ rpcinfo -p
 program vers proto port
 100000 2 tcp 111 portmapper
 100000 2 udp 111 portmapper
 100005 1 udp 655 mountd
 100005 1 tcp 657 mountd
 100003 2 udp 2049 nfs
 100003 2 tcp 2049 nfs
 

Lines with nfs or portmapper have to be there. We have NFS on tcp? progress have been made!

It doesn't matter if you have only NFS on udp. NFS has to work, that's the thing you need.

Then, rerun portmap, mountd, nfs:

 $ /etc/rc.d/init.d/portmap.init stop
 Stopping INET services: portmap 
 $ /etc/rc.d/init.d/portmap.init start
 Starting portmapper: portmap
 $ /etc/rc.d/init.d/nfs stop
 Shutting down NFS services: rpc.mountd rpc.nfsd 
 $ /etc/rc.d/init.d/nfs start
 Starting NFS services: rpc.mountd rpc.nfsd 
 

/etc/rc.d/init.d/ is /sbin/init.d/ on SuSE Linux systems. I had a dream last night: LSB was respected. (LDB: Linux Standard Base)

Then, try to mount it "locally" (via nfs) on the source box and when the test is good remove the test directory:

 $ mkdir /tmp/nfstest
 $ mount -t nfs source:/cdrom /tmp/nfstest
 $ ls /tmp/nfstest/
 README debian/ locatedb.3 tools/
 TRANS.TBL ftp.netscape.com/ ls_lR.3 upgrade/
 boot/ install/ realaudio/
 
 $ echo great stuff !
 $ umount /tmp/nfstest
 $ rmdir /tmp/nfstest
 

Bad luck ? Read the NFS-HOWTO and /var/log/messages.

Check the nfs server with those commands:

 $ rpcinfo -p
 

Run portmap with the -v flag:

 $ portmap -v
 

kill portmap, mountd, nfsd and rerun them in this order: portmap, mountd, nfsd. Take a rest, get more coffee. Read again the NFS-HOWTO and restart.

Now, the exported cdrom drive nfs server is ready to work. Congratulations.


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