Re: file system handle

[James Pearson <james-p@moving-picture.com>]

David Dougall wrote:
> I am moving filesystems/disks to new NFS servers.  They are going to
> change major and minor numbers.  Is there any way I can prevent stale
> mounts with the fsid= option in the exports?
> I have tried this on a test environment, but when I try to create an fsid=
> option, it completely changes the filehandle format in the nfs packet.  Am
> I missing something, or are the default and forced fsid options
> incompatible?

I believe using the fsid= option does use a different file handle id 
type, so you can't directly do what you want with the fsid option.

However, you can re-export a file system with an added fsid= option - 
any existing mounts will still use the 'previous' file handle type based 
on the device id, but new mounts will use the new fsid file handle. You 
then will have to make sure all existing clients remount the file system 
before moving the disks.

I've done this before - but I had to make the export change well in 
advance, so that I could make sure all existing clients remounted the 
file system before the move.

James Pearson


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