Memory disk "a la mfsroot"?

Pierre-Luc Drouin pldrouin at
Thu Feb 11 15:30:49 UTC 2010

Matthew Seaman wrote:
> Hash: SHA1
> On 11/02/2010 14:53, Pierre-Luc Drouin wrote:
>> I would like to know if there is a mount command that allows to create a
>> memory disk that can be initialized from a file. What I am looking for
>> is something like mount_mfs -F, but that does not modify the actual
>> file. I know what I could easily to this by copying the content of the
>> file to the memory disk, but I am looking for a solution that can be
>> configured via fstab.
> Yes.  See mdconfig(8) -- there are examples in there of exactly what you
> want to do.
> 	Cheers,
> 	Matthew
> - -- 
> Dr Matthew J Seaman MA, D.Phil.                   7 Priory Courtyard
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I might be missing something in the mdconfig man page, but in the 
examples I see they always allow modifications to the backing file. As I 
said I am looking for a solution where the backing file is only read, 
but I want to mount the memory disk in read-write mode. Also, I want 
only the modifications to be kept in the RAM, not the initial files.


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