On Tue, Aug 12, 2014 at 11:19 AM, Brian Anderson <b...@nwlink.com> wrote: > I am attempting to setup a BBB to boot via TFTP and mount a rootfs via NFS. > > I am using Robert Nelson's 2014-08-05 Debian lxde release image. I've > examined the nfs-uEnv.txt in the boot partition and had a brief look at how > the various environment variables interact with the default uboot setup. > With the latest BBB uboot setup, it appears that TFTP boot and NFS rootfs > functionality are now "packaged" together. > > I've also read William Herman's guides to setting up to boot via TFTP and > mount the rootfs using NFS. Whilst helpful, these guides are now a bit > dated (published June 2013) with respect to the latest uboot default setup. > > I have setup a VirtualBox image running Linux Mint on my MAC. I have > configured this image to be a NFS server and have arranged to export a > rootfs (copied from a uSD card flashed with a disk image or created directly > from RCN's rootfs tarball). I have also configured TFTP on this image. > > My questions: > > Where/how do I obtain a "zImage" to boot using TFTP? Is this simply the > vmlinuz-xxx image in the /boot partition of the rootfs? (Running the "file" > command on a vmlinuz image reports it to be a " Linux kernel ARM boot > executable zImage (little-endian)".)
Correct, just rename vmlinuz as zimage and dump into your /TFTP/ directory.. zImage (u-boot name) = vmlinuz (kernel output name) Also copy the (.dtb's) int /TFTP/dtbs/* > Unlike the normal so-called "uname" boot, the nfsboot setup does not appear > to use an initrd ramfs image. initrd ramfs's just don't work with nfs root... It'll hard lock on bootup.. Thus it's disabled.. > What function does this file system provide? > What impact, if any, does the lack of an initrd image have on a system > booted via TFTP and running a rootfs via NFS? > > In this new setup, what are the best practices for updating the kernel? > Given this setup, is it advisable to arrange to mount a user home directory > via another NFS share to support development? Or would it be better to > include the user home directory as part of a single (rootfs) NFS mount to > keep things simple? Install like you normally do... Just make sure on the server side to update the new vmlinuz -> zImage and *.dtb's into the /TFTP/ directory. (Since the tftp directory could be anywhere, i really didn't write a script for the bbb to handle it..) Regards, -- Robert Nelson http://www.rcn-ee.com/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
