[Info-vax] Support of partitioning

[JF Mezei]

It is well known that VMS doesn't support partitioning has has had to do
some black magic to pretend to support it.

How difficult is it for VMS to support partitioning ? What is involved
in providing support ?

>From the ODS point of view, isn't just a question of remapping blocks ?

So for a 7000 block partition starting at physical block 2000, when ODS
wants to access block 0, it gets remapped to read physical block 2000 ?
Is that how it works ?

I take it that at boot, the system would have to look at all physical
drives to create virtual disk devices for each partition ?  Is that a
big problem ?

Are there performance issues with IOs first going to the virtual disk
driver that works out the virtual disk block into physical disk blocks
and then issues IO to the physical driver ? Or would the two be combined
into the same code/driver ?