On 3 July 2012 07:41, David Laight <da...@l8s.co.uk> wrote: > On Mon, Jul 02, 2012 at 10:42:18PM +0000, David Brownlee wrote: >> Module Name: src >> Committed By: abs >> Date: Mon Jul 2 22:42:18 UTC 2012 >> >> Modified Files: >> src/distrib/vax/miniroot: Makefile.inc >> src/sys/arch/vax/include: disklabel.h types.h >> src/sys/sys: bootblock.h >> >> Log Message: >> - Increase MAXPARTITIONS for vax from 8 to 16, using the standard NetBSD >> mechanism to ensure all existing /dev nodes continue to work > > How do you detect the format of an existing disklabel? > > I remember looking at this a few years back and deciding it was all fubar. > IIRC there is a 'partition count' field, but that is used as an upper > bound for the number of used partitions, not the size of the table. > I sort of remember that the number of partition slots tended to depend > on LABELOFFSET - and was 16 if that would fit into the available space. > > vax might be the only system that has (emulated?) disks where the disk > controller doesn't return the actual disk geometry/size - requiring it > be stored in the label?
The same way the compat code worked for i386 and other migrated ports - it just gets the first 8 partitions :)
