1.9.x slices, newfs, and vinum problem?

Chris Turner c.turner at 199technologies.org
Sat Jul 14 17:12:52 PDT 2007

Matthew Dillon wrote:

>     The question is whether we can simply require that vinum partitions
>     skip the label area (i.e. the starting block has to be at least 16
>     for a partition created with a normal disklabel) or whether there
>     are backwards compatibility issues that require us to support vinum
>     writing into the disk's label area.

More seriously, I'm not sure if an existing configuration would be
forwards-compatible anyway due to the new label changes if someone had
used 'raw' slices, etc.

Although having to shift the on-disk filesystem layout for upgrade is a
different kind of animal compared to a 'dumpconfig', 'edit slice cfg in
file' 'recreate vinum setup' kind of a change, especially if you have
lots of data on the drives and have to copy it elsewhere to do the shift

I don't have anything setup with a vinum root disk, so not sure if that
is working / related to this portion of the code or not. Hopefully I'll
get around to testing vinum boot one day, but it hasn't arrived yet ..
Without knowing what the in-boot2-location code does thats probably all
I can say without spewing (more :) hot air onto the topic..

I suppose that's a brainstorm for possible impact..

- Chris

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