Can file-backed memory disks act like slices?

Giorgos Keramidas keramida at
Sun Aug 7 03:28:20 GMT 2005

On 2005-08-07 02:13, Michael Dexter <dexter at> wrote:
> Hello all,
> I trust this is a Seldom Asked Question...

A very good one though.

> I am using file-backed memory disks (as in mdconfig -f) to prototype
> filesystems.
> root.img gets mounted first and usr.img, var.img and tmp.img get
> mounted below it and as such they are behaving as partitions.
> Is there any way to get a single memory disk to behave like a slice
> and itself be partitioned? That would give essentially:
> /dev/md0a
> or even
> /dev/md0s1a

Yes.  This should work fine.  I usually create just one slice in my
memory disks and then label the slice as usual.

> This would allow the four partition images to be combined into a
> single partitioned image.
> Yes, I have a legitimate use for this. :)

HEH :)

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