Re: NFS and /dev/mdXpY

[Vlad Glagolev <stealth@sourcemage.org>]

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On Wed, 21 Apr 2010 12:09:20 -0500
Roger Heflin <rogerheflin@gmail.com> wrote:

> On Wed, Apr 21, 2010 at 11:48 AM, Vlad Glagolev <stealth@sourcemage.org> wrote:
> > Thanks for reply, Steve!
> >
> > parameters are pretty trivial, (rw,insecure) for exports, and defaults while mounting via ``mount host:/path /path'' command.
> >
> > Yes. That sounds interesting, since XFS works fine with there partitions.
> > Also, I must say it's WD20EARS drives (with 4kb sector size, though parted says it's 512b).
> >
> > I also tried another NFS daemon implementation (cvs version, not .22) -- unfsd (unfs3).
> > It mounts ok, but when I try to write any file to the server -- I get the same error (Stale NFS file handle).
> >
> > And on the server side in dmesg I see this:
> >
> > --
> > NFS: server 172.17.2.2 error: fileid changed
> > fsid 0:f: expected fileid 0x2033, got 0xb6d1e05fa150ce09
> > NFS: server 172.17.2.2 error: fileid changed
> > fsid 0:f: expected fileid 0x2033, got 0x26550b0132c0b1
> > NFS: server 172.17.2.2 error: fileid changed
> > fsid 0:f: expected fileid 0x2033, got 0x8202a60053000020
> > NFS: server 172.17.2.2 error: fileid changed
> > fsid 0:f: expected fileid 0x2033, got 0xe542f93ebc8fe157
> > NFS: server 172.17.2.2 error: fileid changed
> > fsid 0:f: expected fileid 0x2033, got 0xc00cd74ea904301
> > --
> >
> > looks like NFS protocol doesn't like something in partitioned software RAID.
> >
> 
> 
> Try manually setting the fsid=something in the exports file and
> reexport and remount on the target system, if there was a fsid
> collision of some sort then nfs would be hitting the wrong fs...
> 
> NFS generates the fsid automatically based on the devices major minor,
> and it is possible there is something odd about the major minor
> numbers that make them not unique...and collide with someone else
> major minor.

BAH! How simple!

Thank you very much, Roger!

I've just added fsid=1 (yes, only these few chars) to exports, and it worked! Unbelievable, really :)
Of course I've checked it on OpenBSD and Linux under both nfsd and unfsd. Works flawlessly.

Thanks a lot again.

But it seems to be a bug, right? If so, patches welcome.. I'll test it with great pleasure.

-- 
Dont wait to die to find paradise...
--
Cheerz,
Vlad "Stealth" Glagolev

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