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I'm trying to prepare an Ubuntu environment for a diskless machine that will PXE boot and mount an NFS share as it's root. I've currently got another Ubuntu machine mounting the NFS share and I'm trying to debootstrap into it, but it has trouble creating devices over NFS:

root@kimiko:~# mount | grep Seiuchi on /mnt type nfs (rw,addr=
root@kimiko:~# debootstrap --arch i386 maverick /mnt
mknod: `/mnt/test-dev-null': Input/output error
E: Cannot install into target '/mnt' mounted with noexec or nodev

My NFS rule on the unRAID server is,no_root_squash,sync). I don't have the noexec or nodev options set. I've not got much experience with NFS, so I'm probably missing something basic in the way I'm sharing this, but my attempts at Googling for an answer isn't really turning anything useful up.

Does anyone have suggestions on what I might have missed or maybe relevant docs?

Edit: Creating normal files (and directories) works just fine, I just can't create devices...

root@kimiko:/mnt# mkdir foo
root@kimiko:/mnt# cd foo
root@kimiko:/mnt/foo# touch bar
root@kimiko:/mnt/foo# mknod quux c 4 64
mknod: `quux': Input/output error
root@kimiko:/mnt/foo# ls
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Have you tried touch /mnt/test to see if you can create any file on the NFS mount? – DerfK Feb 17 '11 at 6:22
Yeah, I can create normal files no problem, but it just won't let me create devices... see edit to OP. – Aaron B. Russell Feb 18 '11 at 13:46
up vote 0 down vote accepted

Seems like unRAID doesn't have mknod support in its filesystem driver right now, which seems like the root of my problem. If anyone wants to follow this issue, I've created this thread over in the unRAID forums.

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