install/58183: sysinst rejects MBR partitions before sector 64

[mlelstv%netbsd.org@localhost]

	Note: There was a bad value `nonc-critical' for the field `Severity'.
	It was set to the default value of `serious'.

>Number:         58183
>Category:       install
>Synopsis:       sysinst rejects MBR partitions before sector 64
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    install-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Apr 21 14:15:02 +0000 2024
>Originator:     Michael van Elst
>Release:        NetBSD 10.0
>Organization:
	
>Environment:
	
	
System: NetBSD gossam 10.0 NetBSD 10.0 (GENERIC) #10: Sat Mar 30 10:27:39 CET 2024 mlelstv@gossam:/home/netbsd10/obj.amd64/home/netbsd10/src/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:

When editing an MBR partition in sysinst, you can enter
a start sector 0..63, but then this is silently "corrected"
to start sector 64.

64 is probably the recommended alignment value, but this
doesn't enforce partition alignment as you can just
enter a start of sector 65 without "correction."

Another fault in the partition manager is that you
cannot add an MBR partition unless you delete one
partition (or all partitions?) first, then the
'Add a partition' menu entry appears.

When you add a new partition it gets "corrected" just
like when modifying an existing one.

>How-To-Repeat:
Try to install NetBSD in a MBR partition starting at sector 32.
>Fix:
	

>Unformatted: