On Wed, Jul 03, 2019 at 04:20:59PM +0200, Christian Weisgerber wrote:
> Chris Ross:
>
> > Is there a hard reason SR_BOOT_LOADER_SIZE cannot be raised to sometime
> > larger, perhaps 1024 (instead of the current 320) ?
>
> That size is part of the disk layout.
>
> Looking at <dev/softraidvar.h>, the layout of a softraid partition
> is this:
>
> 16 sectors, unused (potential disklabel, boot block)
> + 64 sectors softraid metadata
> + 320 sectors boot loader space
> + 128 sectors boot block space
> followed by the actual data
>
> The boot block space is of dubious usefulness and unused as far as
> I can tell, so I guess it could be reused to modestly extend the
> boot loader space if there ever were a pressing reason.
Well, the question I had is: can I just make that whole block bigger.
Thus making the partition lead-in bigger. Is there a reason that whole
area can't just be enlarged?
I'm rebuilding on a single-disk system an OpenBSD 6.5 with SR_BOOT_LOADER_SIZE
set to 1024. Then I'll see how that behaves when I try to build a raid1
and install onto it.
For the case I had, I was teying to load a ~250mb boot loader, so 448
sectors wouldn't be enough for me.
- Chris
